AISI S240 2015

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AISI S240-15: North American Standard for Cold-Formed Steel Structural Framing, 2015 Edition

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AISI	2015

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Description

PDF Catalog

PDF Pages	PDF Title
3	DISCLAIMER
6	PREFACE
14	AISI COMMITTEE ON FRAMING STANDARDS
15	GENERAL PROVISIONS SUBCOMMITTEE
16	DESIGN METHODS SUBCOMMITTEE
17	LATERAL DESIGN SUBCOMMITTEE
18	STANDARD PRACTICES SUBCOMMITTEE
19	TRUSS DESIGN SUBCOMMITTEE
36	NORTH AMERICAN STANDARD FOR COLD-FORMED STEEL STRUCTURAL FRAMING A. GENERAL A1 Scope A2 Definitions A2.1 Terms
43	A3 Material A4 Corrosion Protection
44	A5 Products A5.1 Base Steel Thickness A5.2 Minimum Flange Width A5.3 Product Designator A5.4 Manufacturing Tolerances
46	A5.5 Product Identification A5.5.1 Identification of Groups of Like Members A5.5.2 Identification of Individual Framing Members A6 Reference Documents
49	B. DESIGN B1 General B1.1 Loads and Load Combinations B1.1.1 Application of Live Load Reduction on Wall Studs B1.1.2 Application of Wind Loads on Wall Studs in the United States and Mexico B1.2 Design Basis B1.2.1 Floor Joists, Ceiling Joists and Roof Rafters
50	B1.2.2 Wall Studs
51	B1.2.3 In-Line Framing B1.2.4 Sheathing Span Capacity B1.2.5 Load Path
52	B1.2.6 Principles of Mechanics B1.3 Built-Up Section Design B1.4 Properties of Sections B1.5 Connection Design
53	B1.5.1 Screw Connections B1.5.1.1 Steel-to-Steel Screws B1.5.1.2 Sheathing Screws B1.5.1.3 Spacing and Edge Distance B1.5.1.4 Gypsum Board B1.5.2 Welded Connections B1.5.3 Bolts B1.5.4 Power-Actuated Fasteners B1.5.5 Other Connectors
54	B1.5.6 Connection to Other Materials B2 Floor and Ceiling Framing B2.1 Scope B2.2 Floor Joist Design B2.2.1 Bending B2.2.1.1 Lateral-Torsional Buckling B2.2.1.2 Distortional Buckling B2.2.2 Shear
55	B2.2.3 Web Crippling B2.2.4 Bending and Shear B2.2.5 Bending and Web Crippling B2.3 Ceiling Joist Design B2.3.1 Tension B2.3.2 Compression B2.3.2.1 Yielding, Flexural, Flexural-Torsional and Torsional Buckling B2.3.2.2 Distortional Buckling B2.3.3 Bending B2.3.3.1 Lateral-Torsional Buckling
56	B2.3.3.2 Distortional Buckling B2.3.4 Shear B2.3.5 Web Crippling B2.3.6 Axial Load and Bending B2.3.7 Bending and Shear B2.3.8 Bending and Web Crippling B2.4 Floor Truss Design
57	B2.5 Bearing Stiffeners B2.5.1 Clip Angle Bearing Stiffeners
58	B2.6 Bracing Design
59	B2.7 Floor Diaphragm Design B3 Wall Framing B3.1 Scope B3.2 Wall Stud Design B3.2.1 Available Axial Strength [Factored Resistance] B3.2.1.1 Yielding, Flexural, Flexural-Torsional and Torsional Buckling
60	B3.2.1.2 Distortional Buckling B3.2.2 Bending B3.2.2.1 Lateral-Torsional Buckling
61	B3.2.2.2 Distortional Buckling B3.2.3 Shear B3.2.4 Axial Load and Bending B3.2.5 Web Crippling B3.2.5.1 Stud-to-Track Connection for C-Section Studs
65	B3.2.5.2 Deflection Track Connection for C-Section Studs
66	B3.3 Header Design B3.3.1 Back-to-Back Headers B3.3.1.1 Bending B3.3.1.2 Shear B3.3.1.3 Web Crippling B3.3.1.4 Bending and Shear B3.3.1.5 Bending and Web Crippling
67	B3.3.2 Box Headers B3.3.2.1 Bending B3.3.2.2 Shear B3.3.2.3 Web Crippling B3.3.2.4 Bending and Shear B3.3.2.5 Bending and Web Crippling
68	B3.3.3 Double L-Headers
69	B3.3.3.1 Bending B3.3.3.1.1 Gravity Loading B3.3.3.1.2 Uplift Loading
70	B3.3.3.2 Shear B3.3.3.3 Web Crippling B3.3.3.4 Bending and Shear B3.3.3.5 Bending and Web Crippling B3.3.4 Single L-Headers B3.3.4.1 Bending B3.3.4.1.1 Gravity Loading
