TEXAS WINDSTORM INSURANCE ASSOCIATION BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION 27 TAC

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1 TEXAS WINDSTORM INSURANCE ASSOCIATION BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION 27 TAC Amendments Effective June 1, 2002 DEVELOPED BY THE TEXAS DEPARTMENT OF INSURANCE

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3 I TEXAS WINDSTORM INSURANCE ASSOCIATION D BUILDINGcQDE FOB WINDSTORM RESISTANT CONSTRUCTION 27 TAG Amendments Effective December 1, 2000~ DEVELOPED BY THE TEXAS DEPARTMENT OF INSURANCE I

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5 List of Appendices List of Tables Table of Contents Section 100 General Requirements 101 Scope Building Specifications Simplified Wind Pressures Purpose What the Texas Department of Insurance Will Inspect Engineered Structures Certification By Engineers Inspection Procedure Inspections 26 Section 200 Basic Definitions, Assumptions, and Limitations of the Prescriptive Code Applicability General Historic Structures Construction Types Additions Repairs Repairs Alterations Roofing and Re-roofing General Building Nomenclature Limitations of the Prescriptive Code Building Dimensions Floor Systems Wall.Systerns Roof Systems Design Loads Wind Loads Dead Loads Live Loads Roof, Floor, Ceiling, and Wall Systems Design Specifications and.allowable Stresses Concrete Design Masonry Design Wood Design Materials Lumber Structural Panels Gypsum 49 J Fasteners Metal Connectors 51

6 Section 300 Prescriptive Requirements, Area Inland of Established Dividing Line 301 Foundations Monolithic Slab on Grade Foundation Piling Foundation Pier and Beam Foundation Post Tension Slab Foundation Floor Framing Floor Joist Systems Wood I-Joist Systems Floor Deck Wood Stud Wall Framing Wall Framing Uplift Connections Framing Around Openings Wall Bracing Chimneys Masonry Walls General Requirements Bond Beam Vertical Reinforcement Shearwalls Lintels Masonry Wall Connections Interior Walls Ceiling Framing Ceiling Joists Ceiling Diaphragm and Gable Endwall Bracing 306 Roof Framing io~ Rafters. Systems Truss Systems Overhangs at Gable Enciwalls Roof Deck Dormers Roof Coverings Composition Shingle Roof Wood Shingle or Shake Roof Tile Roofs Manufactured Metal Roofing Built-Up Roofing Single Ply and Modified Bitumen Roofing RoliRoofing Other Roofing Systems Exterior Openings Exterior Doors Garage Doors ~ Exterior Windows Skylights Protection of Exterior Openings From Windborne Debris 126

7 309 Exterior Coverings Wood Structural Panel Siding Horizontal Board Siding Vertical Board Siding Diagonal Board Siding Brick Veneer or Stone Veneer Stucco Vinyl, Aluminum, and Steel Siding Exterior Insulation and Finish Systems Attic Vents Turbine and Ridge Vents 132 Mechanical and Exterior Equipment Exterior Air Conditioner Equipment Other Exterior Equipment Miscellaneous Construction Alternative Forms of Construction Post Frame Construction Awnings and Patio Covers Supported Overhangs and Covered Porches Detached Garages Boat Houses, Docks, and Piers Mobile Homes and Manufactured Housing Industrialized Housing Portable and Temporary Buildings Other Miscellaneous Structures Re-Rooting and Repairs Re-Roofing a Composition Shingle Roof Re-Roofing a Wood Shingle or Shake Roof Re-Roofing a Built-Up Roof Re-Roofing Roll Roofing Other Re-Roofing Systems Additions, Renovation, and Repair Additions Renovation and Repair Section 400 Prescriptive Requirements, Area Seaward of Established Dividing Line 401 Foundations Monolithic Slab on Grade Foundation Piling Foundation Pier and Beam Foundation Post Tension Slab Foundation Floor Framing Floor Joist Systems Wood I-Joist Systems Floor Deck 165

