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HomeMy WebLinkAboutFireBlocking_Stopping Bulletin 161104 pdfPage 1 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer BUILDING DIVISION  DEPARTMENT OF PUBLIC WORKS 101 Pauahi Street, Suite 7, Hilo, Hawai‘i 96720 (808) 961-8331, Fax (808) 961-8410 74-5044 Ane Keohokalole Highway, Building E, Kailua -Kona, Hawaii 96740 (808) 323-4720, Fax (808) 327-3509 INFORMATIONAL BULLETIN: 2016-09-01 DATE: November 16, 2016 CODE/ EDITION: International Building Code 2006 (IBC), International Residential Code 2006 (IRC) SUBJECT: Fireblocking in Concealed Spaces of Combustible Assemblies DISCUSSION: Fireblocking (fireblock) are materials applied to combustible assemblies with objectives to retard airflow from feeding a fire and the free passage of flames, smoke or other products of combustion to other areas through concealed spaces. It is required by code to be applied in concealed locations of combustible assemblies. Not to be confused, firestopping (firestop) is a practice of protecting penetrations that pass through fire-rated assemblies with materials that are approved for use in specific construction details that reflects the installed assemblies and meant to protect the rated penetrations to the same degree as the fire-rated assemblies that were penetrated. CODE DEFINITION: IBC 702.1, IRC R202 - FIREBLOCKING. Building materials installed to resist the free passage of flame to other areas of the building through concealed spaces. CODE SUMMARY: IBC 717.2 FIREBLOCKING. In combustible construction, fireblocking shall be installed to cut off concealed draft openings (both vertical and horizontal) and shall form an effective barrier between floors, between a top story and a roof or attic space. Fireblocking shall be installed in the locations specified in Sections IBC 717.2.2 through IBC 717.2.7. IBC 717.2.1 Fireblocking materials. Fireblocking shall consist of 2-inch'(51 mm) nominal lumber or two thicknesses of I-inch (25 mm) nominal lumber with broken lap joints or one thickness of 0.719-inch (18.3 mm) wood structural panel with joints backed by 0.719-inch (18.3 mm) wood structural panel or one thickness of 0.75-inch (19 mm) particleboard with joints backed by 0.75-inch (19 mm) particleboard. Gypsum board, cement fiber board, batts or blankets of mineral wool, glass fiber or other approved materials installed in such a manner as to be securely retained in place shall be permitted as an acceptable fireblock. Batts or blankets of mineral or glass fiber or other approved nonrigid materials shall be permitted Page 2 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer for compliance with the 10-foot (3048 mm) horizontal fireblocking in walls constructed using parallel rows of studs or staggered studs. Loose-fill insulation material shall not be used as a fireblock unless specifically tested in the form and manner intended for use to demonstrate its ability to remain in place and to retard the spread of fire and hot gases. The integrity of fireblocks shall be maintained. IBC 717.2.1.1 Double stud walls. Batts or blankets of mineral or glass fiber or other approved nonrigid materials shall be allowed as fireblocking in walls constructed using parallel rows of studs or staggered studs. IBC 717.2.2 Concealed wall spaces. Fireblocking shall be provided in concealed spaces of stud walls and partitions, including furred spaces, and parallel rows of studs or staggered studs, as follows: 1. Vertically at the ceiling and floor levels. 