Texas Department of Insurance Adopted 2018 I-Codes Adopted Codes - PowerPoint PPT Presentation

Texas Department of Insurance Adopted 2018 I-Codes

Adopted Codes International Residential Code 2018 International Building Code Without Texas Revisions

2018 International Residential Code Figure R301.2(4)A Ultimate Design Wind Speeds 2018 International Residential Code – Figure R301.2(5)A

2018 International Residential Code Figure R301.2(4)A Ultimate Design Wind Speeds Wind speeds will be determined by the maps in the I-Codes Wind Zones Inland II • Inland I • Seaward • Will not be used to determine Wind Speeds

2018 International Residential Code R301.2.1 Wind design criteria Cladding and components require “design load performance” Items such as: Wall coverings Skylights Curtain walls Garage doors Roof coverings Exterior doors Exterior windows Visit: https://tdi.texas.wind/prod/index.html

2018 International Residential Code R301.2.1.1 Wind limitations and wind design required in accordance with Figure R301.2(5)B The design of building for wind loads shall be in accordance with one or more of the following: • AWC Wood Frame Construction Manual (WFCM) • ICC Standard for Residential Construction in High-Wind Regions (ICC 600) • ASCE 7 Minimum Design Loads for Buildings and Other Structures • AISI Standard for Cold-Formed Steel Framing (AISI S230) • International Building Code

2018 International Residential Code Figure R301.2(4)B Wind Design is Required 2018 International Residential Code – Figure R301.2(5)B

2018 International Residential Code – Design Pressure Factors Wind Speeds 2018 International Residential Code – Figure R301.2(5)A

2018 International Building Code Table 1604.5 – Risk Category of Building and other Structures Risk Category Nature of Occupancy I Low hazard to human life in the event of failure II Other structures not listed in Risk Categories I, III, or IV III Substantial hazard to human life in the event of failure IV Essential facilities

2018 International Residental Code R301.2.1 – Wind Design Criteria 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

2018 International Residential Code Mean Roof Height and Building Exposure Adjustment Coefficients Mean Roof Building Exposure Height B C D 15 0.82 1.21 1.47 20 0.89 1.29 1.55 30 1.00 1.40 1.66 35 1.05 1.45 1.70 40 1.09 1.49 1.74 45 1.12 1.53 1.78 50 1.16 1.56 1.81 55 1.19 1.59 1.84 60 1.22 1.62 1.87

2018 International Residential Code R301.2.1.4 Exposure B Category “Urban and suburban areas, wooded areas or other terrain with numerous closely spaced obstructions having the size of single-family dwellings or larger. Exposure B shall be assumed unless the site meets the definition of another type exposure.”

2018 International Residential Code R301.2.1.4 Exposure C Category “Open terrain with scattered obstructions, including surface undulations or other irregularities, having heights generally less than 30 feet (9144 mm) extending more than 1,500 feet (457 m) from the building site in any quadrant. This exposure shall apply to any building located within Exposure B type terrain where the building is directly adjacent to open areas of Exposure C type terrain in any quadrant for a distance of more than 600 feet (183 m). This category includes flat, open country and grasslands.”

2018 International Residential Code R301.2.1.4 Exposure D Category “Flat, unobstructed areas exposed to wind flowing over open water, smooth mud flats, salt flats and unbroken ice for a distance of not less than 5,000 feet (1524 m) This exposure shall apply only to those buildings and other structures exposed to the wind coming from over the unobstructed area. Exposure D extends downwind from the edge of the unobstructed area a distance of 600 feet (183 m) or 20 times the height of the building or structure, whichever is greater.”

