The URL can be used to link to this page

Home My WebLink About2024_11_13_IRC_Presentation2021 IRC SignificantChanges R202 Townhouse and Townhouse Unit TOWNHOUSE. Building that contains three or more attachedtownhouse units. TOWNHOUSE UNIT. A single-family dwelling unit in a townhousethat extends from foundation to roof and that has a yard orpublic way on not less than two sides R202 Intermodal Shipping Containers Provisions for construction with intermodal shippingcontainers added by referencing IBC Section 3315 andICC G5 – Guideline for the Safe Use of ISO Shipping ContainersRepurposed as Buildings and Building Components R301.1.4 Meryll Ricardo CFO Wind Design Updated wind speed maps match IBC and ASCE 7 maps with a large portion of the country having wind speeds less than 115mph R301.2.1 Story Height R301.3 Townhouse Common Wall Common walls separating townhouses can terminate at the inside of exterior walls -Two 2" studs as fireblocking R302.2 TWO-FAMILY DWELLING SEPARATION 1-hour separation whether or not a lot line exists between units R302.3 Mechanical Ventilation Whole-house mechanical ventilation system or a mechanical ventilation system capable of producing 0.35 ACH in habitable rooms Local exhaust system is an acceptable substitute for natural ventilation in kitchens R303.1 Glazing and Wet Surfaces Replaced the word “facing” with the words “adjacent to” for those elements related to wet surfaces. R308.4.5 Window Fall Protection • Measurements for determining need for fall protection taken to bottom of clear opening of window R312.2 Smoke Alarm Locations • New location requirement addresses high ceilings adjacent to hallways serving bedrooms R314.3 Smoke Alarm Locations (Cont’d) R314.3 Smoke alarms identified as having resistance to common nuisance alarms from cooking sources permitted as close as 6’ from cooking appliance Carbon Monoxide Alarms • Repairs to existing fuel-fired mechanical systems now trigger retroactive requirements for carbon monoxide alarms R315.2.2 Storm Shelters • Engineered design required R323.1.1 Photovoltaic Systems Building-integrated photovoltaic (BIPV) systems meeting specified criteria do not require firefighter access pathways and setbacks R324.6 Habitable Attics Habitable space above 2nd story or 1st story meets definition of story – no additional requirements R326 Habitable Attics Habitable attic above 3rd story not a story if: • Sprinkler system • Area limited to one-half area of story below R326 Vapor Retarder Thicker vapor retarders now required below slabs on grade Minimum 10 mil (0.01”) thick R506.2.3 Cripple Walls – Fully Sheathed Applies only to exterior cripple walls R602.9 Garage Door Labelling Garage doors shall be labeled with permanent label provided by manufacturer Label shall identify -manufacturer -model/series number -positive and negative design wind pressure rating -installation instruction drawing reference number -applicable test standard R314.3 Soffits Requirements for soffit material and installation expanded in a new section R704 Soffits R704.1 General wind limitations R704.2 Soffit installation where design wind pressure < 30 psf R704.2.1 Vinyl soffit panels R704.2.2 Fiber-cement soffit panels R704.2.3 Hardboard soffit panels R704.2.4 Wood structural panel soffit R704.3 Soffit installation where design wind pressure > 30 psf R704.3.1 Vinyl soffit panels R704.3.2 Fiber-cement soffit panels R704.3.3 Hardboard soffit panels R704.3.4 Wood structural panel soffit R704 Metal Roof Shingle Wind Resistance Requirements for metal shingle wind resistance added R905.4.4.1 High-Efficacy Light Sources • Definition revision • Lamps ≥ 65 lumens/W • Luminaires ≥ 45 lumens/W • Reflects current technology and federal standards N1101.6 Climate Zones • Comprehensively updated • New Climate Zone 0 • Approximately 10% of US counties assigned new climate zone N1101.7 Compliance Options • Options revised • Prescriptive and mandatory labels in section titles removed N1101.13 Compliance Options (Cont’d) • Prescriptive Compliance • Total Building Performance • Energy Rating Index • Tropical Climate Region N1101.13 Permanent Energy Certificate • Additional information • Building thermal envelope • Solar energy • Energy Rating Index (ERI) • Code edition N1101.14 N1102.2.4 Access Hatches and Doors • Prescriptive provisions for insulation levels and mandatory provisions for installation (weatherstripping and baffles) have been placed in separate sections. • Provisions addressing pull-down stairs have been added. N1102.2.7 Floor Insulation • Cavity insulation compliance • Underside of subfloor • Top side of ceiling • Continuous insulation top side of ceiling Building Air Leakage and Testing • 5 ACH for all compliance paths • 3 ACH for prescriptive path in climate zones 3-8 • Heated attached and detached garages field verified for air barrier and insulation • Exception to quantify air leakage in attached and small volume dwelling units • Changes throughout Air Barrier, Air Sealing, and Insulation Installation table Building Air Leakage and Testing N1102.4 & Table N1102.4.1.1 N1102.4.6 Air-Sealed Electrical Boxes • Electrical and communication outlet boxes in thermal envelope • Sealed • Tested NEMA OS 4 • Marked "NEMA OS 4" or "OS 4" • Installed per manufacturer's instructions and NEMA OS 4 • Where ductwork qualifies as being in conditioned space • Duct system completely within continuous air barrier and thermal envelope • Duct work in ventilated attic and buried in ceiling insulation • Duct work in floor cavities over unconditioned space • Duct work in exterior walls N1102.4.6 Duct Installation • Exception for testing ducts in conditioned spaces deleted N1102.3.5 Duct Testing Lighting Equipment • High-efficacy lighting now required in all permanent lighting fixtures • New provisions regulate lighting controls for interior and exterior lighting N1102.3.5 Through-the-wall Vent Terminals G2427.8 Makeup Air for Dryer Installed in a Closet • The requirement for a transfer opening for supplying makeup air to a closet designed for a gas dryer has been moved into a separate section. Transfer grite min. 100 sq. in. free area Commercial Cooking Appliances • Prohibited Hot Water Piping Length to Fixtures Fixture Traps as Cleanouts • Removable traps and removeable fixtures with integral traps acceptable for use as cleanouts Relining of Building Sewers and Building Drains • Recognizes various available technologies for relining of existing building sewer and building drainage piping • Clarifies inspection procedures Emergency Service Disconnects Required in a readily accessible outdoor location Service Surge-Protective Device SPD now required at service panel Bathroom Branch Circuits • Dedicated 20-amp circuit for required outlets or those serving a countertop only Bathroom Branch Circuits • Receptacle outlets prohibited within 3’ horizontally from bathtub rim or shower stall threshold Garage Branch Circuits Dedicated 20-amp circuits for required outlets only