HomeMy WebLinkAbout21-3-30 draft 5B - 2018 res'l codeCHAPT 5B - RESIDENTIAL BUILDING CODE
Draft for discussion purposes
(DPW - Building Division)
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3/30/21 Draft
Note to the reader:
This draft incorporates by reference, the International Residential Code for One-
and Two-family Dwellings, 2018 Edition, (IRC), and Hawaii State Building Code
into a new chapter 5B of the Hawai‘i County Code. Proposed changes to the
language of the IRC, that have been incorporated into the Code, are indicated using
brackets and strike outs for repeals and underscoring for additions.
Please note that this draft does not include PART II of the bill that will contain
amendments to other ordinances.
AN ORDINANCE ESTABLISHING A RESIDENTIAL BUILDING CODE
PART I. NEW CHAPTER.
SECTION 1. The Hawai‘i County Code 1983 (2016 Edition, as amended), is amended by
adding a new chapter, relating to the residential building code, to be designated chapter 5B, and
to read as follows:
“CHAPTER 5B. RESIDENTIAL BUILDING CODE.
Article 1. General Provisions.
Section 5B-1-1. Title.
This chapter shall be known as the “residential building code.”
Section 5B-1-2. Purpose.
The purpose of this chapter is to provide minimum standards to safeguard life or limb,
health, property and public welfare by regulating and controlling the design, construction, quality
of materials, use and occupancy, location and maintenance of all buildings and structures within
the County and certain equipment specifically regulated herein. {5-1(b).}
Section 5B-1-3. Scope; exceptions.
This chapter shall apply to the design, construction, alteration, movement, enlargement,
replacement, repair, equipment, use and occupancy, location, removal and demolition of
detached one- and two-family dwellings and townhouses not more than three stories above grade
plane in height with a separate means of egress and their accessory structures not more than
three stories above grade plane in height. Exceptions to these minimum requirements are listed
below: {5-2, State Residential Code.}
This chapter shall not apply to:
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Exception: The following shall be permitted to be constructed in accordance with this code
where provided with a residential fire sprinkler system complying with the Hawai‘i County fire
code, chapter 26, Hawai‘i County Code:
1. Live/work units located in townhouses and complying with the requirements of Section
419, “Live/Work Units” of the International Building Code as adopted by the building
code, chapter 5A, Hawai‘i County Code.
2. Owner-occupied lodging houses with five or fewer guestrooms.
3. A care facility with five or fewer persons receiving custodial care within a dwelling unit.
4. A care facility with five or fewer persons receiving medical care within a dwelling unit.
5. A care facility for five or fewer persons receiving care that are within a single-family
dwelling.
Section 5B-1-4. Administrative provisions.
Provisions relating to permitting, enforcement, inspection, and other administrative
procedures pertaining to this chapter are contained in chapter 5, the construction administrative
code.
Section 5B-1-5. Existing buildings.
(a) Permitted buildings in existence at the time of the adoption of this chapter may have their
existing permitted use or occupancy continued if such use or occupancy was legal at the
time of the adoption of this chapter, provided such continued use does not constitute a
hazard to the general safety and welfare of the occupants and the public. {5-6(a), 3-180-10
SBC.}
(b) Alteration, repair, addition, and change of occupancy. Alteration, repair, addition, and
change of occupancy to a building or structure in existence at the time of the adoption of
this chapter shall comply with the requirements of the existing building code, chapter 5C,
Hawai‘i County Code. {5-6(b).}
Section 5B-1-6. Definitions.
As used in this chapter, unless it is apparent from the context that a different meaning is
intended:
“Accessory structure” means a structure not greater than 3,000 square feet (279 m2) in floor
area, and not over two stories in height, the use of which is customarily accessory to and
incidental to that of the dwelling and which is located on the same lot.
“Authority having jurisdiction” means the director of the department of public works, or
the director’s authorized representative.
“Building” means any structure used or intended for supporting or sheltering any use or
occupancy. The term shall include but not be limited to, any structure mounted on wheels such
as a trailer, wagon, or vehicle which is parked and stationary for any 24-hour period, and is used
for business or living purposes; provided, however, that the term shall not include a push cart or
push wagon which is readily movable and which does not exceed 25 square feet in area, nor shall
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the term include a trailer or vehicle, used exclusively for the purpose of selling any commercial
product therefrom, which hold a vehicle license and actually travels on public or private streets.
To the extent context otherwise permits and/or requires, the definitions of “building” as
used in chapters: 5A, the building code; 5B, the residential building code; 5C, the existing
building code; 5D, the electrical code; 5E, the energy conservation code; and 5F, the plumbing
code; are incorporated by reference herein. {202, IBC; 5-71(1).}
“Building work” means the design, construction, alteration, relocation, enlargement,
replacement, repair, removal, demolition of any building or structure, or any other activities
regulated by this chapter. {5-19(a).}
“Chapter” means this chapter. {SBC.}
“This code” means the residential building code, contained in chapter 5B, or the
construction administrative code, contained in chapter 5, or both, as the context requires.
{Source: 5A-1-6.}
“Construction code” means collectively: chapter 5, the construction administrative code;
chapter 5A, the building code; chapter 5B, the residential building code; chapter 5C, the existing
building code; chapter 5D, the electrical code; chapter 5E, the energy conservation code; chapter
5F, the plumbing code; and all administrative rules adopted pursuant to these chapters.
“Dwelling” means any building that contains one or two dwelling units used, intended, or
designed to be built, used, rented, leased, let or hired out to be occupied, or that are occupied for
living purposes. {202, IBC.}
“Existing building” means a building erected prior to the effective date of this chapter, or
one for which a legal permit has been issued.
“Existing structure” means a structure erected prior to the effective date of this chapter, or
one for which a legal permit has been issued. {202, IBC.}
“ICC” means the International Code Council. {SBC.}
“Owner-builder” means owners or lessees of property who build or improve buildings or
structures on their property for their own use, or for use by their immediate family. This
definition shall not preempt owner-builder by exemption as defined by section 444-2.5, Hawai‘i
Revised Statutes. {5-4, HCC and 444-2.5, HRS.}
“Permit” means a formal authorization issued by the authority having jurisdiction that
authorizes performance of specified work, pursuant to the construction code, including the
following chapters and all administrative rules adopted pursuant to the following chapters:
(1) 5, the construction administrative code;
(2) 5A, the building code;
(3) 5B, the residential building code;
(4) 5C, the existing building code;
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(5) 5D, the electrical code;
(6) 5E, the energy conservation code; and
(7) 5F, the plumbing code.
“Person” means any individual, firm, partnership, association, or corporation; or its or their
successors or assigns, according to the context thereof. {9-5.}
Section 5B-1-7. Compliance required.
(a) No person shall perform or cause to be performed any building work which does not
comply with the provisions of this code or any permit issued pursuant to this code.
(b) No person shall perform any work covered by this code in violation of the provisions of
chapters 444 or 448E, Hawai‘i Revised Statutes. {9-15(b).}
(c) Any approval or permit issued pursuant to the provisions of this code shall comply with all
applicable requirements of this code. {5-12.}
(d) The granting of a permit, variance, or approval of plans or specifications pursuant to this
code does not dispense with the necessity to comply with any applicable law to which a
permit holder may also be subject. {5-12.}
Section 5B-1-8. Conflict.
(a) If any provisions of this code conflict with or contravene provisions of the Hawai‘i State
Residential Code or the International Residential Code, 2018 Edition, that have been
incorporated by reference, the provisions of this code shall prevail as to all matters and
questions arising out of the subject matter of such provisions. {5-5.}
(b) In situations where two or more provisions of this code and any applicable law, other than
those provided for in subsection (a), cover the same subject matter, the stricter shall be
complied with. {5-12(8).}
Section 5B-1-9. References to model codes.
The codes and standards referenced in this code shall be considered to be part of the
requirements of this code to the prescribed extent of each such reference and as further regulated
in Sections 5B-1-8.
(1) Wherever referenced in this code, the International Building Code shall mean the building
code, chapter 5A, Hawai‘i County Code.
(2) Wherever referenced in this code, the International Residential Code, shall mean the
residential building code, chapter 5B, Hawai‘i County Code.
(3) Wherever referenced in this code, the International Existing Building Code, shall mean the
existing building code, chapter 5C, Hawai‘i County Code.
(4) Wherever referenced in this code, the International Electrical Code shall mean the electrical
code, chapter 5D, Hawai‘i County Code.
(5) Wherever referenced in this code, the International Energy Conservation Code, shall mean
the energy conservation code, chapter 5E, Hawai‘i County Code.
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(6) Wherever referenced in this code, the International Plumbing Code shall mean the
plumbing code, chapter 5F, Hawai‘i County Code.
(7) Wherever in this Code reference is made to the International Fuel Gas Code, the provisions
of the International Fuel Gas Code shall be deemed to be only guidelines and not
mandatory.
(8) Wherever in this Code reference is made to the International Mechanical Code, the
provisions of the International Mechanical Code shall be deemed to be only guidelines and
not mandatory.
(9) Wherever in this Code reference is made to the International Property Maintenance Code,
the provisions of the International Property Maintenance Code shall be deemed to be only
guidelines and not mandatory.
(10) Wherever referenced in this code, the International Fire Code shall mean the fire code,
chapter 26, Hawai‘i County Code.
Exception: Where enforcement of a code provision would violate the conditions of the listing of
the equipment of appliance, the condition of the listing shall govern.
{To address references in the IRC to other Model Codes 5A-1-9; State IRC Sections 102.4 and
102.4.4-102.4.11}
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Article 2. Installation Requirements.
Section 5B-2-1. International residential code adopted.
(a) The “International Residential Code for One- and Two-family Dwellings, 2018 Edition,” as
published in 2017 by the International Code Council, Incorporated, 500 New Jersey
Avenue, 6th Floor, Washington, DC 20001, is adopted by reference and made a part of this
code, subject to any amendments hereinafter set forth in this chapter. Hereafter, the
“International Residential Code for One- and Two-family Dwellings, 2018 Edition,” shall
be referred to as the “International Residential Code.” The appendices of the International
Residential Code are not adopted unless otherwise provided in this chapter.
(1) The following appendices of the International Residential Code are adopted by
reference and made a part of this chapter, subject to any amendments set forth in
administrative rules or this chapter:
(A) Appendix H, Patio Covers;
(B) Appendix M, Home Day Care – R-3 Occupancy; and
(C) Appendix Q, Tiny Homes.