8 403 Wood Stud Wall Framing Wall Framing 166, Uplift Connections Framing Around Openings Wall Bracing Chimneys 404 Masonry Walls General Requirements Bond Beam Vertical Reinforcement Shearwalls Lintels Masonry Wall Connections Interior Walls Ceiling Framing Ceiling Joists Ceiling Diaphragm and Gable Endwall Bracing Roof Framing Rafters Systems Truss Systems Overhangs at Gable Endwalls Roof Deck Dormers Roof Coverings Composition Shingle Roof Wood Shingle or Shake Roof Tile Roofs Manufactured Metal Roofing Built-Up Roofing Single Ply and Modified Bitumen Roofing Roll Roofing Other Roofing Systems Exterior Openings Exterior Doors Garage Doors Exterior Windows Skylights Protection of Exterior Openings From Windborne Debris Exterior Coverings Wood Structural Panel Siding Horizontal Board Siding Vertical Board Siding Diagonal Board Siding Brick Veneer or Stone Veneer Stucco Vinyl, Aluminum, and Steel Siding Exterior Insulation and Finish Systems Attic Vents Turbine and Ridge Vents Mechanical and Exterior Equipment Exterior Air Conditioner Equipment Other Exterior Equipment iv:

9 411 Miscellaneous Construction Alternative Forms of Construction Post Frame Construction Awnings and Patio Covers Supported Overhangs and Covered Porches Detached Garages Boat Houses, Docks, and Piers Mobile Homes and Manufactured Housing Industrialized Housing Portable and Temporary Buildings Other Miscellaneous Structures Re-Roofing and Repair Re-Roofing a Composition Shingle Roof Re-Roofing a Wood Shingle or Shake Roof Re-Roofing a Built-Up Roof Re-Roofing Roll Roofing Other Re-Roofing Systems Additions, Renovation, and Repairs Additions Renovation and Repair D ) V

10 Appendices A: Windstorm Offices.250 B: Glossary 251 C: Lumber Grading or Inspection Bureaus 258 D: Specifications and Withdrawal Values for Fasteners 264 E: Texas Department of Insurance Standard TDI F: Shear Capacities for Sheathing Materials 276 G: Reference Material Sources 278 H: Shearwall Examples 279 I: Fastening Schedule 287 J: Figures 295 vi

11 List of Tables D Table 1 03A-l Table 103J-R Table A Table B Table A-B Table A Table B Table C Table D Table Table A-C Table A-B Table 301.3A Table 301.3B Table A-B Table Table 303.2A Table 303.2B Table A Table B Table C Table D Table A Table B Table C Table D Table A Table B Table C Table D Table E Table Table Table A Table B Table A Table B Table A Wind Pressures - Inland Area 5 Wind Pressures - Seaward Area 10 Building Dimension Limitations, One Story Slab-on-Grade 37.1 Building Dimension Limitations, All Other Cases 38 Minimum Dimensions and Reinforcement for Grade Beams 55 Maximum Spacing of Anchor Bolts 55.1 Uplift Loads on Anchor Bolts One-Story Buildings 55.1 Uplift Loads on Andhor BOlts Two-Story Buildings 55.1 Uplift Loads on anchor Bolts Three-Story Buildings 55.1 Required Bolts for Beam to Piling Connection 58 Maximum Unbraced and Braced Piling Heights 60 Minimum Depth of Embedment Below Natural Grade 63 Minimum Dimensions and Reinforcement for Footings and Piers 66 Maximum Allowable Beam Spans 66.1 Maximum Spans for Floor Joists 68 Minimum Required Grade of Lumber for Exterior Non-Loadbearing Stud Walls 71 Uplift Loads - Stud to Plate Connection 75 Uplift Loads at Gable Endwalls 75 Maximum Allowable Header Span - Exterior Loadbearing Walls 77 Maximum Allowable Header Span Exterior Loadbearing Walls 77.1 Anchorage Required at Each End of Headers 78 Number of Full-Length and Header Studs Required at Each End of Headers 78 Maximum Allowable Garage Door Header Span Exterior Loadbearing Walls (Southern Pine No. 2) 79 Maximum Allowable Garage DOor Header Span Exterior Loadbearing Walls (Glued Laminated Beams) 80 Maximum Allowable Garage Door Header Span Exterior Non Loadbearing Walls (Southern Pine Na. 2) 81 Maximum Allowable Garage Door Header Span Exterior Non-Loadbearing Walls (Glued-Laminated Beams) 81 Shearwall Location Code for Table B-D 83 Minimum Length of Shearwall Required for 24 ft Roof Span 83 Minimum Length of Shearwall Required for 36 ft Roof Span 84 Minimum Length of Shearwall Required for 48 ft Roof Span 85 Sheathing Length Adjustments 86 Minimum Shearwall Segment Widths 88 Minimum Width for Narrow-Width Shearwall Segments 89 Minimum Required Holcldown CapaOity (lbs.) 90.2 Anchor Bolt Capaóities Uplift Capacity of Wood Structural Panels Simultaneous Lateral and Uplift Loads (8d Common Wire Nails) 90.5 Uplift Capacity of Wood Structural Panels Simultaneous Lateral and Uplift Loads (1 Od Common Wire Nails) 90.5 Uplift Capacity of Wood Structural Panels Uplift Loads Only (Minimum inch Shank Diameter Fasteners) 91.1 vii