2. Horizontally at intervals not exceeding 10 feet (3048 mm). IBC 717.2.3 Connections between horizontal and vertical spaces. Fireblocking shall be provided at interconnections between concealed vertical stud wall or partition spaces and concealed horizontal spaces created by an assembly of floor joists or trusses, and between concealed vertical and horizontal spaces such as occur at soffits, drop ceilings, cove ceilings and similar locations. IBC 717.2.4 Stairways. Fireblocking shall be provided in concealed spaces between stair stringers at the top and bottom of the run. Enclosed spaces under stairs shall also comply with Section 1009.5.3. IBC 717.2.5 Ceiling and floor openings. Where annular space protection is provided in accordance with Exception 6 of Section 707.2, Exception 1 of Section 712.4.1.2, or Section 712.4.2, fireblocking shall be installed at openings around vents, pipes, ducts, chimneys and fireplaces at ceiling and floor levels, with an approved material to resist the free passage of flame and the products of combustion. Factory-built chimneys and fireplaces shall be fireblocked in accordance with UL 103 and UL 127. IBC 717.2.6 Architectural trim. Fireblocking shall be installed within concealed spaces of exterior wall finish and other exterior architectural elements where permitted to be of combustible construction as specified in Section 1406 or where erected with combustible frames, at maximum intervals of 20 feet (6096 mm), so that there will be no open space exceeding 100 square feet (9.3 m3). Where wood furring strips are used, they shall be of approved wood of natural decay resistance or preservative-treated wood. If noncontinuous, such elements shall have closed ends, with at least 4 inches (102 mm) of separation between sections. Exceptions: 1. Fireblocking of cornices is not required in single-family dwellings. Fireblocking of cornices of a two-family dwelling is required only at the line of dwelling unit separation. Page 3 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer 2. Fireblocking shall not be required where installed on noncombustible framing and the face of the exterior wall finish exposed to the concealed space is covered by one of the following materials: 2.1. Aluminum having a minimum thickness of 0.019 inch (0.5 mm). 2.2. Corrosion-resistant steel having a base metal thickness not less than 0.016 inch (0.4 mm) at any point. 2.3. Other approved noncombustible materials. IBC 717.2.7 Concealed sleeper spaces. Where wood sleepers are used for laying wood flooring on masonry or concrete fire-resistance-rated floors, the space between the floor slab and the underside of the wood flooring shall be filled with an approved material to resist the free passage of flame and products of combustion or fireblocked in such a manner that there will be no open spaces under the flooring that will exceed 100 square feet (9.3 m2) in area and such space shall be filled solidly under permanent partitions so that there is no communication under the flooring between adjoining rooms. Exceptions: 1. Fireblocking is not required for slab-on-grade floors in gymnasiums. 2. Fireblocking is required only at the juncture of each alternate lane and at the ends of each lane in a bowling facility. IRC R602.8 Fireblocking required. Fireblocking shall be provided to cut off all concealed draft openings (both vertical and horizontal) and to form an effective fire barrier between stories, and between a top story and the roof space. Fireblocking shall be provided in wood- frame construction in the following locations: 1. In concealed spaces of stud walls and partitions, including furred spaces and parallel rows of studs or staggered studs; as follows: 1.1 Vertically at the ceiling and floor levels. 1.2 Horizontally at intervals not exceeding 10 feet (3048 mm). 2. At all interconnections between concealed vertical and horizontal spaces such as occur at soffits, drop ceilings and cove ceilings. 3. In concealed spaces between stair stringers at the top and bottom of the run. Enclosed spaces under stairs shall comply with Section R311.2.2. 4. At openings around vents, pipes, ducts, cables and wires at ceiling and floor level, with an approved material to resist the free passage of flame and products of combustion. 5. For the fireblocking of chimneys and fireplaces, see Section R1003.19. 