(2) The following appendix is added to the International Residential Code and made a
part of this chapter, subject to any amendments set forth in administrative rules or this
chapter: Appendix L, Factory-built Homes.
(b) The scope, technical specifications, and exemptions set forth in the International
Residential Code are hereby adopted as the standard for building work covered by this
code, provided there are no specific provisions in any other section of this code covering
the particular matter.
(c) A copy of the International Residential Code shall be available for public inspection at the
Hilo and Kailua-Kona offices of the department of public works and at the office of the
County clerk. {5-3(a).}
(d) The International Residential Code adopted and incorporated by reference into this code,
shall be subject to the amendments hereinafter set forth.
(1) Chapter 1, “Scope and Administration,” of the International Residential Code is
deleted in its entirety.
{Need to reconcile proposed State Amendments with Chapter 5B Admin}
(2) Chapter 1, Part 2 – “Administration and Enforcement” of the International Residential
Code is deleted in its entirety.
(3) Section R202, “Definitions,” of the International Residential Code is amended by
adding the following definitions:
“AUTHORITY HAVING JURISDICTION means the director of the
department of public works, or the director’s authorized representative.”
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“BUILDING, ENCLOSED is a building that does not comply with
the requirements for open or partially enclosed building.”
“BUILDING, OPEN is a building having each wall at least 80
percent open. Ao>= Ag where:
1. Ao = total area of openings in a wall that receives positive
external pressure, in ft2 (m2); and
2. Ag = the gross area of that wall in which Ao is identified, in
ft2 (m2).”
“BUILDING, PARTIALLY ENCLOSED is a building that complies
with both of the following conditions:
1. The total area of openings in a wall that receives positive
external pressure exceeds that sum of the areas of openings in
the balance of the building envelope (walls and roof) by more
than 10 percent; and
2. The total area of openings in a wall that receives positive
external pressure exceeds 4 ft² (0.37 m²) or 1 percent of the
area of that wall, whichever is smaller, and the percentage of
openings in the balance of the building envelope does not
exceed 20 percent.
These conditions are expressed by the following equations:
1. Ao > 1.1Aoi
2. Ao > 4 ft² (0.37 m²) or > 0.01 Ag, whichever is smaller, and
Aoi/Agi ≤ 0.20
Where:
Ao, Aq are defined for open building.
Aoi = the sum of the areas of openings in the building envelope
(walls and roof) not including Ao, in ft² (m²).
Agi = the sum of the gross surface areas of the building envelope
(walls and roof) not including Ag, in ft² (m²).”
“CARPORT is a private garage which is at least 100 percent open on
one side and with 50 percent net openings on another side or which is
provided with an equivalent of such openings on two or more sides.
A private garage which is 100 percent open on one side and 25
percent open on another side with the latter opening so located to
provide adequate cross ventilation may be considered a carport when
approved by the building official. Carports not open on two or more
sides shall be considered to be a garage”
“EXISTING BUILDING is a building for which a legal building
permit has been issued, or one which complied with this Code in
effect at the time the building was erected.”
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“FAMILY shall be as defined in the Zoning Code except that a
nursing, care home, or other similar facility with not more than five
patients may be considered a family under this code.”
“FIRE CODE. The State Fire Code as adopted by the State Fire
Council.”
“PRIVATE GARAGE or GARAGE. A building or portion of a
building in which motor vehicles used by the tenants of the building
or buildings on the premises are stored or kept, without provisions for
repairing or servicing such vehicles for profit. ”
(4) Section R202, “Definitions,” of the International Residential Code is amended by
amending the following definitions to read as follows:
“BUILDING.[Any one- or two-family dwelling or portion thereof,
including townhouses, used or intended to be used for human
habitation, for living, sleeping, cooking or eating purposes, or any
combination thereof, or any accessory structure. For the definition
applicable in Chapter 11, see Section N1101.6.] Any structure used or
intended for supporting any use or occupancy. The term shall include
but not be limited to any structure mounted on wheels such as a
trailer, wagon or vehicle which is parked and stationary for any 24-
hour period, and is used for business or living purposes; provided,
however, that the term shall not include a push cart or push wagon
which is readily movable and which does not exceed 25 square feet in
area, nor shall the term include a trailer or vehicle, used exclusively
for the purpose of selling any commercial product therefrom, which
hold a vehicle license and actually travels on public or private streets.
To the extent context otherwise permits and/or requires, the
definitions of “building” as used in the following chapters of the
Hawai‘i County Code: 5A, the building code; 5B, the residential
building code; 5C, the existing building code; 5D, the electrical code;
5E, the energy conservation code; and 5F, the plumbing code; are
incorporated by reference herein.”
{Added to be consistent with def in sec. 5B-1-6.}
“BUILDING OFFICIAL.[The officer or other designated authority
charged with the administration and enforcement of this code, or a
duly authorized representative. For the definition applicable in
Chapter 11, see Section N1101.6] The director of the County
department of public works or the director’s authorized
representative.”
(5) Subsection R301.1.1, “Alternative provisions,” of the International Residential Code
is amended to read as follows:
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“R301.1.1 Alternative provisions. As an alternative to the requirements in Section
R301.1, the following standards are permitted subject to the limitations of this code
and the limitations therein. Where engineered design is used in lieu of or in
conjunction with these standards, the design shall comply with the [International
Building Code.] the Building Code, Chapter 5A, Hawai‘i County Code.
1. AWC Wood Frame Construction Manual (WFCM) 2018.
2. AISI Standard for Cold-Formed Steel Framing—Prescriptive Method for One-
and Two-Family Dwellings (AISI S230 - 2015).
3. [ICC Standard on the Design and Construction of Log Structures (ICC 400).]
ICC Standard for Residential Construction in High-Wind Regions (ICC 600-
14).”
{SRC 1.1}
(6) Subsection R301.1.3, “Engineered design,” of the International Residential Code is
amended to read as follows:
“R301.1.3 Engineered design. When a building of otherwise conventional
construction contains structural elements exceeding the limits of Section R301 or
otherwise not conforming to this code, these elements shall be designed in accordance
with accepted engineering practice using the Alternative Provisions listed in
R301.1.1. The extent of such design need only demonstrate compliance of
nonconventional elements with other applicable provisions and shall be compatible
with the performance of the conventional framed system. Engineered design in
accordance with the [International Building Code] Building Code, Chapter 5A,
Hawai‘i County Code, is permitted for all buildings and structures, and parts thereof,
included in the scope of this code. Engineered design in accordance with the
International Building Code Building Code, Chapter 5A, Hawai‘i County Code, shall
be required when a building exceeds three stories or 3000 square feet of gross floor
area.”
{from State IRC Amendment, SRC (12)}
(7) Section R301, “Design Criteria,” of the International Residential Code is amended by
adding subsection 301.1.4, “Complete load path and uplift ties,” to read as follows:
“R301.1.4 Complete load path and uplift ties. Blocking, bridging, straps, approved
framing anchors, or mechanical fasteners shall be designed and installed to provide
continuous ties from the roof to the foundation system.
Sheet metal clamps, ties, or clips, must be formed of galvanized steel or other
approved corrosion-resistant material not less than 0.040 inch (1.01
mm) nominal thickness. Uplift resistance shall be in accordance with Table R802.11.”
{Oahu IRC Amendment.}
(8) Table R301.2(1), “Climatic and Geographic Design Criteria,” of the International
Residential Code is deleted in its entirety and replaced with the following:
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“TABLE R301.2(1)
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
WIND
SPEED
(mph)
SEISMIC
DESIGN
CATEGORY
SUBJECT TO DAMAGE FROM FLOOD
HAZARDS Weathering Termite Decay
Per
Figure
R301.2(8)
D2 or E Negligible Very
Heavy
Moderate
to severe
FEMA or
Chapter 27
HCC”
{Oahu IRC Amendment.}
(9) Subsection 301.2.1, “Wind design criteria,” of the International Residential Code is
amended to read as follows:
“R301.2.1 Wind design criteria. Buildings and portions thereof shall be constructed
in accordance with the wind provisions of this code [using] provided that the ultimate
design wind [speed in Table R301.2(1)] speed, VULT, as determined from Figure
R301.2(5)A, is less than 130 mph. The structural provisions of this code for wind
loads are not permitted where wind design is required [as specified in Section
R301.2.1.1.] when VULT, determined from [Figures] Figure R301.2(5)(A), is equal to
or greater than 130 mph. Where different construction methods and structural
materials are used for various portions of a building, the applicable requirements of
this section for each portion shall apply. Where not otherwise specified, the wind
loads listed in Table R301.2(2) adjusted for height and exposure using Table
R301.2(3) shall be used to determine design load performance requirements for wall
coverings, curtain walls, roof coverings, exterior windows, skylights, garage doors
and exterior doors. Asphalt shingles shall be designed for wind speeds in accordance
with Section R905.2.4. A continuous load path shall be provided to transmit the
applicable uplift forces in Section R802.11.1 from the roof assembly to the
foundation. The ultimate design wind speed, VULT, in the State Residential Code is
equal to the basic design wind speed, V, in the Building Code, Chapter 5A, Hawai‘i
County Code.
{from State IRC Amendment, SRC (8).}
(10) Subsection R301.2.1.1, “Wind limitations and wind design required,” of the
International Residential Code is amended to read as follows:
“R301.2.1.1 Wind limitations and wind design required. The wind
provisions of this code shall not apply to the design of buildings where wind design is
required in accordance with [Figure R301.2(5)B] Subsection R301.2.1.
Exceptions:
1. For concrete construction, the wind provisions of this code shall apply in
accordance with the limitations of Sections R404 and R608.
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2. For structural insulated panels, the wind provisions of this code shall apply in
accordance with the limitations of Section R610.
3. For cold-formed steel light-frame construction, the wind provisions of this code
shall apply in accordance with the limitations of Sections R505, R603 and R804.
In regions where wind design is required in accordance with [Figure
R301.2(5)B] Subsection R301.2.1, the design of buildings for wind loads shall be in
accordance with one or more of the following methods:
1. AWC Wood Frame Construction Manual (WFCM) 2018.
2. ICC Standard for Residential Construction in High-Wind Regions (ICC 600-14).
3. [ASCE Minimum Design Loads for Buildings and Other Structures (ASCE 7-10).