12 Table B Table 303.4A Table 303.4B Table 303.4C Table 304.5A-C Table 304.5D-F Table Table A Table B Table ia-p Table Table Table Table Table A Table B Table Table Table Table Table Table 309.3A Table 309.3B Table Table Table Table A-B Table C Table Table A Table B Table A Table B Table A Table B Table A-B Table A Table B Table C Table D Table Table A-C Table A-B Table 401.3A Table 401.3B Table A-B Table Table 403.2A Table 403.2B Uplift Capacity of Wood Structural Panels Uplift Loads Only (Minimum inch Shank Diameter Fasteners) 91.1 Shearwall Location Code for Tables B-C 95 Minimum Length of Shearwall Required for 36 ft Roof Span 95 Minimum Length of Shearwall Required for 48 ft Roof Span 96 Minimum Load for Precast Concrete Lintels 97 Maximum Span of Combination Bond Beam and Lintel 98 Maximum Anchor Bolt Spacing for Ledgers 99 Maximum Allowable Span for Ceiling Joists Supporting Rafter Braces (ft.) Maximum Allowable Span for Ceiling Joists Supporting Rafter Braces (ft.) Maximum Rafter Spans 106 Maximum Ridge Beam Spans 114 Number of Nails Required on Each End of Ridge Strap 115 Thrust Load Anchorage for Cathedral Ceilings 116 Uplift Loads Rafter to Top Plate 117 Determination of Anchorage Required at Wall Studs Maximum Allowable Uplift Load for Trusses Design Wind Pressure Requirements for Exterior Doors 124 Design Wind Pressure Requirements for Garage Doors Design Wind Pressure Requirements for Exterior Windows 125 Design Wind Pressure Requirements for Skylights 126 Minimum Common Nail Size for Wood Structural Panel Siding 127 Minimum Nailing at Each End of Blocking to Studs for Vertical Board Siding Minimum Common Nail Size-Siding to Blocking for Vertical Board Siding Minimum Common Nail Size-Diagonal Siding to Studs and Plates 129 Minimum Common Nail Size for Brick Ties 131 Fastener Spacing Along the Studs for Lath to Studs or Solid Wood Sheathing 131 Post and Beam Requirements 136 Maximum Spans of Girts Uplift Load Requirements Maximum Spans for Support Beams Composition Shingle Roofs 139 Maximum Spans for Support Beams Tile Roofs 140 Uplift Capacity of Beams Anchored to Posts With Two Bolts (lbs.) 141 Uplift Capacities of Posts Embedded in Concrete (lbs) 141 Minimum Length of Shearwall Required (ft.) on Rear Wall of Garage Minimum Length of Shearwall Required (ft.) on Side Walls of Garage Minimum Dimensions and Reinforcement for Grade Beams 151 Maximum Spacing of Anchor Bolts Uplift Loads on Anchor Bolts One-Story Buildings Uplift Loads on Anchor Bolts Two-Story Buildings Uplift Loads on Anchor Bolts Three-Story Buildings Required Bolts for Beam to Piling Connection 154 Maximum Unbraced and Braced Piling Heights 156 Minimum Depth of Embedment Below Natural Grade 159 Minimum Dimensions and Reinforcement for Footings and Piers 162 Maximum Allowable Beam Spans Maximum Spans for Floor Joists 164 Minimum Required Grade of Lumber for Exterior Non-Loadbearing Stud Walls 167 Uplift Loads - Stud to Plate Connection 171 Uplift Loads at Gable Endwalls 171 VI H