71	B3.3.4.1.2 Uplift Loading B3.3.4.2 Shear B3.3.4.3 Web Crippling B3.3.4.4 Bending and Shear B3.3.4.5 Bending and Web Crippling B3.3.5 Inverted L-Header Assemblies
72	B3.4 Bracing B3.4.1 Intermediate Brace Design B3.5 Serviceability B4 Roof Framing B4.1 Scope B4.2 Roof Rafter Design B4.2.1 Tension B4.2.2 Compression B4.2.2.1 Yielding, Flexural, Flexural-Torsional and Torsional Buckling B4.2.2.2 Distortional Buckling
73	B4.2.3 Bending B4.2.3.1 Lateral-Torsional Buckling B4.2.3.2 Distortional Buckling B4.2.4 Shear B4.2.5 Web Crippling B4.2.6 Axial Load and Bending
74	B4.2.7 Bending and Shear B4.2.8 Bending and Web Crippling B4.3 Roof Truss Design B4.4 Bearing Stiffeners B4.5 Bracing Design
75	B4.6 Roof Diaphragm Design B5 Lateral Force-Resisting Systems B5.1 Scope B5.2 Shear Wall Design B5.2.1 General B5.2.1.1 Type I Shear Walls
76	B5.2.1.2 Type II Shear Walls B5.2.2 Nominal Strength [Resistance] B5.2.2.1 Type I Shear Walls B5.2.2.2 Type II Shear Walls
77	B5.2.2.3 Nominal Strength [Resistance] per Unit Length B5.2.2.3.1 General Requirements
78	B5.2.2.3.2 Steel Sheet Sheathing B5.2.2.3.2.1 Effective Strip Method
79	B5.2.2.3.3 Wood Structural Panel Sheathing
80	B5.2.2.3.4 Gypsum Board Panel Sheathing B5.2.2.3.5 Fiberboard Panel Sheathing B5.2.2.3.6 Combined Systems
85	B5.2.3 Available Strength [Factored Resistance] B5.2.4 Collectors and Anchorage B5.2.4.1 Collectors and Anchorage for In-Plane Shear B5.2.4.1.1 Type I Shear Walls B5.2.4.1.2 Type II Shear Walls B5.2.4.2 Uplift Anchorage at Wall Ends
86	B5.2.4.2.1 General B5.2.4.2.2 Type I Shear Walls B5.2.4.2.3 Type II Shear Walls B5.2.4.3 Uplift Anchorage Between Type II Shear Wall Ends B5.2.5 Design Deflection
88	B5.3 Strap Braced Wall Design B5.3.1 General B5.3.2 Nominal Strength [Resistance] B5.3.3 Available Strength [Factored Resistance] B5.3.4 Collectors and Anchorage B5.3.4.1 Collectors and Anchorage for In-Plane Shear B5.3.4.2 Uplift Anchorage at Wall Ends
89	B5.3.5 Design Deflection B5.4 Diaphragm Design B5.4.1 General
90	B5.4.2 Nominal Strength B5.4.3 Available Strength B5.4.4 Design Deflection
91	B5.4.4.1 Blocked Diaphragms B5.4.4.2 Unblocked Diaphragms
92	B5.4.5 Beam Diaphragm Tests for Non-Steel Sheathed Assemblies
93	C. INSTALLATION C1 General C2 Material Condition C2.1 Web Holes C2.2 Cutting and Patching C2.3 Splicing C3 Structural Framing C3.1 Foundation
94	C3.2 Ground Contact C3.3 Floors C3.3.1 Plumbness and Levelness C3.3.2 Alignment C3.3.3 Bearing Width C3.3.4 Web Separation C3.4 Walls C3.4.1 Straightness, Plumbness and Levelness C3.4.2 Alignment C3.4.3 Stud-to-Track Connection
95	C3.4.4 Back-to-Back and Box Headers C3.4.5 Double and Single L-Headers C3.4.6 Inverted L-Header Assemblies
97	C3.5 Roofs and Ceilings C3.5.1 Plumbness and Levelness C3.5.2 Alignment C3.5.3 End Bearing C3.6 Lateral Force-Resisting Systems C3.6.1 Shear Walls C3.6.2 Strap Braced Walls C3.6.3 Diaphragms C4 Connections
98	C4.1 Screw Connections C4.1.1 Steel-to-Steel Screws C4.1.2 Installation C4.1.3 Stripped Screws C4.2 Welded Connections C5 Miscellaneous C5.1 Utilities C5.1.1 Holes C5.1.2 Plumbing C5.1.3 Electrical
99	C5.2 Insulation C5.2.1 Mineral Fiber Insulation C5.2.2 Other Insulation
100	D. QUALITY CONTROL AND QUALITY ASSURANCE D1 General D1.1 Scope and Limits of Applicability D1.2 Responsibilities D2 Quality Control Programs