2018 International Residential Code – Product Evaluations TDI does not approve or endorse the use of any product manufacturer or building product To search for tested products, visit: https://tdi.texas.wind/prod/index.html The Department recognizes other recognized entities, such as: International Code Council (ICC) Miami-Dade County Factory Mutual

2018 International Residential Code – Windows & Doors R609.2 Performance Exterior windows and doors • Must be designed to resist wind loads adjusted for height and exposure; or • By ASCE 7 using allowable stress design load combinations of ASCE 7

2018 International Residential Code R609.2 Performance Exterior windows and doors tested per AAMA/WDMA/CSA • 101/I.S.2/A440 – 17, or AMD 100 1. Required Design Pressures determined from ASCE 7 using the ultimate strength design may be multiplied by 0.6

2018 International Residential Code R609.3 Testing and labeling Exterior windows and sliding glass doors 1. AAMA/WDMA/CSA 101/I.S.2/A440 – 17 Exterior side-hinged doors 1. AAMA/WDMA/CSA 101/I.S.2/A440 – 17, or AMD 100

Design Pressures using ASCE 7-16 Design Wind Pressure Requirements for Windows, Exterior Doors and Impact Protective Systems (Shutters) Based on MRH of 30 Feet and Exposure B conditions Corner Zones 120 mph 130 mph 140 mph 150 mph 160 mph 170 mph +14.8 / -19.4 +17.4 / -22.8 +20.2 / -26.4 +23.2 / -30.3 +26.6 / -34.5 +29.8 / -38.9

2018 International Residential Code – Protection of Openings R301.2.1.2 Protection of Openings Exterior glazing in buildings located in windborne debris regions shall be 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

2018 International Residential Code R301.2.1.2 Protection of Openings Permits glazed openings in hurricane-prone regions to be protected with 7/16” Wood Structural Panels Required in areas where the ultimate design wind • speed, V ult , is 140mph or greater Requires corrosion-resistant fasteners • Fasteners are required to be permanently attached • to building

2018 International Residential Code Figure R301.2(4)A Ultimate Design Wind Speeds 2018 International Residential Code – Figure R301.2(5)A

2018 International Residential Code Table R301.2.1.2 Protection of Openings Permits glazed openings to be protected with 7/16” Wood Structural Panels Fastener Type Fastener Spacing (inches) Panel 4 feet < 6 feet < span < 4 panel span panel span feet < 6 feet < 8 feet No. 8 wood screw based anchor with 2-inch 16 10 8 embedment length No. 10 wood screw based anchor with 2-inch 16 12 9 embedment length ¼-Inch lag based anchor with 2-inch embedment 16 16 16 length

2018 International Residential Code – Roof Coverings Table R905.1.1(1) Underlayment Types Maximum Ultimate Design Maximum Ultimate Design Roof Covering Section Wind Speed, V ult < 140mph Wind Speed, V ult > 140mph ASTM D 226 Type I ASTM D 226 Type II Asphalt Shingles R905.2 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 6757 ASTM D 6757 ASTM D 226 Type II ASTM D 226 Type II Clay and concrete tile R905.3 ASTM D 2626 Type I ASTM D 2626 Type I ASTM D 6380 Class M mineral surfaced roll roofing ASTM D 6380 Class M mineral surfaced roll roofing ASTM D 226 Type I or II ASTM D 226 Type II Metal roof shingles R905.4 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 226 Type I or II ASTM D 226 Type II Mineral-surfaced roll roofing R905.5 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 226 Type I or II ASTM D 226 Type II Slate and slate-type shingles R905.6 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 226 Type I or II ASTM D 226 Type II Wood shingles R905.7 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 226 Type I or II ASTM D 226 Type II Wood shakes R905.8 ASTM D 4869 Type I, II, III, or IV ASTM D 4869 Type IV ASTM D 226 Type II Metal panels R905.10 Manufacturer’s instructions ASTM D 4869 Type IV

2018 International Residential Code Table R905.1.1(1) Underlayment Types Underlayment is required to bear a label indicating compliance to the Standard designation (ASTM D#) and the Type Classification ASTM D226, Type II ASTM D4869, Type III or IV ASTM D6757 Synthetic Underlayments are ASTM D1970 not specifically addressed in the 2018 IRC Hold unto the underlayment wrappers for the inspector