13 Table A Maximum Allowable Header Span - Exterior Loadbearing Walls 173 ) Table B Maximum Allowable Header Span Exterior Loadbearing Walls Table C Anchorage Required at Each End of Headers 174 Table D Number of Full-Length and Header Studs Required at Each End of Headers 174 Table A Maximum Allowable Garage Door Header Span Exterior Loadbearing Walls (Southern Pine No. 2) 175 Table B Maximum Allowable Garage Door Header Span Exterior Loadbearing Walls (Glued-Laminated Beams) 176 Table C Maximum Allowable Garage Door Header Span Exterior Non-Loadbearing Table D Walls (Southern Pine No. 2) 177 Maximum Allowable Garage Door Header Span Exterior Non-Loadbearing Walls (Glued-Laminated Beams) 177 Table A Shearwall Location Code for Table B-D 179 Table B Minimum Length of Shearwall Required for 24 ft. Roof Span 179 Table C Minimum Length of Shearwall Required for 36 ft. Roof Span 180 Table D Minimum Length of Shearwall Required for 48 ft. Roof Span 181 Table E Sheathing Length Adjustments 182 Table Minimum Shearwall Segment Widths 184 Table Minimum Widths for Narrow-Width Shearwall Segments 185 Table A Minimum Required Holddown Capacity (lbs.) Table B Anchor Bolt Capacities Table A Table B Table A Table B Uplift Capacity of Wood Structural Panels Simultaneous Lateral and Uplift Loads (8d Common Wire Nails) Uplift Capacity of Wood Structural Panels Simultaneous Lateral and Uplift Loads (1 Od Common Wire Nails) Uplift Capacity of Wood Structural Panels Uplift Loads Only (Minimum inch Shank Diameter Fasteners) Uplift Capacity of Wood Structural Panels Uplift Loads Only (Minimum inch Shank Diameter Fasteners) Table 404.4A ~:Table 404.4B Masonry Sheathing Location Code for Tables B-C Minimum Length of Masonry Shearwalls Required 36 ft. Roof Span Table 404.4C Minimum Length of Masonry Shearwalls Required 48 ft. Roof Span 192 Table 404.5A-C Minimum Load for Precast Concrete Lintels 193 Table 404.5D-F Maximum Span of Combination Bond Beam and Lintel 194 Table Maximum Anchor Bolt Spaóing for Ledgers 195 Table A Maximum Allowable Span for Ceiling Joists Supporting Rafter Braces (ft.) Table B Maximum Allowable Span for Ceiling Joists Supporting Rafter Braces (ft.) Table A-P Maximum Rafter Spans 202 Table Maximum Ridge Beam Spans 210 Table Number of Nails Required on Each End of Ridge Strap 211 Table Thrust Load Anchorage for Cathedral Ceilings 212 Table Uplift Loads - Rafter to Top Plate 213 Table A Determination of Anchorage Required at Wall Studs Table B Maximum Allowable Uplift Loads for Trusses Table Design Wind Pressure Requirements for Exterior Doors 220 Table Design Wind Pressure Requirements for Garage Doors Table Design Wind Pressure Requirements for Exterior Windows 221 Table Design Wind Pressure Requirements for Skylights 222 Table A Cyclic Wind Pressure Requirements for Exterior Doors and Windows 223 Table B Cyclic Wind Pressure Requirements for Garage Doors 223 Table Fastening Requirements for Wood Structural Panel Impact Protective Systems 224 Table Cyclic Wind Pressure Requirements for Skylights 225

