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eLibrary >
AISI S400-15 wS1-16: North American Standard for Seismic Design of Cold-Formed Steel Structural Systems, 2015 Edition with Supplement 1 >
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AISI S400-15 wS1-16: North American Standard for Seismic Design of Cold-Formed Steel Structural Systems, 2015 Edition with Supplement 1, 2015
- NORTH AMERICAN STANDARD FOR SEISMIC DESIGN OF COLD-FORMED STEEL STRUCTURAL SYSTEMSWITH SUPPLEMENT 1 [Go to Page]
- DISCLAIMER
- PREFACE
- COMMITTEES THAT APPROVE AISI S400-15 (2015) [Go to Page]
- LATERAL DESIGN SUBCOMMITTEE (2015)
- COMMITTEES THAT APPROVE SUPPLEMENT 1 TO AISI S400-15 (2016) [Go to Page]
- LATERAL DESIGN SUBCOMMITTEE (2016)
- NORTH AMERICAN STANDARD FOR SEISMIC DESIGN OF COLD-FORMED STEEL STRUCTURAL SYSTEMSWITH SUPPLEMENT 1 [Go to Page]
- A. GENERAL [Go to Page]
- A1 Scope and Applicability [Go to Page]
- A1.1 Scope
- A1.2 Applicability
- A2 Definitions [Go to Page]
- A2.1 Terms
- A3 Materials [Go to Page]
- A3.1 Material Specifications
- A3.2 Expected Material Properties [Go to Page]
- A3.2.1 Material Expected Yield Stress [Probable Yield Stress]
- A3.2.2 Material Expected Tensile Strength [Probable Tensile Strength]
- A3.2.3 Material Modified Expected Yield Stress [Modified Probable Yield Stress]
- A3.3 Consumables for Welding
- A4 Structural Design Drawings and Specifications
- A5 Reference Documents
- B. GENERAL DESIGN REQUIREMENTS [Go to Page]
- B1 General Seismic Design Requirements [Go to Page]
- B1.1 General
- B1.2 Load Path
- B1.3 Deformation Compatibility of Members and Connections Not in the Seismic Force-Resisting System
- B1.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- B1.5 Seismic Load Effects From Other Concrete or Masonry Components
- B2 Lateral Force-Resisting System
- B3 Design Basis [Go to Page]
- B3.1 Nominal Strength [Resistance]
- B3.2 Available Strength [Factored Resistance]
- B3.3 Expected Strength [Probable Resistance]
- B3.4 Required Strength [Effects of Factored Loads]
- C. ANALYSIS [Go to Page]
- C1 Seismic Load Effects
- D. GENERAL MEMBER AND CONNECTION DESIGN REQUIREMENTS
- E. SEISMIC FORCE-RESISTING SYSTEMS [Go to Page]
- E1 Cold-Formed Steel Light Frame Shear Walls Sheathed With Wood Structural Panels [Go to Page]
- E1.1 Scope
- E1.2 Basis of Design [Go to Page]
- E1.2.1 Designated Energy-Dissipating Mechanism
- E1.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E1.2.3 Type I or Type II Shear Walls
- E1.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E1.3 Shear Strength [Resistance] [Go to Page]
- E1.3.1 Nominal Strength [Resistance] [Go to Page]
- E1.3.1.1 Type I Shear Walls
- E1.3.1.2 Type II Shear Walls
- E1.3.2 Available Strength [Factored Resistance]
- E1.3.3 Expected Strength [Probable Resistance]
- E1.4 System Requirements [Go to Page]
- E1.4.1 Type I Shear Walls [Go to Page]
- E1.4.1.1 Limitations for Tabulated Systems
- E1.4.1.2 Required Strength [Effect of Factored Loads] for Chord Studs, Anchorage, and Collectors
- E1.4.1.3 Required Strength [Effect of Factored Loads] for Foundations
- E1.4.1.4 Design Deflection
- E1.4.2 Type II Shear Walls [Go to Page]
- E1.4.2.1 Additional Limitations
- E1.4.2.2 Required Strength [Effect of Factored Loads] for Chord Studs, Anchorage, and Collectors
- E1.4.2.3 Design Deflection