4.] AISI Standard for Cold-Formed Steel Framing—Prescriptive Method for One-
and Two-Family Dwellings (AISI S230-2015).
[5]4. [International Building Code] The Building Code, Chapter 5A, Hawai‘i County
Code.
The elements of design not addressed by the methods in Items 1 through [5]4
shall be in accordance with the provisions of this code.
[Where ASCE 7 or the International Building Code is used for the design of the
building, the wind speed map and exposure category requirements as specified in
ASCE 7 and the International Building Code shall be used.]
Where wind design is required and design is in accordance with the methods in
Items 1 through 3, the building must be provided with opening protection for
windborne debris. Options for opening protection or alternatives to opening
protection shall be in accordance with the Building Code, Chapter 5A, Hawai‘i
County Code.”
{from State IRC Amendment, SRC (9)}
(11) Subsection R301.2.1.2, “Protection of openings” of the International Residential
Code is amended to read as follows:
“R301.2.1.2 Protection of openings. [Exterior glazing] Windows in buildings
located in windborne debris regions shall [be] have glazed openings protected from
windborne debris. Glazed opening protection for windborne debris shall meet the
requirements of the Large Missile Test of ASTM E1996 and ASTM E1886 as
modified in Section 301.2.1.2.1. [Garage door glazed opening protection for
windborne debris shall meet the requirements of an approved impact-resisting
standard or ANSI/DASMA 115.]
[Exception] Exceptions:
1. Wood structural panels with a minimum thickness of [not less than]7/16 inch (11
mm) and a maximum panel span of [not more than] 8 feet (2438 mm) [shall be]
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are permitted for opening protection in one- and two-story buildings classified as
Group R-3 or R-4 occupancy. Panels shall be precut [and] so that they are
attached to the framing surrounding the opening containing the product with the
glazed opening. Panels shall be predrilled as required for the anchorage method
and shall be secured with the attachment hardware provided and anchors
permanently installed on the building. [Attachments shall be designed to resist the
component and cladding loads determined in accordance with either Table
R301.2(2) or ASCE 7, with the permanent corrosion-resistant attachment
hardware provided and anchors permanently installed on the building.]
Attachment in accordance with Table R301.2.1.2 with corrosion-resistant
attachment hardware provided and anchors permanently installed on the building
is permitted for buildings with a mean roof height of 45 feet (13 728 mm) or less,
where the ultimate design wind speed, Vult’ is 180 mph (290 kph) or less.
2. Glazing in accessory structures to the single family dwellings including but not
limited to greenhouses and minor storage sheds.
3. Partially enclosed and open occupancy R-3 buildings shall be permitted to be
designed without unprotected openings subject to the following requirements.
3.1. For each direction of wind, determination of enclosure classification shall
be based on the assumption that all unprotected glazing on windward
walls are openings while glazing on the remaining walls and roof are
intact and are not assumed to be openings.
3.2. Partially enclosed and open occupancy R-3 buildings without wind-borne
debris protection shall also include a residential safe room in accordance
with Section 429, Hawaii residential safe room, of the Building Code,
Chapter 5A, Hawai‘i County Code, or alternatively provide an
equivalently sized room structurally protected by construction complying
with Section 429.5, of the Building Code, Chapter 5A, Hawai‘i County
Code.”
{Brought in from IBC Appendix W for consistency}
(12) Table R301.2.1.2, “Windborne debris protection fastening schedule for wood
structural panels,” of the International Residential Code is deleted in its entirety and
replaced with the following:
“TABLE R301.2.1.2
WINDBOURNE DEBRIS PROTECTION FASTENING
SCHEDULE FOR WOOD STRUCTURAL PANELS a,b,c,d
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For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound = 4.448N = 0.454 kg, 1 mile per hour = 0.447 m/s = 1.609 km/h.
a. This table is based on a 175 mph ultimate design wind speed and a mean roof height of 45 feet.
b. Fasteners shall be installed at opposing ends of the wood structural panel. Fasteners shall be located a
minimum of 1 inch from the edge of the panel.
c. Anchors shall penetrate through the exterior wall covering with an embedment length of 2 inches minimum
into the building frame. Fasteners shall be located a minimum of 2-1/2 inches from the edge of concrete
block or concrete.
d. Where panels are attached to masonry or masonry/stucco, they shall be attached utilizing vibration-resistant
anchors having a minimum withdrawal capacity of 1,500 pounds.”
{Brought in from IBC Appendix W for consistency}
(13) Figure R301.2(5)(a) “Ultimate Design Wind Speeds” of the International Residential
Code is deleted in its entirety and replaced with Figure R301.2(5)(a) County of
Hawai‘i Ultimate Wind Speed, VULT, for Components and Cladding, to read as
follows:
Fastener Type
Fastener Spacing
Panel span ≤ 4
feet
4 feet < Panel span ≤
6 feet
6 feet < Panel Span
≤ 8 feet
No. 8 Wood screw based anchor
with 2-inch embedment length 16” 10” 8”
No. 10 Wood screw based
anchor with 2-inch embedment
length
16” 12” 9”
1/4-inch lag screw based anchor
with 2-inch embedment length 16” 16” 16”
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Figure R301.2(5)(a) County of Hawai‘i Ultimate Wind Speed, VULT, for Components
and Cladding
{SRC (10)}
Ultimate
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(14) Figure R301.2(5)(b) “Regions Where Wind Design is Required” of the International
Residential Code is deleted in its entirety and replaced with Figure R301.2(5)(b)
“County of Hawai‘i Ultimate Wind Debris Zone,” to read as follows:
Figure R301.2(5)(b) County of Hawai‘i Ultimate Wind Debris Zone
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(15) Subsection R301.2.1.4, “Exposure category,” of the International Residential Code is
repealed in its entirety and replaced with the following:
“R301.2.1.4 Exposure Category. The exposure category shall be determined from
Figure R301.2.1.4(a) or using the provisions of ASCE 7-10.”
{ SRC (11)}
(16) Section R301, “Design Criteria,” of the International Residential Code is amended by
adding Figure R301.2.1.4(a), “Exposure Category Zones for Hawai‘i County,” to read
as follows:
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Figure R301.2.1.4(a) Exposure Category Zones for Hawai‘i County
{SRC (11) }
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(17) Subsection R301.2.1.5, “Topographic wind effects,” of the International Residential
Code is deleted in its entirety and replaced with the following:
“R301.2.1.5 Topographic wind effects. Topographic wind speed effects shall be
considered in the design of the building. Buildings designed using the ultimate wind
speed as determined from Figures R301.2(5)(a) and wind exposure categories
determined in accordance with section R301.2.1.4 shall be deemed to comply with
this section.”
{SRC (12).}
(18) Subsection R301.2.1.5.1, “Simplified topographic wind speed-up method,” of the
International Residential Code is deleted in its entirety.
{ SRC (13)}
(19) Section R301, “Design Criteria,” of the International Residential Code is amended by
adding Table R301.2(4), “Determination of Seismic Design Category by Location-
Site Class D,” to read as follows:
Table R301.2(4) Seismic Design Category by Location-Site Class D
Location
Seismic
Design
Category
Hawai‘i : North and South Kohala, Hamakua, & North Hilo Districts D2
All other Hawai‘i County Districts E
{ SRC (14)}
(20) Subsection R301.2.2.1, “Determination of seismic design category,” of the
International Residential Code is amended to read as follows:
“R301.2.2.1 Determination of seismic design category. Buildings shall be assigned
a seismic design category in accordance with Table R301.2(4) or Figure R301.2(2).
{ SRC (14)}
(21) Subsection R301.2.2.1.1, “Alternate determination of seismic design category,” of the
International Residential Code is deleted in its entirety.
{ SRC (15)}
(22) Subsection R301.2.2.6, “Irregular buildings,” of the International Residential Code is
amended to read as follows: (Although not underscored, figures are intended to be
added into this subsection.)
“R301.2.2.6 Irregular buildings. “The seismic provisions of this code shall not be
used for structures, or portions thereof, located in Seismic Design Categories [C,] D0,
D1 and D2 and considered to be irregular in accordance with this section. A building
or portion of a building shall be considered to be irregular where one or more of the
19
conditions defined in Items 1 through 7 occur. Irregular structures, or irregular
portions of structures, shall be designed in accordance with [accepted engineering
practice] the Building Code, Chapter 5A, Hawai‘i County Code, to the extent the
irregular features affect the performance of the remaining structural system. Where
the forces associated with the irregularity are resisted by a structural system designed
in accordance with [accepted engineering practice] the Building Code, Chapter 5A,
Hawai‘i County Code, the remainder of the building shall be permitted to be designed
using the provisions of this code.
1. Shear wall or braced wall offsets out of plane. Conditions where exterior
shear wall lines or braced wall panels are not in one plane vertically from the
foundation to the uppermost story in which they are required see Figure
R301.2.2.6(1).
Figure R301.2.2.6(1)
Braced Wall Panels Out of Plane
Exception: For wood light-frame construction, floors with cantilevers or
setbacks not exceeding four times the nominal depth of the wood floor joists,
see Figure R301.2.2.6(2), are permitted to support braced wall panels that are
out of plane with braced wall panels below provided that all of the following
are satisfied:
1. Floor joists are nominal 2 inches by 10 inches (51 mm by 254 mm) or
larger and spaced not more than 16 inches (406 mm) on center.
2. The ratio of the back span to the cantilever is not less than 2 to 1.
3. Floor joists at ends of braced wall panels are doubled.
4. For wood-frame construction, a continuous rim joist is connected to ends
of cantilever joists. Where spliced, the rim joists shall be spliced using a
galvanized metal tie not less than 0.058 inch (1.5 mm) (16 gage) and 1-
1/2 inches (38 mm) wide fastened with six 16d nails on each side of the
splice; or a block of the same size as the rim joist and of sufficient length
to fit securely between the joist space at which the splice occurs, fastened
with eight 16d nails on each side of the splice.
5. Gravity loads carried at the end of cantilevered joists are limited to
uniform wall and roof loads and the reactions from headers having a span
of 8 feet (2438 mm) or less.
20
Figure R301.2.2.6(2)
Braced Wall Panels Supported by Cantilever or Setback
2. Lateral support of roofs and floors. Conditions where a section of floor
or roof is not laterally supported by shear walls or braced wall lines on all
edges. See Figure R301.2.2.6(3).