6. Fireblocking of cornices of a two-family dwelling is required at the line of dwelling unit separation. IRC R602.8.1 Materials. Except as provided in Section R602.8, Item 4, fireblocking shall consist of 2-inch (51 mm) nominal lumber, or two thicknesses of I-inch (25.4 mm) nominal lumber with broken lap joints, or one thickness of 23/32-inch (19.8 mm) wood structural panels with joints backed by 23/32-inch (19.8 mm) wood structural panels or one thickness of 3/4-inch (19.1 mm) particleboard with joints backed by 3/4-inch (19.1 mm) particleboard, 1/2-inch (12.7 mm) gypsum board, or 1/4-inch (6.4 mm) cement-based millboard. Batts or blankets of mineral wool or glass fiber or other approved materials installed in such a manner Page 4 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer as to be securely retained in place shall be permitted as an acceptable fire block. Batts or blankets of mineral or glass fiber or other approved nonrigid materials shall be permitted for compliance with the 10 foot horizontal fireblocking in walls constructed using parallel rows of studs or staggered studs. Loose-fill insulation material shall not be used as a fire block unless specifically tested in the form and manner intended for use to demonstrate its ability to remain in place and to retard the spread of fire and hot gases. IRC R602.8.1.1 Unfaced fiberglass. Unfaced fiberglass batt insulation used as fireblocking shall fill the entire cross section of the wall cavity to a minimum height of 16 inches (406 mm) measured vertically. When piping, conduit or similar obstructions are encountered; the insulation shall be packed tightly around the obstruction. IRC R602.8.1.2 Fireblocking integrity. The integrity of all fireblocks shall be maintained. REFERENCE: International Code Council Evaluation Service (ICC-ES) ICC-ES Reports - Fireblock: ESL-1058, ESL-1072, ESR-1040, ESR-1269, ESR-1387, ESR-1642, ESR-1926, ESR-1961, ESR-2092, ESR-2179, ESR-2316, ESR-2599, ESR-2909, ESR-3102, ESR-3118, ESR-3263, ESR-3302, ESR-3402, ESR-3466, ESR-3582, ESR-3600, ESR-3758, ESR-3885, ESR-3906. ICC-ES Report # Category Product Manufacturer ESL-1058 Thermal and Moisture Protection and Annular Space Protection 840 Fireblock Insulating Foam Sealant and 840P Insulating Foam Sealant Akkim Yapi Kimyasallari Sanayi ve Ticaret A.S. ESL-1072 Thermal and Moisture Protection and Thermal Insulation Mitee Seal Fireblock Mitex Building Products, LLC ESR-1040 Wood, Plastics and Composites and Laminated veneer Lumber Versa-Lam and Versa-Rim Laminated Veneer Lumber Boise Cascade Wood Products, LLC ESR-1269 Concrete, Insulating Concrete Forming Amvic Standard and Amvic Plus 3.30 Expanded Polystyrene Insulating Concrete Forms (ICFS) Amvic Incorporated. ESR-1387 Wood, Plastics and Composites, Laminated veneer Lumber, Laminated veneer Lumber, Parallel Strand Lumber, Laminated Strand Lumber. Structural Composite Lumber:Timberstrand Laminated Strand Lumber (LSL); Parallam Parallel Strand Lumber(PSL); Microllam Laminated Veneer Lumber (LVL); Timberstrand LSL Rim Board; TJ Rim Board; and Weyerhaeuser Page 5 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer ICC-ES Report # Category Product Manufacturer Weyerhaeuser Rim Board. ESR-1642 Concrete, Insulating Concrete Forming Logix Insulating Concrete Forms Logix Insulated Concrete Forms LTD. ESR-1926 Thermal and Moisture Protection and Annular Space Protection Polyurethane Foam Sealants: Touch'n Seal Gun Foam II/ Touch'n Foam Pro All Purpose Gun Form; Touch'n Seal No Warp/Touch'n Foam Window and Door Foam; Touch'n Seal All Season Gun Foam, Touch'n Seal /Touch'n Foam Firebreak Technology Foam; Touch'n Seal Quick Cure/Touch'n Foam Triple Expansion; Touch'n Seal /Touch'n Foam Pro Quick Cure Canister Foam 10/16/23 Pound Clayton Corporation ESR-1961 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Great Stuff Gaps & Cracks, Great Stuff Multipurpose Black Insulating Foam Sealant, Great Stuff Fireblock, Great Stuff Window & Door, Great Stuff Big Gap Filler, Great Stuff Pro Gaps & Cracks, Contractor Grade Insulating Foam Sealant Gap Filler, Great Stuff Pro Window & Door, Contractor Grade Insulating Form Sealant Door & Window and Enerfoam. The Dow Chemical Company ESR-2092 Concrete, Insulating Concrete Forming Nudura Integrated