14 Table Table 409.3A Table 409.3B Table Table Table Table A-B Table C Table Table A Table B Table A Table B Table A Table B Minimum Common Nail Size for Wood Structural Panel Siding 226 Minimum Nailing at Each End of Blocking to Studs for Vertical Board Siding 227 Minimum Common Nail Size-Siding to Blocking for Vertical Board Siding 228 Minimum Common Nail Size-Diagonal Siding to Studs and Plates 228 Minimum Common Nail Size for Brick Ties 230 Fastener Spacing Along the Studs for Lath to Studs or Solid Wood Sheathing 230 Post and Beam Requirements 235 Maximum Spans of Girls 236 Uplift Load Requirements 238 Maximum Spans for Support Beams Composition Shingle Roofs 238 Maximum Spans for Support Beams Tile Roofs 239 Uplift Capacity of Beams Anchored to Posts With Two Bolts (lbs.) Uplift Capacity of Posts Embedded in Concrete (lbs.) 240 Minimum Length of Shearwall Required (ft.) on Rear Wall of Garage Minimum Length of Shearwall Required (ft.) on Side Walls of Garage x

15 D Section 100 General Requirements 1

16 Amendments Effective December BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION 101 Scope The 70th Texas Legislature passed House Bill 2012, (codified as Article Section 6A, Texas ) Insurance Code), which implements certain inspection requirements for structures to be considered insurable property for windstorm and hail insurance through the Texas Windstorm Insurance Association (T. Wl.A.), formerly known as the Texas Catastrophe Property Insurance Association (T.C.P.I.A.). All new construction, repairs, or additions which commenced on or after January 1, 1988, shall be inspected or approved by the Texas Department of Insurance for compliance with the building specifications in the T.WI.A. Plan of Operation, if the property is to be certified as insurable by the T.W.I.A. Participation in this program is not mandatory. However, property which has not been inspected and certified in accordance with the requirements of this inspection program will not be eligible for..windstorm insurance through the T.W.I.A. The inspection program applies only to structures located in areas designated as a catastrophe area by the Commissioner of the Texas Department of Insurance. The current areas designated as a catastrophe area are as follows: 1. Aransas County 2. Brazoria County 3. Calhoun County 4. Cameron County 5. Chambers County 6. Galveston County 7 Jefferson County 8. Kenedy County 9. Kleberg County 10. Matagorda County 11. Nueces County 12. Refuglo County 13. San Patriclo County 14. Willacy County 15. Other areas as designated by the Commissioner of Insurance Scope

17 BUiLDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Amendments EffecUve August 1, Building Specifications To be certified by the Texas Department of Insurance as insurable by the T.W.I.A, structures which commence construction on or after September shall be built to resist wind pressures determined from the wind load provisions of ASCE 7-93, Minimum Design Loads for Buildings and Other Structures Structures built Inland of the dividing line established by the Texas Department of Insurance shall be designed and constructed to resist a fastest mile basic wind speed of 95 miles per hour Structures built seaward of the dividing line shall be designed and constructed to resist a fastest mile basic wind speed of 100 miles per hour. All structures located in the area seaward of the dividing line established by the Texas Department of Insurance shall have exterior wall openings protected in compliance with Section Structures which will be inspected by the Texas Department of Insurance shall either be constructed to comply with the prescriptive requirements of this building code or shall have been designed by a Texas licensed professional engineer as specified in Section 105 and Section 107. Structures which will be designed or designed and inspected by a Texas licensed professional engineer shall be designed to comply with either the wind load provisions of ASCE 7-93 or the simplified wind pressures specified in Section 103 The engineer shall submit to the Texas Department of Insurance the documentation specified in either Section 105 or Section 107 If the engineer elects to use the wind load provisions of ASCE 7-93 to determine the wind loads for the structure, then the engineer shall use an Exposure Category that adequately reflects the characteristics of the ground surface for the site at which the building is to be constructed. The Texas licensed professional engineer may inspect a building for compliance using the prescriptive requirements contained in this building code The engineer shall submit to the Texas Department of Insurance the documentation specified in Section 107. ) 102 Building Specifications 3