Figure R301.2.2.6(3)
Floor or Roof Not Supported on all Edges
Exception: Portions of floors that do not support shear walls, braced wall
panels above, or roofs shall be permitted to extend not more than 6 feet (1829
mm) beyond a shear wall or braced wall line. See Figure R301.2.2.6(4).
Figure R301.2.2.6(4)
Roof or Floor Extension Beyond Braced Wall Line
3. Shear wall or braced wall offsets in plane. Conditions where the end of
a braced wall panel occurs over an opening in the wall below and extends more
21
than 1 foot (305 mm) horizontally past the edge of the opening. This provision
is applicable to shear walls and braced wall panels offset in plane and to braced
wall panels offset out of plane in accordance with the exception to Item 1. See
Figure R301.2.2.6(5).
Figure R301.2.2.6(5)
Braced Wall Panel Extension Over Opening
Exception: For wood light-frame wall construction, one end of a braced wall
panel shall be permitted to extend more than 1 foot (305 mm) over an opening
not more than 8 feet (2438 mm) in width in the wall below provided that the
opening includes a header in accordance with all of the following:
1. The building width, loading condition and framing member species
limitations of Table R602.7(1) shall apply.
2. The header is composed of:
2.1. Not less than one 2 x 12 or two 2 x 10 for an opening not more than 4
feet (1219 mm) wide.
2.2. Not less than two 2 x 12 or three 2 x 10 for an opening not more than
6 feet (1829 mm) in width.
2.3. Not less than three 2 x 12 or four 2 x 10 for an opening not more than
8 feet (2438 mm) in width.
3. The entire length of the braced wall panel does not occur over an opening
in the wall below.
4. Floor and roof opening. Conditions where an opening in a floor or roof
exceeds the lesser of 12 feet (3658 mm) or 50 percent of the least floor or roof
dimension. See Figure R301.2.2.6(6).
Figure R301.2.2.6(6)
Opening Limitations for Floor and Roof Diaphragms
22
5. Floor level offset. Conditions where portions of a floor level are vertically
offset. See Figure R301.2.2.6(7).
Exceptions:
1. Framing supported directly by continuous foundations at the perimeter of
the building.
2. For wood light-frame construction, floors shall be permitted to be
vertically offset where the floor framing is lapped or tied together as
required by Section R502.6.1.
Figure R301.2.2.6(7)
Portions of Floor Level Offset Vertically
6. Perpendicular shear wall and wall bracing. Conditions where shear walls
and braced wall lines do not occur in two perpendicular directions. See Figure
R301.2.2.6(8).
Figure R301.2.2.6(8)
Braced Wall Lines Not Perpendicular
7. Wall bracing in stories containing masonry or concrete
construction. Conditions where stories above grade plane are partially or
completely braced by wood wall framing in accordance with Section R602 or
cold-formed steel wall framing in accordance with Section R603 include
masonry or concrete construction. Where this irregularity applies, the entire
23
story shall be designed in accordance with [accepted engineering practice] the
Building Code, Chapter 5A, Hawai‘i County Code.
Exceptions: Fireplaces, chimneys and masonry veneer in accordance with this
code.
{ SRC (16)}
(23) Subsection R303.1, “Habitable rooms,” of the International Residential Code is
amended to read as follows:
“R303.1 Habitable rooms. All habitable rooms shall have an aggregate glazing area
of not less than [8] 10 percent of the floor area of such rooms. Natural ventilation
shall be through windows, [skylights,] doors, louvers, or other approved openings to
the outdoor air. Such openings shall be provided with ready access or shall otherwise
be readily controllable by the building occupants. [The] Unless required otherwise by
the Energy Conservation Code, Chapter 5E, Hawai‘i County Code, the minimum
openable area to the outdoors shall be [not less than 4] 5 percent of the floor area
being ventilated.
Exceptions:
1. The glazed areas need not be openable where the opening is not required by
section R310 and a whole-house mechanical ventilation system is installed in
accordance with Section M1505.
2. The glazed areas need not be installed in rooms where Exception 1 above is
satisfied and artificial light is provided that is capable of producing an average
illumination of 6 footcandles (65 lux) over the area of the room at a height of 30
inches (762mm) above the floor level.
3. Use of sunroom and patio covers, as defined in Section R202, shall be permitted
for natural ventilation if in excess of [40] 65 percent of the exterior sunroom walls
are open, or are enclosed only by insect screening.”
{from existing chapter 5A section 310.3.5(a)}
(24) Subsection R303.3, “Bathrooms,” of the International Residential Code is amended to
read as follows:
“R303.3 Bathrooms. Bathrooms, water closet compartments, laundry rooms, and
other similar rooms shall be provided with [aggregate glazing area in windows of not
less than 3 square feet (0.3 m2), one-half of which must be openable.] natural
ventilation by means of openable exterior openings with an area not less than one
twentieth of the floor area of such rooms with a minimum of 1 ½ square feet.”
Exception: The glazed areas shall not be required where artificial light and a local
exhaust system are provided. The minimum local exhaust rates shall be determined
in accordance with Section M1505. Exhaust air from the space shall be exhausted
directly to the outdoors.”
{from existing chapter 5A section 310.3.5(c)}
24
(25) Subsection R309.3, “Flood hazard areas,” of the International Residential Code is
amended to read as follows:
“R309.3 Flood hazard areas. [For buildings located in flood hazard areas as
established by Table R301.2(1), garage floors shall be:
1. Elevated to or above the design flood elevation as determined in Section R322.
2. Located below the design flood elevation provided that the floors are at or above
grade on not less than one side, are used solely for parking, building access or
storage, meet the requirements of Section R322 and are otherwise constructed in
accordance with this code.] Buildings located within areas of special flood
hazards pursuant to Chapter 27, Hawai‘i County Code, shall be designed and
constructed in accordance with Chapter 27, Hawai‘i County Code.”
{Proposed Amendment. See also (34) “Flood hazard areas”.}
(26) Subsection R310.2.1, “Minimum opening area,” of the International Residential Code
is amended to read as follows:
“R310.2.1 Minimum opening area. Emergency and escape rescue openings shall
have a net clear opening of not less 5.7 square feet (0.530 m2). The net clear opening
dimensions required by this section shall be obtained by the normal operation of the
emergency escape and rescue opening from the inside. The net clear height of the
opening shall be not less than 24 inches (610 mm) and the net clear width shall be not
less than 20 inches (508 mm).
[Exception] Exceptions:
1. Grade floor openings or below-grade openings shall have a net clear opening area
of not less than 5 square feet (0.465 m2).
2. Glass jalousie bladed windows may be used for emergency escape or rescue.”
{proposed Amendment carry over from existing Ch 5A 310.3.4}
(27) Subsection R313.2, “One-and two-family dwellings automatic fire sprinkler
systems,” is amended to read as follows:
“An automatic residential fire sprinkler system shall be installed in one-and two-
family dwellings.
[Exception] Exceptions:
1. An automatic residential fire sprinkler system shall not be required for additions or
alterations to existing buildings that are not already provided with an automatic
residential sprinkler system.
2. In accordance with section 46-19.8, Hawai‘i Revised Statutes, “Fire sprinklers;
residences,” until June 30, 2027 the installation or retrofitting of automatic fire
sprinklers or an automatic fire sprinkler system shall not be required in:
2.1 Any new or existing detached one- or two-family dwelling unit in a
structure used only for residential purposes; and
25
2.2 Nonresidential agricultural and aquacultural buildings and structures located
outside an urban area.
Provided that Exception 2 shall not apply to new homes that require a variance from
access road or firefighting water supply requirements.”
(28) Subsection R317.1, “Location required,” of the International Residential Code is
amended by amending the first paragraph of this subsection to read as follows:
(Paragraphs numbered 1 through 7 that follow this paragraph, shall remain
unchanged.)
“R317.1 Location required. Protection of wood and wood-based products from
decay shall be provided in the following locations by the use of [naturally durable
wood or] wood that is preservative-treated in accordance with AWPA U1 for the
species, product, preservative and end use. Preservatives shall be listed in Section 4 of
AWPA U1.”
{Carry over from 2012 amendments}
(29) Subsection R318.1, “Subterranean termite control methods,” of the International
Residential Code is amended to read as follows:
“R318.1 Subterranean termite control methods. [In areas subject to damage from
termites as indicated by Table R301.2(1), protection shall be by one, or a
combination, of the following methods:] Methods of protection shall be one of items
1, 2 or 3 and one of items 4, 5, or 6.
1. Chemical termiticide [treatment in accordance with], as provided in Section
R318.2.
2. Termite-baiting system installed and maintained [in accordance with]
according to the label.
3. Physical barriers, [in accordance with] as provided in Section R318.3 and used
in locations as specified in Section R317.1.
4. Pressure-preservative-treated wood in accordance with [the provisions of]
Section R317.1.
[4. Naturally durable termite-resistant wood.]
5. Physical barriers, in accordance with Section R318.3 and used in locations as
specified in Section R317.1.
6.]5. Cold-formed steel framing in accordance with Sections R505.2.1 and
R603.2.1.
6. Naturally durable termite-resistant wood as approved by the building official.”
{ SRC (18)}
(30) Subsection R318.4, “Foam plastic protection,” of the International Residential Code
is amended to read as follows:
“R318.4 Foam plastic protection. [In areas where the probability of termite
infestation is “very heavy” as indicted in Figure R301.2(7), extruded] Extruded and
expanded polystyrene, polyisocyanurate and other foam plastics shall not be installed
26
on the exterior face or under interior or exterior foundation walls or slab foundations
located below grade. The clearance between foam plastics installed above grade and
exposed earth shall not be [not] less than 6 inches (152mm).
[Exceptions] Exception:
[1. Buildings where the structural members of walls, floors, ceilings and roofs are
entirely of noncombustible materials or pressure-preservative-treated wood.
2. Where in addition to the requirements of Section R318.1, an approved method
of protecting the foam plastic and structure from subterranean termite damage is
used.
3] On the interior side of basement walls.”
{SRC (19)}
(31) Section R318, “Protection Against Subterranean Termites,” of the International
Residential Code is amended by adding Subsection R318.5, “Water splash,” to read
as follows:
“R318.5 Water splash. Where wood-frame walls and partitions are covered on the
interior with plaster, tile or similar materials and are subject to water splash, the
framing shall be protected with approved waterproof paper.”