101	D3 Quality Control Documents D3.1 Documents to be Submitted D3.1.1 Additional Requirements for Lateral Force-Resisting Systems D3.1.1.1 Component Assemblies D3.1.1.2 Other Than Component Assemblies D3.1.1.3 Exceptions to Sections D3.1.1.1 and D3.1.1.2 D3.2 Available Documents
102	D4 Quality Assurance Agency Documents D5 Inspection Personnel D5.1 Quality Control Inspector
103	D5.2 Quality Assurance Inspector D6 Inspection Tasks D6.1 General D6.2 Quality Control Inspection Tasks D6.3 Quality Assurance Inspection Tasks
104	D6.4 Coordinated Inspection D6.5 Material Verification
105	D6.6 Inspection of Welding
106	D6.7 Inspection of Mechanical Fastening
107	D6.8 Inspection of Cold-Formed Steel Light-Frame Construction D6.9 Additional Requirements for Lateral Force-Resisting Systems
108	D6.9.1 Fit-Up of Welds
109	D7 Nonconforming Material and Workmanship D7.1 Additional Inspections D7.2 Rejection of Material
110	E. TRUSSES E1 General E1.1 Scope and Limits of Applicability E2 Truss Responsibilities E3 Loading E4 Truss Design E4.1 Materials E4.2 Corrosion Protection E4.3 Analysis E4.4 Member Design E4.4.1 Properties of Sections
111	E4.4.2 Compression Chord Members
114	E4.4.3 Tension Chord Members E4.4.4 Compression Web Members E4.4.5 Tension Web Members
115	E4.4.6 Eccentricity in Joints E4.5 Gusset Plate Design
116	E4.6 Connection Design E4.6.1 Fastening Methods E4.6.2 Coped Connections for C-Shaped Sections
117	E4.7 Serviceability E5 Quality Criteria for Steel Trusses E5.1 Manufacturing Quality Criteria E5.2 Member Identification E5.3 Assembly
118	E6 Truss Installation E6.1 Installation Tolerances E6.1.1 Straightness E6.1.2 Plumbness E6.1.3 Top Chord Bearing Trusses E7 Test-Based Design
120	F. TESTING F1 General F2 Truss Components and Assemblies
121	APPENDIX 1, CONTINUOUSLY BRACED DESIGN FOR DISTORTIONAL BUCKLING RESISTANCE
124	APPENDIX 2, TEST METHODS FOR TRUSS COMPONENTS AND ASSEMBLIES 2.1 Component Structural Performance Load Test 2.1.1 Flexural Test 2.1.1.1 Number of Test Specimens 2.1.1.2 Materials 2.1.1.3 Test Apparatus 2.1.1.4 Load and Deflection Measuring Devices 2.1.1.5 Loading Procedures 2.1.1.6 Interpretation of Test Results 2.1.1.7 Report
125	2.1.2 Compression Test 2.2 Full-Scale Confirmatory Load Test 2.2.1 Test Specimen 2.2.2 Number of Test Specimens 2.2.3 Materials 2.2.4 Fabrication 2.2.5 Test Apparatus
126	2.2.6 Load and Deflection Measuring Devices 2.2.7 Loading Procedures 2.2.7.1 Tests to Confirm Deflection 2.2.7.2 Tests to Confirm Available Strength [Factored Resistance] Assumptions
127	2.2.8 Interpretation of Test Results 2.2.9 Report 2.3 Full-Scale Structural Performance Load Test 2.3.1 Test Specimen 2.3.2 Number of Test Specimens 2.3.3 Materials 2.3.4 Fabrication 2.3.5 Test Apparatus
128	2.3.6 Load and Deflection Measuring Devices 2.3.7 Loading Procedures 2.3.8 Interpretation of Test Results
129	2.3.9 Report
131	DISCLAIMER
132	PREFACE
138	COMMENTARY ON THENORTH AMERICAN STANDARD FOR COLD-FORMED STEEL STRUCTURAL FRAMING A. GENERAL A1 Scope
139	A2 Definitions A2.1 Terms
141	A3 Material A4 Corrosion Protection
142	A5 Products
143	A5.2 Minimum Flange Width
144	B DESIGN B1 General B1.1 Loads and Load Combinations B1.1.1 Live Load Reduction on Wall Studs B1.1.2 Wind Loading Considerations in the United States and Mexico
145	B1.2 Design Basis B1.2.1 Floor Joists, Ceiling Joists and Roof Rafters B1.2.2 Wall Studs
146	B1.2.3 In-Line Framing
147	B1.2.5.2 Principles of Mechanics B1.3 Built-Up Sections