18 Amendments Effective August 1, 2000 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION 103 Simplified Wind Pressures As an alternative to calculating the wind loads on a building using the wind load provisions of ASCE 7-93, the wind pressures presented in this section may be used. The wind pressures presented in this section were determined using the wind load provisions of ASCE 7-93 Wind pressures are presented for both the inland area and the seaward area. Wind pressures for the inland area were determined using a fastest mile basic wind speed of 95 miles per hour. Wind pressures for the seaward area were determined using a fastest mile basic wind speed of 100 miles per hour; Building Exposure Category C was used for both the inland and the seaward areas. The wind pressures presented in this section were calculated using rectangular shaped buildings, three stones or less in height having roof slopes less than or equal to (45 degrees) The wall height of each story does not exceed 10 feet. If the building geometry does not fall within these limitations, the simplified wind loads presented in this section cannot be used. Wind pressures were calculated assuming that the building is an enclosed structure. It is assumed that all, glazed openings, doors, and garage doors are either designed to resist impact from windbome debris or are protected from impact by windbome debris. It is further assumed that all glazed openings, doors, and garage doors have been adequately designed to resist the wind pressures specified in this section. Buildings that can not meet this criteria are considered to be partially enclosed Partially enclosed buildings can not be designed using the simplified wind loads presented in this section. Wind pressures for such buildings shall be determined from ASCE 7-93 directly. The wind pressures presented in this section were determined for two categories of systems on a building; (1) the main wind-force resisting systems and (2) the structural components and cladding. The main wind-force resisting systems of a building include rigid and braced frames, roof and floor diaphragms, shearwalls, and the anchorage of roof and wall framing. These pressures shall also be used to determine overturning resistance. Components and cladding include exterior glass windows, doors and garage doors, exterior siding and brick veneer, roof and wall sheathing, roof coverings, roof trusses and rafters, exterior wall studs, purlins, and girts. The wind pressures in this section are presented in the form of tables. Tables I 03A-I contain wind pressures for inland areas and Tables 103J-R contain wind pressures for seaward areas. Tables for each area are further categorized as wind pressures for main wind-force resisting systems and wind pressures for components and cladding. The wind pressures in these tables are either positive or negative. A positive wind pressure is defined as wind pressure acting towards the surface of the building. Positive wind pressures presented in the tables are denoted by a + sign in front of the number unless otherwise noted. A negative wind pressure is defined as wind pressure acting away from the surface of the building. Negative wind pressures presented in the tables are denoted by a - sign in front of the number unless otherwise noted. Wind pressures always act perpendicular to the surface upon which they are acting Simplified Wind Pressures

19 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Amendments Effective December31, 1998 Table 103A Wind Pressures Inland Area Main Wind Force Resisting System Windward Wall Windward Wall Wind Pressure (psf) Height_(ft) Table 103B Wind Pressures Inland Area Main Wind Force Resisting System Leeward Wall Building Type Wind Pressure (psf) I Story -8 (Slab-on-grade;_Piers) 2 Story (Slab-on-grade; Piers) Or -8.5 I Story (Pile_Foundation) ~ 3Story (Slab-on-grade) Or -9 2 Story (Pile_Foundation).~Z) 103 Simplified Wind Pressures 5