{SRC (20)}
(32) Section R318, “Protection Against Subterranean Termites,” of the International
Residential Code is amended by adding Subsection R318.6, “Pipe and other
penetrations,” to read as follows:
“R318.6 Pipe and other penetrations. Insulations around plumbing pipes shall not
pass through ground floor slabs. Openings around pipes or similar penetrations in a
concrete or masonry slab, which is in direct contact with earth, shall be filled with
non-shrink grout, or other approved physical barrier.”
{SRC (21)}
(33) Subsection R320.1, “Scope,” of the International Residential Code is amended to read
as follows:
“R320.1 Scope. Where there are four or more dwelling units or sleeping
units in a single structure, the following provisions [of Chapter 11 of the International
Building Code] for Group R-3 [shall] apply:
1. For construction of buildings or facilities of the State and County governments,
compliance with Section 103-50, Hawai‘i Revised Statutes, administered by the
Disability and Communication Access Board, State of Hawai‘i .
2. Department of Justice’s Americans with Disabilities Act Standards for Accessible
Design.
27
3. Housing and urban development recognized “safe harbors” for compliance with
the Fair Housing Acts design and construction requirements.
4. Other pertinent laws relating with disabilities shall be administered and enforced
by agencies responsible for their enforcement.
Prior to the issuance of a building permit, the owner (or the owner's representative,
professional architect, or engineer), shall submit a statement that all requirements
relating to accessibility for persons with disabilities will be complied with.
{for consistency with SBC(20) 2018 Proposed Amendments}
(34) Subsection R322.2, “Flood hazard areas (including A Zones),” of the International
Residential Code is amended to read as follows:
“R322.2 Flood hazard areas (including A Zones). [All areas that have been
determined to be prone to flooding and that are not subject to high-velocity wave
action shall be designated as flood hazard areas. Flood hazard areas that have been
delineated as subject to wave heights between 1-1/2 feet (457 mm) and 3 feet (914
mm) or otherwise designated by the jurisdiction shall be designated as Coastal A
Zones and are subject to the requirements of section R322.3. Buildings and structures
constructed in whole or in part in flood hazard areas shall be designed and
constructed in accordance with Sections R322.2.1 through R322.2.3.] Buildings
located within areas of special flood hazards pursuant to Chapter 27, Hawai‘i County
Code, shall be designed and constructed in accordance with Chapter 27, Hawai‘i
County Code.”
{from Oahu Amendment.}
(35) Section R323, “Storm Shelters” of the International Residential Code, is amended to
read as follows:
“SECTION R323
[STORM SHELTERS] HAWAI‘I RESIDENTIAL SAFE ROOMS
R323.1 General. This section applies to storm shelters where constructed as separate
detached buildings or where constructed as safe rooms within buildings for the
purpose of providing refuge from storms that produce high winds, such as tornados
and hurricanes. In addition to other applicable requirements in this code, storm
shelters shall be constructed in accordance with ICC/NSSA-500 or Subsection
R323.2.
R323.2 Performance-based design criteria. The residential safe room
shall meet the minimum performance specifications of Sections 323.2.1
through 323.11.
28
R323.2.1 Intent and scope. The intent of the residential safe room is to
temporarily provide an enhanced protection area, fully enclosed within a
dwelling or within an accessory structure to a residence, which is designed
and constructed to withstand the wind pressures, windborne debris impacts,
and other requirements of this section.
R323.2.2 Alternative standards.
1. Manufactured safe room designs subject to approval. A
manufactured safe room or safe room kit may be substituted if
documentation is submitted and approved by the building official.
The safe room shall be engineered, tested, and manufactured to meet
or exceed the criteria of this section.
2. FEMA in-residence shelter designs permitted. It shall be permissible
to build FEMA In-Residence Shelters of up to 64 square feet of floor
area with walls up to 8 feet long that are built in accordance with
construction details of FEMA 320.
R323.3 Site criteria. Residential safe rooms shall not be constructed
within areas subject to stream flooding, coastal flooding or dam failure
inundation within any of the following areas:
1. FEMA Special Flood Hazard Areas (SFHA) subject to rainfall runoff
flooding or stream or flash flooding;
2. Coastal zones “V” or “A” identified in the Flood Insurance Rate Map
(FIRM) issued by FEMA for floodplain management purposes, in
which the flood hazard are tides, storm surge, waves, tsunamis, or a
combination of these hazards;
3. Areas subject to dam failure inundation as determined by the
Department of Land and Natural Resources.
R323.4 Size of safe room. The safe room shall be designed to provide a
minimum of 15 square feet per person in a room which does not need to
exceed 120 square feet (11 m2) of floor area.
R323.5 Provisions for exiting. The safe room shall be equipped with an
inward-swinging interior door and an impact-protected operable window or
exterior door suitable for a means of alternative exiting in an emergency.
R323.6 Design for dead, live, wind, rain, and impact loads.
R323.6.1 Structural integrity criteria.
1. The residential safe room shall be built with a complete structural
system and a complete load path for vertical and lateral loads caused
by gravity and wind.
2. The building that the residential safe room is in shall be assumed to
be destroyed by the storm and shall not be taken as offering any
protective shielding to the safe room enclosure.
29
3. The ceiling structure and wall shall be capable of supporting a
superimposed debris load of the full weight of any building floors and
roof above, but not less than 125 psf.
4. The residential safe room enclosure shall be capable of
simultaneously resisting lateral and uplift wind pressures
corresponding to a 145 mph 3-second peak gust ultimate design wind
speed, determined in accordance with ASCE – 7, Minimum Design
Loads for Buildings and Other Structures. The site exposure factor
shall be based on exposure C or the exposure shown in Figure
R301.2.1.4(a), whichever is the greater. The values for the gust
factor and the directionality factor shall be taken as 0.85.
Topographic wind amplification caused by mountainous terrain shall
be considered in accordance with the building code. Internal pressure
shall be determined in accordance with ASCE – 7.
5. The residential safe room shall be anchored to a foundation system
capable of resisting the above loading conditions.
R323.6.2 Windborne debris impact protection of building enclosure
elements. The entire enclosure of the safe room, including all walls,
ceilings, and openings, fixed or operable windows, and all entry doors into
the safe room, shall meet or exceed Level D requirements of ASTM E
1996 (Table 323.6.1), or be an approved assembly listed in Section
323.6.4. Any wall or ceiling penetration greater than 4 square inches shall
be considered an opening.
Exception: Electrical outlet boxes and interior lighting switches not
penetrating more than 2.5-inches into the interior wall surface and a
plumbing piping or conduit not greater than 1.5-inch in diameter shall be
exempted from this requirement.
R323.6.3 Cyclic pressure loading of glazing and protective systems.
Impact protective systems shall meet the ASTM E 1996 cyclic pressure
requirement for the loading given in Table 323.6.1.
Table 323.6.1
WINDBORNE DEBRIS PROTECTION AND CYCLIC PRESSURE
CRITERIA FOR RESIDENTIAL SAFE ROOMS
ASTM E
1996
Missile
Level
Rating
Debris Missile
Size
Debris
Impact
Speed
Enclosure Wall Ceiling,
and Floor Cyclic Air
Pressure Testing -
maximum inward and
maximum outward
pressures
30
D
2 x 4 weighing 9.0
lb. +/- 0.25 lb., and
with min. length 8
ft. +/- 4-inch
50 ft./sec.
or at least
34 mph
35 psf inward
45 psf outward
R323.6.2 Approved debris impact resistant wall assemblies. The
following methods of wall assembly construction shall be deemed to
comply with Section R323.6.2:
1. 3/4-inch plywood on wood studs spaced at 16 inches on-center with
#8 X 3 inch wood screws at 6 inches on-center.
2. 3/4-inch plywood attached to double studs spaced at 16 inches on-
center with #8 X 3 inch wood screws at 6 inches on-center.
3. 8-1/4 inch cementitious lap siding over 22 gage sheet metal attached
to 350S-162-33 studs spaced at 24 inches on-center.
4. 8-1/4 inch cementitious lap siding attached to 350S-162-33 studs
spaced at 24 inches on-center studs with interior 3/4-inch interior
plywood sheathing.
5. 8-1/4 inch cementitious lap siding attached to 350S-162-33 studs
spaced at 24 inches on-center with 1/2-inch interior 22 gage sheet
metal composite gypsum wallboard.
6. 8-1/4 inch cementitious lap siding attached to 2 inch X 4 inch wood
studs spaced at 16 inches on-center with 1/2-inch interior 22 gage
sheet metal composite gypsum wallboard.
7. 8-1/4 inch cementitious lap siding attached to 2 inch X 4 inch wood
studs spaced at 16 inches on-center with 22 gage sheet metal and 1/2-
inch interior gypsum wallboard.
8. Cementitious lap siding attached to 5/8-inch structural plywood on 2
inch X 4 inch wood studs spaced at 16 inches on-center.
9. Cementitious-panel siding attached to 5/8-inch structural plywood on
2 inch X 4 inch or 362S-137-43 steel studs spaced at 16 inches on-
center.
10. EFS with 1/2-inch dens-glass gold exterior sheathing on 362S-137-43
steel studs spaced at 16 inches on-center and 1/2-inch interior gypsum
wallboard.
11. 24 gage steel sheet (50 ksi) on girts.
12. Concrete with a thickness of 4 inches with reinforcing.
13. Concrete masonry units with a thickness of 6 inches with partial
grouting and reinforcing spaced at 24 inches on-center.
14. Concrete masonry units with a thickness of 8 inches with partial
grouting and reinforcing spaced at 24 inches on-center.
15. Interior or exterior wall with laterally braced 2 inch x 4 inch wood
studs with sheathing on either side of 22 gage sheet metal.
Sheathing shall be attached to studs with fasteners at 6 inches (152 mm) on
center for edge and field fastening.
31
R323.7 Ventilation. The residential safe room shall be naturally
ventilated to allow the enclosure to have approximately one air change
every two hours. This requirement may be satisfied by 12 square inches of
venting per occupant. There shall be at least two operable vents. The
vents shall be protected by a cowling or other device that shall be impact
tested to comply with ASTM E 1996-14 Level D. Alternatively, the room
shall be evaluated to determine if the openings are of sufficient area to
constitute an open or partially enclosed condition as defined in ASCE 7.