- E2 Cold-Formed Steel Light Frame Shear Walls With Steel Sheet Sheathing [Go to Page]
- E2.1 Scope
- E2.2 Basis of Design [Go to Page]
- E2.2.1 Designated Energy-Dissipating Mechanism
- E2.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E2.2.3 Type I or Type II Shear Walls
- E2.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E2.3 Shear Strength [Resistance] [Go to Page]
- E2.3.1 Nominal Strength [Resistance] [Go to Page]
- E2.3.1.1 Type I Shear Walls
- E2.3.1.2 Type II Shear Walls
- E2.3.2 Available Strength [Factored Resistance]
- E2.3.3 Expected Strength [Probable Resistance]
- E2.4 System Requirements [Go to Page]
- E2.4.1 Type I Shear Walls [Go to Page]
- E2.4.1.1 Limitations for Tabulated Systems
- E2.4.1.2 Required Strength [Effect of Factored Loads] for Chord Studs, Anchorage, and Collectors
- E2.4.1.3 Required Strength [Effect of Factored Loads] for Foundations
- E2.4.1.4 Design Deflection
- E2.4.2 Type II Shear Walls [Go to Page]
- E2.4.2.1 Additional Limitations
- E2.4.2.2 Required Strength [Effects of Factored Loads] for Chord Studs, Anchorage, and Collectors
- E2.4.2.3 Design Deflection
- E3 Cold-Formed Steel Light Frame Strap Braced Wall Systems [Go to Page]
- E3.1 Scope
- E3.2 Basis of Design [Go to Page]
- E3.2.1 Designated Energy-Dissipating Mechanism
- E3.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E3.2.3 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E3.3 Shear Strength [Resistance] [Go to Page]
- E3.3.1 Nominal Strength [Resistance]
- E3.3.2 Available Strength [Factored Resistance]
- E3.3.3 Expected Strength [Probable Resistance]
- E3.4 System Requirements [Go to Page]
- E3.4.1 Limitations on System
- E3.4.2 Required Strength [Effect Due to Factored Loads] for Seismic Force-Resisting System
- E3.4.3 Required Strength [Effect Due to Factored Loads] for Foundations
- E3.4.4 Design Deflection
- E4 Cold-Formed Steel Special Bolted Moment Frames (CFS–SBMF) [Go to Page]
- E4.1 Scope
- E4.2 Basis of Design [Go to Page]
- E4.2.1 Designated Energy-Dissipating Mechanism
- E4.2.2 Seismic Design Parameters for Seismic Force-Resisting System
- E4.2.3 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E4.3 Strength [Go to Page]
- E4.3.1 Required Strength [Go to Page]
- E4.3.1.1 Beams and Columns
- E4.3.1.2 Bolt Bearing Plates
- E4.3.2 Available Strength
- E4.3.3 Expected Strength
- E4.4 System Requirements [Go to Page]
- E4.4.1 Limitations on System
- E4.4.2 Beams
- E4.4.3 Columns
- E4.4.4 Connections, Joints and Fasteners [Go to Page]
- E4.4.4.1 Bolted Joints
- E4.4.4.2 Welded Joints
- E4.4.4.3 Other Joints and Connections
- E5 Cold-Formed Steel Light Frame Shear Walls With Wood-Based Structural Panel Sheathing on One Side and Gypsum Board Panel Sheathing on the Other Side [Go to Page]
- E5.1 Scope
- E5.2 Basis of Design [Go to Page]
- E5.2.1 Designated Energy-Dissipating Mechanism
- E5.2.2 Seismic Force Modification Factors and Limitations for Seismic Force-Resisting System
- E5.2.3 Type I Shear Walls
- E5.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E5.3 Shear Resistance [Go to Page]
- E5.3.1 Nominal Resistance [Go to Page]
- E5.3.1.1 Type I Shear Walls
- E5.3.2 Factored Resistance
- E5.3.3 Probable Resistance
- E5.4 System Requirements [Go to Page]
- E5.4.1 Type I Shear Walls [Go to Page]
- E5.4.1.1 Limitations for Tabulated Systems