20 Amendments Effective December 31, 1998 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Table 103C Wind Pressures Inland Area Main Wind Force Resisting System Roof (Wind Parallel to Ridge), Side Walls I Negative Wind Pressures (psf) Building Roof Slope Type <3:12 3:12-7:12 >7:12-12:12 I Story (Slab-on-grade;_Piers) 2Story (Slab-on-grade; Piers) Or I Story (Pile_Foundation) 3 Story (Slab-on-grade) Or Story (Pile_Foundation) Table 103D Wind Pressures Inland Area Main Wind Force Resisting System Roof Overhang Building Type Wind Pressure (psf) 1 Story +21 (Slab-on-grade;_Piers) 2 Story (Slab-on-grade; Piers) ~ Or +23 ~ I Story (Pile_Foundation) 3 Story (Slab-on-grade) Or Story (Pile_Foundation) Note: Pressure is applied to underside of windward overhang Simplified Wind Pressures

21 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Amendments Effective December Loading Condition I Table 103E Wind Pressures Inland Area Main Wind Force Resisting System Roof (Wind Normal to Ridge) Windward Side (Positive Wind Pressures (psf)) Building Roof Slope Type < 2:12 2:12 3:12 4:12 5:12 6:12 7:12 10:12 12:12 I Story (Slab-on-grade; Piers) 2 Story (Slab-on-grade; Piers) Or I Story (Pile_Foundation) 3 Story (Slab-on-grade) Or Story (Pile_Foundation) Side (Negative Wind Pressures_(psf)) Building Roof Slope Type <2:12 2:12 3:12 4:12 5:12 6:12 7:12 10:12 12:12 I Story (Slab-on-grade; Piers) 2 Story (Slab-on-grade; Piers) Or I Story (Pile Foundation) 3Story (Slab-on-grade) Or 2 Story (Pile_Foundation) Note: A - indicates that the loading condition does not exist, design using Loading Condition 2 below. ) 103 Simplified Wind Pressures 7

22 Amendments Effective December 31, 1998 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Table 103F Wind Pressures Inland Area Main Wind Force Resisting System Roof (Wind Normal to Ridge) Loading Condition 2 Windward Side (Negative Wind Pressures (psf)) Building Roof Slope Type Flat 1:12 2:12 3:12 4:12 5:12 6:12 7:12 >7:12 I Story (Slab-on-grade; Piers) 2 Story (Slab-on-grade; Piers) Or I Story (Pile Foundation) 3 Story (Slab-on-grade) Or Story (Pile_Foundation) Leeward Side (Negative Wind Pressures_(psf)) Building Roof Slope Type Flat 1:12 2:12 3:12 4:12 5:12 6:12 7:12 >7:12 I Story (Slab-on-grade; Piers) 2 Story (Slab-on-grade; Piers) Or I Story (Pile Foundation) 3 Story (Slab-on-grade) Or Story (Pile Foundation) Note: A - indicates that the loading condition does not exist, design using Loading Condition I above Simplified Wind Pressures

23 BUILDING CODE FOR WINDSTORM RESISTANT CONSTRUCTION Amendments Effective December 31, 1998 Table 103G Wind Pressures Inland Area Components and Cladding Roof Pressures (psf) Roof Slope and Roof Zone (See Figure 1 03D for Zone Location) Building Trib. <3:12 3:12-7:12 >7:12 12:12 Type Area Zone Zone Zone Zone Zones Zone Zones I Story 10 ft , (Slab-on-grade, Piers) 32 ft , , Story 10 ft ; ; -43 (Slab-on-grade; Piers) Or I Story 32 ft ; ; -41 (Pile_Foundation) 3 Story 10 ft ; ; -45 (Slab-on-grade) Or 2 Story 32 ft ; ; -43 (Pile_Foundation) o Table 103H Wind Pressures Inland Area Components and Cladding Wood Stud Wall Pressures (psf) Roof Slope and Wall Zone (See FigUre 103D for Zone Location) Building Trib. <3:12 3:12-7:12 >7:12 12:12 Type Area Zone Zone Zone Zone Zone Zone I Story 10 ft ~ (Slab-on-grade; Piers) 32 ft Story 10 ft (Slab-on-grade; Piers) Or I Story 32 ft (Pile_Foundation) 3 Story 10 ft (Slab-on-grade) Or 2 Story 32 ft (Pile_Foundation) 103 SimplIfied Wind Pressures 9 S -~

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