R323.8 Communications. The residential safe room shall be equipped
with a phone line and telephone that does not rely on a separate electrical
power outlet. Alternatively, a wireless telephone shall be permitted to rely
on an Uninterruptible Power Supply (UPS) battery device.
R323.9 Construction documents. Construction documents for the
residential safe room shall be directly prepared by a Hawaii licensed
professional structural engineer.
R323.10 Special inspection. The construction or installation of the
residential safe room shall be verified for conformance to the drawings in
accordance with the appropriate requirements of Chapter 17 of the
International Building Code.
R323.11 Notification. The owner of the safe room shall notify the State
Department of Defense and county civil defense agency of the property’s
Tax Map Key or Global Positioning System coordinates.”
{From SBC, Appendix “U”}
(36) Section R401, “General,” of the International Residential Code, is amended by adding
subsection R401.5, “Post or pier foundations,” to read as follows:
“R401.5 Post or pier foundations. Raised floor systems supported by post or pier
foundations shall be designed in accordance with the Building Code, Chapter 5A,
Hawai‘i County Code.”
{SRC (22).}
(37) Subsection R402.2.1, “Materials for concrete,” of the International Residential Code
is amended to read as follows:
“R402.2.1 Materials for concrete. Materials for concrete shall comply with the
requirements of Section R608.5.1. The maximum water to cement ratio for concrete
slabs-on-grade shall not exceed 0.50.”
{SRC (23)}
(38) Section R403, “Footings,” of the International Residential Code is amended by
adding subsection R403.1.6.2, “Concrete strap type anchors,” to read as follows:
32
“R403.1.6.2 Concrete strap-type anchors. Concrete strap-type anchors
made out of cold-formed steel shall not be used along the perimeter edges of a slab-
on-grade where the steel does not have at least 1-1/2 inches side cover or other
adequate protection.”
{SRC (24)}
(39) Section R403, “Footings,” of the International Residential Code is amended by
adding subsection R403.1.6.3, “Anchor bolts at the perimeter edge of a slab on
grade,” to read as follows:
“R403.1.6.3 Anchor bolts at the perimeter edge of a slab-on-grade.
Anchor bolts must be hot dipped galvanized in accordance with ASTM
F2329 and have a minimum concrete side cover of 1-1/2 inches unless
provisions have been made to protect the anchor bolts from corrosion.”
{SRC (25)}
(40) Subsection R406.1, “Concrete and masonry foundation dampproofing,” of the
International Residential Code is deleted in its entirety.
{SRC (26)}
(41) Subsection R406.2, “Concrete and masonry foundation waterproofing,” of the
International Residential Code is amended to read as follows:
“R406.2 Concrete and masonry foundation waterproofing. [In areas where a high
water table or other severe soil-water conditions are known to exist, exterior] Exterior
foundation walls that retain earth and enclose interior spaces and floors below grade
shall be waterproofed from [the higher of (a)] the top of the footing [or (b) 6 inches
(152 mm below the top of the basement floor,] to the finished grade. Walls shall be
waterproofed in accordance with one of the following:
1. Two-ply hot-mopped felts.
2. Fifty-five-pound (25 kg) roll roofing.
[3. Six-mil (0.15 mm) polyvinyl chloride.
4. Six-mil (0.15 mm) polyethylene.
5.]3. Forty-mil (1 mm) polymer-modified asphalt.
[6.]4. Sixty-mil (1.5 mm) flexible polymer cement.
[7.]5. One-eighth-inch (3 mm) cement-based, fiber-reinforced, waterproof coating.
[8.]6. Sixty-mil [(0.22 mm)] (1.5 mm) solvent-free liquid-applied synthetic rubber.
All joints in membrane waterproofing shall be lapped and sealed with an adhesive
compatible with the membrane.
Exception: Organic-solvent-based products such as hydrocarbons, chlorinated
hydrocarbons, ketones and esters shall not be used for ICF walls with expanded
polystyrene form material. Use of plastic roofing cements, acrylic coatings, latex
coatings, mortars and pargings to seal ICF walls is permitted. Cold-setting asphalt
33
or hot asphalt shall conform to type C of ASTM D 449. Hot asphalt shall be
applied at a temperature of less than 200°F (93°C).”
{ SRC (27)}
(42) Subsection R406.3, “Dampproofing for wood foundations,” of the International
Residential Code is amended to read as follows:
“R406.3 [Dampproofing] Waterproofing for wood foundations. Wood
foundations enclosing habitable or usable spaces located below grade shall be
[dampproofed] waterproofed in accordance with [Sections R406.3.1 through
R406.3.4] Section R406.2.”
{SRC (28).}
(43) Subsection R406.3.2, “Below-grade moisture barrier,” of the International Residential
Code is amended to read as follows:
“R406.3.2 Below-grade [moisture barrier] waterproofing. [A 6-mil-thick (0.15
mm) polyethylene film] One of the waterproofing systems listed in R406.2 shall be
applied over the below-grade portion of exterior foundation walls prior to backfilling.
[Joints in the polyethylene film shall be lapped 6 inches (152 mm) and sealed with
adhesive.] The top edge of the [polyethylene film] waterproofing shall be bonded to
the sheathing to form a seal. Film areas at grade level shall be protected from
mechanical damage and exposure by a pressure-preservative treated lumber or
plywood strip attached to the wall several inches above finished grade level and
extending approximately 9 inches (229 mm) below grade. The joint between the strip
and the wall shall be caulked full length prior to fastening the strip to the wall.
[Where approved, other] Other coverings appropriate to the architectural treatment
[shall be permitted to] may also be used. The [polyethylene film] waterproofing shall
extend down to the bottom of the wood footing plate but shall not overlap or extend
into the gravel or crushed stone footing.”
{SRC (29)}
(44) Subsection R406.4, “Precast concrete foundation system dampproofing,” of the
International Residential Code is deleted in its entirety.
{SRC (30)}
(45) Section R406, “Foundation Waterproofing and Damp-proofing,” of the International
Residential Code is amended by adding subsection R406.5, “Cold formed steel
protection of sill track,” to read as follows:
“R406.5 Cold formed steel protection of sill track. Cold formed steel framing sills
that directly bear on concrete or masonry that is in direct contact with earth shall be
shielded along the exterior flange and bottom of the sill track with a self-adhered
rubberized asphalt flashing material with a minimum thickness of 25 mil (0.64 mm)
or other moisture barrier conforming to ASTM D412, D570, and E96/E96M.”
{SRC (31)}
34
(46) Section R408, “Under-Floor Space,” of the International Residential Code is amended
by adding subsection R408.8, “Under-floor clearance,” to read as follows:
“R408.8 Under-Floor Clearance. Minimum clearance between the bottom of floor
joists or bottom of floors without joists and the ground beneath is 24 inches (610
mm); the minimum clearance between the bottom of girders and the ground is 18
inches (457 mm).
Exception: Open slat wood decks must have ground clearance of at
least 6 inches (152 mm) for any wood member.”
{from Current Ch 5 building code Amendment (31) 2304.11.6}
(47) Subsection R602.10.9, “Braced wall panel support,” of the International Residential
Code shall be amended to read as follows:
“R602.10.9 Braced wall panel support. Braced wall panel support shall be provided
as follows:
1. Cantilevered floor joists complying with Section R502.3.3 shall be permitted to
support braced wall panels.
2. Raised floor system post or pier foundations supporting braced wall panels shall
be designed in accordance with [accepted engineering practice] the Building
Code, Chapter 5A, Hawai‘i County Code.
3. Masonry stem walls with a length of 48 inches (1219 mm) or less supporting
braced wall panels shall be reinforced in accordance with Figure R602.10.9.
Masonry stem walls with a length greater than 48 inches (1219 mm) supporting
braced wall panels shall be constructed in accordance with Section R403.1
Methods ABW and PFH shall not be permitted to attach to masonry stem walls.
4. Concrete stem walls with a length of 48 inches (1219 mm) or less, greater than 12
inches (305 mm) tall and less than 6 inches (152 mm) thick shall have
reinforcement sized and located in accordance with Figure R602.10.9.”
{from State IRC Amendment, SRC (32)}
(48) Subsection R806.1, “Ventilation required,” of the International Residential Code is
amended to read as follows:
“R806.1 Ventilation required. Enclosed attics and enclosed rafter spaces
formed where ceilings are applied directly to the underside of roof rafters
shall have cross ventilation for each separate space by ventilating openings
protected against the entrance of rain or snow. Ventilation openings shall
have a least dimension of 1/16 inch (1.6 mm) minimum and 1/4 inch (6.4
mm) maximum. Ventilation openings having a least dimension larger than
1/4 inch (6.4 mm) shall be provided with corrosion-resistant wire cloth
screening, hardware cloth, perforated vinyl or similar material with
openings having a least dimension of 1/16 inch (1.6 mm) minimum and 1/4
inch (6.4 mm) maximum. Openings in roof framing members shall
35
conform to the requirements of Section R802.7. Required ventilation
openings shall open directly to the outside air and shall be protected to
prevent the entry of birds, rodents, snakes and other similar creatures.
Exception: The attic space shall be permitted to be unvented when the
design professional determines it would be beneficial to eliminate
ventilation openings to reduce salt-laden air and maintain relative humidity
60 percent or lower to:
1. Avoid corrosion to steel components;
2. Avoid moisture condensation in the attic space; or
3. Minimize energy consumption for air conditioning or ventilation by
maintaining satisfactory space conditions in both the attic and
occupied space below.”
{from existing Ch 5 building code amendment (16) 5A 1203.2.2}
(49) Chapter 11, “Energy Efficiency,” of the International Residential Code is deleted in
its entirety. Refer to the Energy Conservation Code, Chapter 5E, Hawai‘i County
Code.
{SRC (33)}
(50) Subsection M1301.1, “Scope,” of the International Residential Code shall be
amended to read as follows:
“M1301.1 Scope. The provisions of this chapter shall govern the installation of
mechanical systems not specifically covered in other chapters applicable to
mechanical systems. Installations of mechanical appliances, equipment and systems
not addressed by this code shall comply with the applicable provisions of [the
International Mechanical Code and the International Fuel Gas Code] nationally
published codes or standards and with the Plumbing Code, Chapter 5F, Hawai‘i
County Code.