- E5.4.1.2 Effect of Factored Loads for Chord Studs, Anchorage, and Collectors
- E5.4.1.3 Effect of Factored Loads for Foundations
- E5.4.1.4 Design Deflection
- E6 Cold-Formed Steel Light Frame Shear Walls With Gypsum Board or Fiberboard Panel Sheathing [Go to Page]
- E6.1 Scope
- E6.2 Basis of Design [Go to Page]
- E6.2.1 Designated Energy-Dissipating Mechanism
- E6.2.2 Seismic Design Parameters for Seismic Force-Resisting System
- E6.2.3 Type I Shear Walls
- E6.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E6.3 Shear Strength [Go to Page]
- E6.3.1 Nominal Strength [Go to Page]
- E6.3.1.1 Type I Shear Walls
- E6.3.2 Available Strength
- E6.3.3 Expected Strength
- E6.4 System Requirements [Go to Page]
- E6.4.1 Type I Shear Walls [Go to Page]
- E6.4.1.1 Limitations for Tabulated Systems
- E6.4.1.2 Required Strength for Chord Studs, Anchorage, and Collectors
- E6.4.1.3 Required Strength for Foundations
- E6.4.1.4 Design Deflection
- E7 Conventional Construction Cold-Formed Steel Light Frame Strap Braced Wall Systems [Go to Page]
- E7.1 Scope
- E7.2 Basis of Design [Go to Page]
- E7.2.1 Designated Energy-Dissipating Mechanism
- E7.2.2 Seismic Force Modification Factors and Limitations for Seismic Force-Resisting System
- E7.2.3 Wall Aspect Ratio
- E7.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E7.3 Shear Resistance [Go to Page]
- E7.3.1 Nominal Resistance
- E7.3.2 Factored Resistance
- E7.4 System Requirements [Go to Page]
- E7.4.1 Limitations on System
- E7.4.2 Effect of Eccentricity
- E7.4.3 Design Deflection
- F. DIAPHRAGMS [Go to Page]
- F1 General [Go to Page]
- F1.1 Scope
- F1.2 Design Basis
- F1.3 Required Strength [Go to Page]
- F1.3.1 Diaphragm Stiffness
- F1.3.2 Seismic Load Effects Including Overstrength
- F1.4 Shear Strength [Go to Page]
- F1.4.1 Nominal Strength [Go to Page]
- F1.4.1.1 Diaphragms Sheathed With Wood Structural Panels
- F1.4.2 Available Strength
- F2 Cold-Formed Steel Diaphragms Sheathed With Wood Structural Panels [Go to Page]
- F2.1 Scope
- F2.2 Additional Design Requirements [Go to Page]
- F2.2.1 Seismic Detailing Requirements
- F2.2.2 Seismic Load Effects Contributed by Masonry and Concrete Walls
- F2.3 Required Strength [Go to Page]
- F2.3.1 Diaphragm Stiffness
- F2.4 Shear Strength [Go to Page]
- F2.4.1 Nominal Strength [Go to Page]
- F2.4.1.1 Requirements for Tabulated Systems
- F2.4.2 Available Strength
- F2.4.3 Design Deflection
- F2.5 Requirements Where the Seismic Response Modification Coefficient, R, is Greater Than Three [Go to Page]
- F2.5.1 Open Front Structures
- F2.5.2 Member Requirements
- F3 Other Diaphragms
- G. QUALITY CONTROL AND QUALITY ASSURANCE [Go to Page]
- G1 Cold-Formed Steel Light Frame Shear Walls Sheathed With Wood Structural Panels
- G2 Cold-Formed Steel Light Frame Shear Walls Sheathed with Steel Sheets
- G3 Cold-Formed Steel Light Frame Strap Braced Wall Systems
- G4 Cold-Formed Steel Special Bolted Moment Frames (CFS–SBMF) [Go to Page]
- G4.1 Cooperation
- G4.2 Rejections
- G4.3 Inspection of Welding
- G4.4 Inspection of Bolted Connections
- G4.5 Identification of Steel
- G5 Cold-Formed Steel Light Frame Shear Walls Sheathed With Wood-Based Structural Panels and Gypsum Board Panels in Combination
- G6 Cold-Formed Steel Light Frame Shear Walls Sheathed With Gypsum Board or Fiberboard Panels
- H. Use of Substitute Components and Connections in Seismic Force-Resisting Systems