Building Technology Insulating Concrete Form (ICF) Wall System Nudura Corporation ESR-2179 Thermal and Moisture Protection and Annular Space Protection Hilti CF-AS-CIP All Seasons Crack and Joint Insulation Form and Fireblock Hilti, Inc. ESR-2316 Specialties, Manufactured Fireplaces Isokern Standard Models Fireplace and DM Chimney System: Isokern Magnum Fireplace Series Models; Isokern Fireplace with Fire-Lite Application; Earthcore Industries, LLC ESR-2599 Specialties, Manufactured Fireplaces Fire Rock Modular Refractory Fireplace and Chimney Systems: Fire Rock Fire Rock Products LLC Page 6 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer ICC-ES Report # Category Product Manufacturer Conventional Fireplace Series; Fire Rock B-Vent Fireplace Series Models; Fire Rock Lite- Rock Fireplace Series Models; Fire Rock Vent Fireplace ; Outdoor Fireplace Series Models, and Fire Rock Rumford. ESR-2909 Wood, Plastics and Composites, Laminated veneer Lumber Pacific Woodtech Laminated Veneer Lumber (LVL), and Pacific Woodtech 1 1/4-inchx 1.5 E Rim Board Pacific Woodtech Corporation ESR-3102 Thermal and Moisture Protection and Thermal Insulation Enertite NM and Enertite IB- 418 Open-Cell Spray Polyurethane Foam Insulations BASF Corporation ESR-3118 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Soudafoam Gap & Block Soudal NV ESR-3263 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Triggerfoam Pro Fire Block, Triggerfoam Pro Window and Door, Triggerfoam Pro All Season Foam Sealants Dewalt ESR-3302 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Tytan Professional Fire Block Selena FM S.A ESR-3402 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Red Devil Fireblock Form-N- Fill Red Devil Inc. ESR-3466 Concrete, Insulating Concrete Forming Superform Insulating Concrete Forms (ICFs) Superform Products LTD. ESR-3582 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection Seal Pro Gaps and Cracks Service Partners, LLC ESR-3600 Thermal and Moisture Protection, Thermal Insulation and Annular Space Protection DAP Fireblock Form Polyurethane Form Sealant DAP Products Page 7 of 7 County of Hawai‘i is an Equal Opportunity Provider and Employer ICC-ES Reports - Firestop: ESR-1006, ESR-1255, ESR-2064, ESR-2213, ESR-2224, ER-2331, ESR-2996, ESR-3439, ESR-3462, ESR-3745. ICC-ES Report # Category Product Manufacturer ESR-1006 Thermal and Moisture Protection, Thermal Insulation and Roof and Deck Insulation Foam-Control Boards, Foam-Control with Perform Guard Boards and Foam- control with Perform Guard Boards and Foam-Control Geofoam Blocks AFM Corporation ESR-1255 Thermal and Moisture Protection and Mineral- Fiber Fireproofing 3M Fire Barrier Duct Wrap 615+ Blanket for Grease Duct Enclosure Assemblies 3M Fire Protection Products ESR-2064 Thermal and Moisture Protection, Exterior Insulation and Finish Systems and Water- Drainage Exterior insulation and Finish System Akroflex Barrier, Akroflex Water Managed (WW), and Akroflex Water Managed Plus (MM+) Exterior Insulation and Finish System (EIFS) Omega Products International, Inc. ESR-2213 Thermal and Moisture Protection and Mineral- Fiber Fireproofing Firemaster Fastwrap XL Fire Protection System for Grease Ducts Thermal Ceramics, Inc. ESR-2224 Thermal and Moisture Protection and Mineral- Fiber Fireproofing Fyrewrap Elite 1.5 and Max 2.0 Grease Duct Enclosure Assemblies Unifrax I LLC ER-2331 Insulation Thermafiber Insulation Products Thermafiber LLC ESR-2996 Thermal and Moisture Protection and Firestopping Passive Fire Protection Partners Through- Penetration Firestop Systems and Fire-Resistive Joint Systems Passive Fire Protection Partners ESR-3439 Thermal and Moisture Protection and Composite wall panels ProdEX IGN Wall Panel Cladding System Prodema, S.A. ESR-3462 Thermal and Moisture Protection and Composite wall panels Parklex Façade F Wall Panel Cladding System Composites Gurea ESR-3745 Cold-Formed Metal Framing and Structural Metal Stud Framing Prescient Fire-Resistance Rated Wall and Floor- Ceiling Assemblies Prescient Company, Inc.