{SRC 35}
(51) Subsection M1307.4.2, “Mechanical ventilation,” of the International Residential
Code shall be amended to read as follows:
“M1307.4.2 Mechanical ventilation. Indoor locations intended for hydrogen-
generating or refueling operations shall be ventilated in accordance with [Section
502.16 of the International Mechanical Code. In these locations, equipment and
appliances having an ignition source shall be located so that the source of ignition is
below the mechanical ventilation outlet(s).] the applicable provisions of nationally
published mechanical codes or standards.”
{SRC 36.}
(52) Subsection M1901.1, “Clearances,” of the International Residential Code shall be
amended to read as follows:
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“M1901.1 Clearances. Freestanding or built-in ranges shall have a vertical clearance
above the cooking top of not less than 30 inches (762 mm) to unprotected
combustible material. Reduced clearances are permitted in accordance with the listing
and labeling of the range hoods or ovens with integral exhaust. The clearances for a
domestic open-top broiler unit shall be in accordance with Section M1503.2.1.
Minimum Horizontal Clearance. The minimum horizontal clearance
from edge of the burner head(s) of top (or surface) cooking unit to
combustible walls extending above the cooking surface shall be not less
than 12 inches.
Exception: Walls of combustible materials to be installed within 12 inches
of a cooking unit shall be provided with protection equivalent to 1/2-inch
gypsum wallboard covered with laminated plastic. The height of the
laminated plastic shall be 12 inch minimum.”
{proposed COH amendment per existing HCC ch 5A 310.3.12}
(53) Chapter 20, “Boilers and Water Heaters,” of the International Residential Code is
deleted in its entirety and replaced with provisions relating to water heaters in the
Plumbing code, Chapter 5F, Hawai‘i County Code.
{SRC (45).}
(54) Chapter 21, “Hydronic Piping,” of the International Residential Code is amended by
amending its title to read as follows:
“CHAPTER 21
HYDRONIC PIPING
(FOR REFERENCE ONLY)”
{proposed COH amendment that relates to SRC (46) that deleted this chapter}
(55) Chapter 21, “Hydronic Piping,” of the International Residential Code is amended by
adding a section M2100, “Reference,” to read as follows:
“Section M2100 Reference. The provisions of this chapter shall be deemed to be
guidelines only and not mandatory.”
{proposed COH amendment that relates to SRC (46) that deleted this chapter}
(56) Chapter 22, “Special Piping and Storage Systems,” of the International Residential
Code is amended by amending its title to read as follows:
“CHAPTER 22
SPECIAL PIPING AND STORAGE SYSTEMS
(FOR REFERENCE ONLY)”
{proposed COH amendment that relates to SRC (47) that deleted this chapter.}
37
(57) Chapter 22, “Special Piping and Storage Systems,” of the International Residential
Code is amended by adding a section M2200, “Reference,” to read as follows:
“Section M2200 Reference. The provisions of this chapter shall be deemed to be
guidelines only and not mandatory.”
{proposed COH amendment to SRC (47) that deleted this chapter.}
(58) Chapter 23, “Solar Energy Systems,” of the International Residential Code is deleted
in its entirety. Refer to the Electrical Code, Chapter 5D, Hawai‘i County Code and
the Plumbing Code, Chapter 5F, Hawai‘i County Code.”
{See instead Chapter 5D, “Electrical Code” and Chapter 5F, “Plumbing Code.”}
(59) Chapter 24, “Fuel Gas,” of the International Residential Code is deleted in its entirety.
Refer to the Plumbing Code, Chapter 5F, Hawai‘i County Code.”
{SRC (48). See instead Chapter 5F, “Plumbing Code.”}
(60) Chapters 25 through 32 that are contained in Part VII, “Plumbing,” of the
International Residential Code are deleted in their entirety. Refer to the Plumbing
Code, Chapter 5F, Hawai‘i County Code.”{SRC (49) through (56) delete these
chapts. See instead Chapter 5F, “Plumbing Code.”}
(61) Chapter 33, “Storm Drainage,” of the International Residential Code is deleted in its
entirety.
{SRC (57)}
(62) Chapters 34 thru 43 that are contained in Part VIII, “Electrical,” of the International
Residential Code are deleted in their entirety. Refer to the Electrical Code, Chapter
5D, Hawai‘i County Code.”{SRC (58) and (59) delete chapts 31 through 42. See
instead Chapter 5E, “Electrical Code.”}
Article 3. Adoption, Amendment, and Addition of Appendices.
Division 1. Appendices of International Residential Code Adopted.
Section 5B-3-1. Appendices not applicable.
Provisions in the appendices of the International Residential Code shall not apply unless
specifically adopted.
Section 5B-3-2. Appendices of the International Residential Code adopted.
The following appendices of the International Residential Code are hereby adopted and
incorporated by reference herein and made a part of this code, subject to the amendments
hereinafter set forth in this article:
(1) Appendix H, Patio Covers;
(2) Appendix M, Home Day Care – R-3 Occupancy; and
(3) Appendix Q, Tiny Houses.
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Section 5B-3-3. Appendix Q; Tiny Houses.
Appendix Q is deleted in its entirety and replaced with the following:
“APPENDIX Q
TINY HOUSES
SECTION AQ101
GENERAL
AQ101.1 Scope. This appendix shall be applicable to tiny houses
used as single dwelling units and tiny houses that contain a loft. Tiny
houses shall comply with the International Residential Code except
as otherwise stated in this appendix.
AQ101.1.1 Limitations. Tiny houses shall not contain more than
one loft, or loft space. Tiny houses that contain a loft may not be used
for any purpose other than as a detached single-family dwelling.
SECTION AQ102
DEFINITIONS
AQ102.1 General. The following words and terms shall, for the
purposes of this appendix, have the meanings shown herein. Refer to
Chapter 2 of the International Residential Code for general
definitions.
EGRESS ROOF ACCESS WINDOW. A skylight or roof window
designed and installed to satisfy the emergency escape and rescue
opening requirements in Section R310.2.
LANDING PLATFORM. A landing measuring two treads deep and
two risers tall, provided as the top step of a stairway accessing a loft.
LOFT. Any floor level located above the main floor and open to it
on at least one side, with a ceiling height less than 6 feet 8 inches
(2032 mm), complying with the area, access, and guard requirements
of Section AQ105, and used as a living or sleeping space.
TINY HOUSE. A dwelling which is 500 square feet (37m2) or less
in floor area excluding lofts. The maximum total floor area of 500
square feet shall mean the sum of the horizontal areas of each floor
of a building measured from the exterior faces of the exterior walls.
The total floor area shall include enclosed attached accessory
structures such as garages or storage areas. Unenclosed attached
structures such as carports, breezeways, lanais, or porches shall be
excluded.
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SECTION AQ103
FOUNDATIONS
AQ103.1 General. All exterior walls shall be permanently
supported on continuous solid or fully grouted masonry or concrete
footings, crushed stone footings, wood foundations, or other
approved structural systems pursuant to Chapter 4 of the
International Residential Code, which shall be of sufficient design to
accommodate all loads according to Section R301 and to transmit
the resulting loads to the soil within the limitations as determined
from the character of the soil. Footings shall be supported on
undisturbed natural soils or engineered fill.
SECTION AQ104
CEILING HEIGHT
AQ104.1 Minimum ceiling height. Habitable space and hallways in
tiny houses shall have a ceiling height not less than 6 feet 8 inches
(2032 mm). Bathrooms, toilet rooms, and kitchens shall have a
ceiling height not less than 6 feet 4 inches (1930 mm). No
obstructions shall extend below these minimum ceiling heights
including beams, girders, ducts, lighting, or other obstructions.
Exception: Ceiling heights in lofts are permitted to be less than 6 foot
8 inches (2032 mm).
SECTION AQ105
LOFTS
AQ105.1 Minimum loft areas. Lofts used as a sleeping or living
space shall meet the minimum area and dimension requirements of
Sections AQ105.1.1 through AQ105.1.3.
AQ105.1.1 Minimum area. Lofts shall have a floor area of not less
than 35 square feet (3.25 m2).
AQ105.1.2 Minimum dimensions. Lofts shall be not less than 5 feet
(1524 mm) in any horizontal dimension.
AQ105.1.3 Height effect on loft area. Portions of a loft with a
sloping ceiling measuring less than 3 feet (914 mm) from the
finished floor to the finished ceiling shall not be considered as
contributing to the minimum required area for the loft.
40
Exception: Under gable roofs with a minimum slope of 6:12,
portions of a loft with a sloping ceiling measuring less than 16 inches
(406 mm) from the finished floor to the finished ceiling shall not be
considered as contributing to the minimum required area for the loft.
AQ105.1.4 Minimum ceiling height. Lofts shall have a ceiling
height of not less than 3 feet (914.4 mm).
AQ105.1.4.4.1 Undersized lofts. Lofts having a ceiling height of
less than 6 feet (1828.8 mm) for more than 50 percent of the required
minimum area shall comply with both of the following:
1. All wall and ceiling of the dwelling unit shall be a minimum
1/2 inch gypsum board or other approved Class A finish,
throughout the entire dwelling unit.
2. In addition to the loft smoke alarm required by AQ105.4, all
other required smoke alarms within the dwelling unit shall be
a photoelectric-type complying with R314.
AQ105.1.5 Maximum loft size. The aggregate floor area of a loft
shall not be greater than one-third of the floor area of the room or
space in which they are located.
AQ105.2 Loft access. The access to and primary egress from lofts
shall be of any type described in Sections AQ105.2.1 through
AQ105.2.4. All methods of loft access and egress shall be positively
anchored to prevent displacement.
AQ105.2.1 Stairways. Stairways accessing lofts shall comply with
this code or with Sections AQ105.2.1.1 through AQ105.2.1.5.
AQ105.2.1.1 Width. Stairways accessing a loft shall not be less than
17 inches (432 mm) in clear width at all points at or above the
permitted handrail height. The minimum width below the handrail
shall not be less than 20 inches (508 mm).
AQ105.2.1.2 Headroom. The headroom in stairways accessing a
loft shall not be less than 6 feet 2 inches (1880 mm) measured
vertically from the sloped line connecting the tread nosing in the
middle of the tread width.
Exception: The headroom for landing platforms shall not be less
than 4 feet 6 inches (1372 mm).
AQ105.2.1.3 Treads and Risers. Risers for stairs accessing a loft
shall be a minimum of 7 inches (178 mm) and a maximum of 12
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inches (305 mm). Tread depth and riser height shall be calculated
with the following formulas:
Tread depth = 20 inches (508 mm) minus 4/3 riser height
or
Riser height = 15 inches (381 mm) minus 3/4 tread depth
Exception: Landing platforms shall measure two treads deep and
two risers tall.