- APPENDIX 1, SEISMIC FORCE MODIFICATION FACTORS AND LIMITATIONS IN CANADA [Go to Page]
- 1.1 Scope and Applicability
- 1.2 Seismic Force Modification Factors and Limitations in Canada
- COMMENTARY ON NORTH AMERICAN STANDARD FOR SEISMIC DESIGN OF COLD-FORMED STEEL STRUCTURAL SYSTEMS WITH SUPPLEMENT 1 [Go to Page]
- DISCLAIMER
- PREFACE
- TABLE OF CONTENTS
- COMMENTARY ON NORTH AMERICAN STANDARD FOR SEISMIC DESIGN OF COLD-FORMED STEEL STRUCTURAL SYSTEMS WITH SUPPLEMENT 1 [Go to Page]
- A. GENERAL [Go to Page]
- A1 Scope and Applicability [Go to Page]
- A1.1 Scope
- A1.2 Applicability
- A2 Definitions [Go to Page]
- A2.1 Terms
- A3 Materials [Go to Page]
- A3.2 Expected Material Properties [Go to Page]
- A3.2.1 Material Expected Yield Stress [Probable Yield Stress]
- A3.2.2 Material Expected Tensile Strength [Probable Tensile Strength]
- A3.2.3 Material Modified Expected Yield Stress [Modified Probable Yield Stress]
- A3.3 Consumables for Welding
- A4 Structural Design Drawings and Specifications
- A5 Reference Documents
- B. GENERAL DESIGN REQUIREMENTS [Go to Page]
- B1 General Seismic Design Requirements [Go to Page]
- B1.1 General
- B1.2 Load Path
- B1.3 Deformation Compatibility of Members and Connections Not in the Seismic Force-Resisting System
- B1.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- B1.5 Seismic Load Effects From Other Concrete or Masonry Components
- B2 Lateral Force-Resisting System
- B3 Design Basis [Go to Page]
- B3.3 Expected Strength [Probable Resistance]
- C. ANALYSIS [Go to Page]
- C1 Seismic Load Effects
- D. GENERAL MEMBER AND CONNECTION DESIGN REQUIREMENTS
- E. SEISMIC FORCE-RESISTING SYSTEMS [Go to Page]
- E1 Cold-Formed Steel Light Frame Shear Walls Sheathed With Wood Structural Panels [Go to Page]
- E1.1 Scope [Go to Page]
- E1.2.1 Designated Energy-Dissipating Mechanism
- E1.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E1.2.3 Type I or Type II Shear Walls
- E1.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E1.2 Basis of Design
- E1.3 Shear Strength [Resistance] [Go to Page]
- E1.3.1.1 Type I Shear Walls
- E1.3.1.2 Type II Shear Walls
- E1.3.2 Available Strength [Factored Resistance]
- E1.3.3 Expected Strength [Probable Resistance]
- E1.4 System Requirements [Go to Page]
- E1.4.1 Type I Shear Walls [Go to Page]
- E1.4.1.1 Limitations for Tabulated Systems
- E1.4.1.2 Required Strength [Effect Due to Factored Loads] for Chord Studs, Anchorage, and Collectors
- E1.4.1.3 Required Strength [Effect Due to Factored Loads] for Foundations
- E1.4.1.4 Design Deflection
- E1.4.2 Type II Shear Walls [Go to Page]
- E1.4.2.1 Additional Limitations
- E1.4.2.2 Required Strength [Effect Due to Factored Loads] for Chord Studs, Anchorage, and Collectors
- E1.4.2.3 Design Deflection
- E2 Cold-Formed Steel Light Frame Shear Walls With Steel Sheet Sheathing [Go to Page]
- E2.2 Basis of Design [Go to Page]
- E2.2.1 Designated Energy -Dissipating Mechanism
- E2.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E2.2.3 Type I or Type II Shear Walls
- E2.2.4 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E2.3 Shear Strength [Resistance] [Go to Page]
- E2.3.1 Nominal Strength [Resistance] [Go to Page]
- E2.3.1.1 Type I Shear Walls
- E2.3.1.2 Type II Shear Walls
- E2.3.2 Available Strength [Factored Resistance]