148	B1.5 Connection Design B1.5.1 Screw Connections B1.5.1.1 Steel-to-Steel Screws
149	B1.5.1.3 Spacing and Edge Distance B1.5.1.4 Gypsum Board
150	B1.5.2 Welded Connections B1.5.3 Bolts B1.5.4 Power-Actuated Fasteners B1.5.5 Other Connectors B2 Floor and Ceiling Framing B2.5 Bearing Stiffeners B2.6 Bracing Design B3 Wall Framing B3.2 Wall Stud Design B3.2.1 Axial Load
153	B3.2.5 Web Crippling B3.2.5.1 Stud-to-Track Connection for C-Section Studs
155	B3.2.5.2 Deflection Track Connection for C-Section Studs
156	B3.3 Header Design B3.3.1 Back-to-Back Headers B3.3.2 Box Headers
157	B3.3.3 Double L-Headers
158	B3.3.3.1.1 Gravity Loading B3.3.3.1.2 Uplift Loading B3.3.4 Single L-Headers
159	B3.3.5 Inverted L-Header Assemblies
160	B3.4 Bracing B3.4.1 Intermediate Brace Design B3.5 Serviceability B4 Roofing Framing B4.5 Bracing Design B5 Lateral Force-Resisting Systems B5.2 Shear Wall Design
161	B5.2.1 General
162	B5.2.2 Nominal Strength [Resistance] B5.2.2.1 Type I Shear Walls
165	B5.2.2.2 Type II Shear Walls
166	B5.2.3 Available Strength [Factored Resistance] B5.2.5 Design Deflection
167	B5.3 Strap Braced Wall Design
168	B5.4 Diaphragm Design B5.4.1 General B5.4.2 Nominal Strength
169	B5.4.4 Design Deflection B5.4.5 Beam Diaphragm Tests for Non-Steel Sheathed Assemblies
171	C. INSTALLATION C2 Material Condition C2.1 Web Holes C2.2 Cutting and Patching C2.3 Splicing C3 Structural Framing C3.1 Foundation C3.2 Ground Contact
172	C3.3 Floors C3.4 Walls C3.4.1 Straightness, Plumbness and Levelness C3.4.3 Stud-to-Track Connection
173	C3.5 Roofs and Ceilings C3.6 Lateral Force-Resisting Systems
174	C4 Connections C4.1 Screw Connections C4.1.2 Installation C4.1.3 Stripped Screws C4.2 Welded Connections C5 Miscellaneous C5.1 Utilities C5.1.1 Holes
175	C5.1.2 Plumbing C5.1.3 Electrical C5.2 Insulation
176	D. QUALITY CONTROL AND QUALITY ASSURANCE D1 General D1.1 Scope and Limits of Applicability
177	D1.2 Responsibilities D2 Quality Control Programs
178	D3 Quality Control Documents D3.1 Documents to be Submitted D3.2 Available Documents
179	D5 Inspection Personnel D5.1 Quality Control Inspector D5.2 Quality Assurance Inspector D6 Inspection Tasks D6.1 General D6.2 Quality Control Inspection Tasks
180	D6.3 Quality Assurance Inspection Tasks D6.4 Coordinated Inspection D6.5 Material Verification D6.6 Inspection of Welding D6.7 Inspection of Mechanical Fastening D6.8 Inspection of Cold-Formed Steel Light-Frame Construction D6.9 Additional Requirements for Lateral Force-Resisting Systems
182	E. TRUSSES E1 General E1.1 Scope and Limits of Applicability E2 Truss Responsibilities E3 Loading E4 Truss Design E4.3 Analysis E4.4 Member Design E4.4.1 Properties of Sections
183	E4.4.2 Compression Chord Members
184	E4.4.3 Tension Chord Members E4.4.4 Compression Web Members
185	E4.4.5 Tension Web Members E4.4.6 Eccentricity in Joints
186	E4.5 Gusset Plate Design
188	E4.6 Connection Design E4.6.1 Fastening Methods
189	E4.6.2 Coped Connections for C-Shaped Sections
190	E4.7 Serviceability E5 Quality Criteria for Steel Trusses
191	E6 Truss Installation E6.1.1 Straightness E6.1.2 Plumbness E7 Test-Based Design
192	F. TESTING F1 General F2 Truss Components and Assemblies
193	APPENDIX 1, CONTINUOUSLY BRACED DESIGN FOR DISTORTIONAL BUCKLING RESISTANCE
194	APPENDIX 2, TEST METHODS FOR TRUSS COMPONENTS AND ASSEMBLIES 2.1 Component Structural Performance Load Test 2.2 Full-Scale Confirmatory Load Test
195	2.3 Full-Scale Structural Performance Load Test
196	REFERENCES