AQ105.2.1.4 Handrails. Handrails shall comply with Section
R311.7.8.
AQ105.2.1.5 Stairway guards. Guards at open sides of stairways
shall comply with Section R312.1.
AQ105.2.2 Ladders. Ladders accessing lofts shall comply with
Sections AQ105.2.2.1 and AQ105.2.2.2.
AQ105.2.2.1 Size and capacity. Ladders accessing lofts shall have
12 inches (305 mm) minimum rung width and 10 inches (254 mm)
to 14 inch (356 mm) spacing between rungs. Ladders shall be
capable of supporting a 300 pound (136 kg) load on any rung. Rung
spacing shall be uniform within 3/8-inch (9.5 mm). The maximum
height of a ladder shall be 8 feet (2438 mm).
AQ105.2.2.2 Incline. Ladders shall be installed at 70 to 80 degrees
from horizontal.
AQ105.2.3 Alternating tread devices. Alternating tread devices
accessing lofts 200 square feet or less shall comply with Sections
R311.7.11.1 and R311.7.11.2. The clear width at and below the
handrails shall be not less than 20 inches (508 mm).
Y105.2.4 Ships ladders. Ships ladders accessing lofts 200 square
feet or less shall comply with Sections R311.7.12.1 and R311.7.12.2.
The clear width at and below the handrails shall be not less than 20
inches (508 mm).
Y105.3 Loft guards. Loft guards shall be located along the open
side(s) of lofts located more than 30 inches (762 mm) above the
main floor. Loft guards shall be not less than 36 inches (914 mm) in
height or one-half the clear height to the ceiling, whichever is less.
Loft guards are not required at the loft accessing means connection
to the loft.
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Y105.4 Loft smoke alarms. Lofts shall be equipped with a
minimum of one photoelectric-type smoke alarm complying with
Section R314.
Y105.5 Loft location. Lofts shall not be located directly above a
permanently installed cooking appliance. Permanently installed
cooking appliances shall not be located within 12 inches (304.8 mm)
horizontally of a loft open edge, measured to the vertical plane of the
loft edge.
SECTION Y106
EMERGENCY ESCAPE AND RESCUE OPENINGS
Y106.1 General. Tiny houses shall meet the requirements of Section
R310 for emergency escape and rescue openings.
Exception: Egress roof access windows in lofts used as sleeping
rooms shall be deemed to meet the requirements of Section R310
where installed with the bottom of their clear opening no more than
44 inches (1118 mm) above the loft floor provided the egress roof
access window complies with the minimum opening area
requirements of Section R310.2.1.”
Division 2. Appendix Added to the International Residential Code.
Section 5B-3-21. Appendix added to International Residential Code.
The following appendix is hereby added to the International Residential Code and made a
part of this code, as set forth in full in this article: Appendix L, Factory-built Homes. {Removed
appendices U, W, and Y}
Section 5B-3-22. Appendix L; Factory-built Housing.
Appendix L is added to read as follows:
“APPENDIX L
FACTORY-BUILT HOUSING
SECTION L101
APPLICABILITY
L101.1 Purpose. These provisions are applicable to the design,
construction, installation, and transportation of factory-built housing
within the County. Unless otherwise specified this article shall be
applicable only to factory-built housing which is sold or offered for
sale to first users as defined below.
43
Exception: Manufactured homes manufactured and certified in
accordance with the Manufactured Home Construction and Safety
Standards as promulgated by the United States Department of
Housing and Urban Development. Foundation, exterior stairs,
additions and accessory structures shall comply with Article 1,
Adoption of the International Building Code and International
Residential Code for One- and Two-Family Dwellings.
All provisions of the building, housing, electrical, and plumbing
codes shall be applicable unless indicated otherwise in this article.
L101.2 Definitions. The following terms are defined for specialized
use within this article:
“Building official” means the director of the department of public
works or the director’s authorized representative.
“Factory-built housing” means any structure or portion thereof
designed primarily for residential occupancy by human beings, which
is either entirely prefabricated or assembled at a place other than the
building site.
“First user” means a person, firm or corporation who initially installs
factory-built housing within this State. A person who subsequently
purchases an installed factory-built housing is not a first user within
the meaning of this definition.
“Insignia of approval” means a tag, tab, stamp, label or other device
issued by the building official to indicate compliance with the statutes
and these rules.
“Installation” means the assembly of factory-built housing on site and
the process of affixing factory-built housing to land, a foundation or
an existing building.
“Manufacture” means the process of making, fabricating,
constructing, forming, or assembling factory-built housing at a place
other than the building site.
“Site” means the parcel of land on which factory-built housing is
installed.
L101.3 Building permit required.
(a) No person shall perform any of the following work or cause or
permit the same to be done on any factory-built housing in the
44
County, without first obtaining a permit for this work from the
building official:
(1) Manufacture, install, erect, construct, enlarge, alter, repair,
relocate, improve, remove, convert, or demolish any
factory-built housing;
(2) Manufacture, erect, install, enlarge, alter, repair, remove,
convert, or replace any electrical work; or
(3) Manufacture, erect, install, enlarge, alter, repair, remove,
convert, or replace any plumbing, fire sprinkler, gas, or
drainage piping work, or any fixture, gas appliance, water
heating, or water treating equipment.
(b) To obtain a permit, an applicant shall comply with sections: 5-
4-1; 5-4-2, 5-4-3, 5-4-4, 5-4-5, 5-4-6, 5-4-7, and 5-4-8.
L101.4 Building permit fee. A fee for each building permit as set
forth in section 5-7-3 of chapter 5, shall be paid to the building
official.
L101.5 Insignia of approval.
(a) Factory-built housing manufactured in this County which is
sold or offered for sale to first users within this County shall
bear the insignia of approval issued by the building official
indicating that the factory-built housing is in compliance with
this article.
(b) Factory-built housing manufactured outside the County shall
bear the insignia of approval issued by any governmental or
inspectional agency approved by the building official.
L101.6 Performance of building, electrical, and plumbing work
(a) All building, electrical, and plumbing work performed within
the State of Hawai‘i shall comply with State of Hawai‘i
contracting and licensing laws and regulations.
(b) All building, electrical, and plumbing work to be performed at
the factory outside of this state must be accomplished:
(1) Under the supervision of a licensed building contractor,
licensed supervising electrician, or master plumber,
respectively, of the state in which the factory is located, if
the manufacturer submits a quality control manual which
is approved by the building official; or
45
(2) By licensed building contractors, electricians, or
plumbers, respectively, of the state in which the factory is
located.
L101.7 Inspections.
(a) Each and every factory-built housing manufactured outside of
this County shall be inspected by a governmental or
inspectional agency approved by the building official in
conformance with the quality assurance standards approved by
the building official and in compliance with County of Hawai‘i
codes and regulations.
(b) All manufacturing work, including building, electrical, and
plumbing, shall be inspected in the factory by the building
official to ensure compliance with the requirements of the
construction code. It shall be the duty of the permit holder or
their agent, to cause the work to remain accessible and exposed
for inspection purposes. All inspections of factory-built
housing shall comply with sections 5-8-1, 5-8-2, 5-8-3, 5-8-4,
5-8-5, 5-8-6, and 5-8-7.
L101.8 Manufacturer’s label.
(a) Each and every factory-built housing manufactured outside of
this County shall have a manufacturer’s label on a metal plate
showing the manufacturer’s name, serial number of the
building, manufacture date, design load criteria, and an
inspection stamp by a governmental or inspectional agency
approved by the building official securely fastened on the
factory-built housing;
(b) Each and every factory-built housing manufactured in the
County of Hawai‘i shall have a manufacturer’s label on a metal
plate showing the manufacturer’s name, serial number of the
building, manufacture date, design load criteria, and building
official inspection stamp securely fastened on the factory-built
housing.
L101.9 Transporting factory-built housing. The transportation of
factory-built housing shall be governed by the provisions of the
County and State traffic codes.”
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Article 4. Building Work Within Special Flood Hazard Areas.
Section 5B-4-1. General applicability.
(a) The provisions of this article shall apply to new construction or the renovation and major
alteration, addition, or reinstallation of any existing buildings or structures, within a special
flood hazard area as identified by chapter 27, Hawai‘i County Code. Such construction
work shall comply with chapter 16 of the International Building Code, and chapter 27,
Floodplain Management.
(b) The provisions of this article shall not apply to the following:
(1) Any building or structure exempted from chapter 27;
(2) Any building or structure which has been granted a flood control variance pursuant to
article 5, chapter 27; or
(3) Any building or structure lawfully existing prior to November 8, 1993, subject to the
provisions of chapter 27.
Section 5B-4-2. Definitions.
As used in this article, unless it is apparent from the context that a different meaning is
intended:
“Base flood elevation” means the water surface elevation of the base flood.
“Flood or flooding” means:
(1) A general and temporary condition of partial or complete inundation of normally dry
land areas from:
(A) The overflow of inland or tidal waters;
(B) The unusual and rapid accumulation or runoff of surface waters from any
source; or
(C) Mudslides (i.e., mudflows) which are approximately caused by flooding as
defined in paragraph (1)(B) of this definition and are akin to a river of liquid
and flowing mud on the surfaces of normally dry land areas, as when earth is
carried by a current of water and deposited along the path of the current; or
(2) The collapse or subsidence of land along the shore of a lake or other body of water as
a result of erosion or undermining caused by waves or currents of water exceeding
anticipated cyclical levels or suddenly caused by an unusually high water level in a
natural body of water, accompanied by a severe storm, or by an unanticipated force of
nature, such as flash flood or an abnormal tidal surge, or by some similarly unusual
and unforeseeable event which results in flooding as defined in paragraph (1)(A) of
this definition.
“Special flood hazard area” means an area having special flood or flood-related erosion
hazards, and shown on the Flood Insurance Rate Maps as Zones A, AO, AE, A99, AH, VE, or V.
“Water-tight” when referring to construction below the inundation level, means constructed
to exclude moisture and withstand the hydraulic pressure resulting from the anticipated depth of
inundation.
47
Section 5B-4-3. General Requirements.
Contractor will provide a certified flood zone elevation mark on jobsite for flood zone elevation
reference point.”