- E2.3.3 Expected Strength [Probable Resistance]
- E2.4 System Requirements [Go to Page]
- E2.4.1 Type I Shear Walls [Go to Page]
- E2.4.1.1 Limitations for Tabulated Systems
- E2.4.1.2 Required Strength [Effect Due to Factored Loads] for Chord Studs, Anchorage, and Collectors
- E2.4.1.3 Required Strength [Effect Due to Factored Loads] for Foundations
- E2.4.1.4 Design Deflection
- E2.4.2 Type II Shear Walls
- E3 Cold-Formed Steel Light Frame Strap Braced Wall Systems [Go to Page]
- E3.2 Basis of Design [Go to Page]
- E3.2.1 Designated Energy-Dissipating Mechanism
- E3.2.2 Seismic Design Parameters [Seismic Force Modification Factors and Limitations] for Seismic Force-Resisting System
- E3.2.3 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E3.3 Shear Strength [Resistance] [Go to Page]
- E3.3.1 Nominal Strength [Resistance]
- E3.3.2 Available Strength [Factored Resistance]
- E3.3.3 Expected Strength [Probable Resistance]
- E3.4 System Requirements [Go to Page]
- E3.4.1 Limitations on System
- E3.4.2 Required Strength [Effect of Factored Loads] for Seismic Force-Resisting System
- E3.4.3 Required Strength [Effect of Factored Loads] for Foundations
- E3.4.4 Design Deflection
- E4 Cold-Formed Steel Special Bolted Moment Frames (CFS–SBMF) [Go to Page]
- E4.1 Scope
- E4.2 Basis of Design [Go to Page]
- E4.2.1 Designated Energy- Dissipating Mechanism
- E4.2.2 Seismic Design Parameters for Seismic Force-Resisting System
- E4.2.3 Seismic Load Effects Contributed by Masonry and Concrete Walls
- E4.3 Strength [Go to Page]
- E4.3.1 Required Strength [Go to Page]
- E4.3.1.1 Beams and Columns
- E4.3.1.2 Bolt Bearing Plates
- E4.3.2 Available Strength
- E4.3.3 Expected Strength
- E4.4 System Requirements [Go to Page]
- E4.4.1 Limitations on System
- E4.4.2 Beams
- E4.4.3 Columns
- E4.4.4 Connections, Joints and Fasteners [Go to Page]
- E4.4.4.1 Bolted Joints
- E4.4.4.2 Welded Joints
- E4.4.4.3 Other Joints and Connections
- E5 Cold-Formed Steel Light Frame Shear Walls With Wood Structural Panel Sheathing on One Side and Gypsum Board Panel Sheathing on the Other Side [Go to Page]
- E5.1 Scope
- E5.2 Basis of Design
- E5.3 Shear Resistance
- E5.4 System Requirements
- E6 Cold-Formed Steel Light Frame Shear Walls With Gypsum Board or Fiberboard Panel Sheathing [Go to Page]
- E6.1 Scope
- E6.2 Basis of Design
- E6.3 Shear Strength
- E6.4 System Requirements
- E7 Conventional Construction Cold-Formed Steel Light Frame Strap Braced Wall Systems [Go to Page]
- E7.1 Scope
- E7.2 Basis of Design
- E7.3 Shear Resistance
- E7.4 System Requirements
- F. DIAPHRAGMS [Go to Page]
- F1 General [Go to Page]
- F1.1 Scope
- F1.2 Design Basis
- F1.3 Required Strength
- F1.4 Shear Strength
- F2 Cold-Formed Steel Diaphragms Sheathed With Wood Structural Panels [Go to Page]
- F2.1 Scope
- F2.2 Additional Design Requirements
- F2.3 Required Strength
- F2.4 Shear Strength [Go to Page]
- F2.4.1 Nominal Strength
- F2.4.2 Available Strength
- F2.4.3 Design Deflection
- F2.5 Requirements Where Seismic Response Modification Coefficient, R, Greater Than Three
- F3 Other Diaphragms
- G. QUALITY CONTROL AND QUALITY ASSURANCE
- H. USE OF SUBSTITUTE COMPONENTS AND CONNECTIONS IN SEISMIC FORCE-RESISTING SYSTEMS
- APPENDIX 1, SEISMIC FORCE MODIFICATION FACTORS AND LIMITATIONS IN CANADA
- REFERENCES [Go to Page]
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