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AISI S100 2016 RA 2020 wS2

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AISI S100-16 (2020) w/S2-20, North American Specification for the Design of Cold-Formed Steel Structural Members (Reaffirmed 2020) With Supplement 2, 2020 Edition

Published By Publication Date Number of Pages
AISI 2016 505
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PDF Pages PDF Title
3 DISCLAIMER
4 DEDICATION
6 PREFACE
56 A. GENERAL PROVISIONS
A1 Scope, Applicability, and Definitions
A1.1 Scope
A1.2 Applicability
57 A1.3 Definitions
63 A1.4 Units of Symbols and Terms
64 A2 Referenced Specifications, Codes, and Standards
67 A2.1 Referenced Specifications, Codes, and Standards for United States and Mexico
A2.2 Referenced Specifications, Codes, and Standards for Canada
68 A3 Material
A3.1 Applicable Steels
A3.1.1 Steels With a Specified Minimum Elongation of Ten Percent or Greater (Elongation ( 10%)
70 A3.1.2 Steels With a Specified Minimum Elongation From Three Percent to Less Than Ten Percent (3% ( Elongation ( 10%)
A3.1.3 Steels With a Specified Minimum Elongation of Less Than Three Percent (Elongation ( 3%)
72 A3.2 Other Steels
A3.2.1 Ductility Requirements of Other Steels
73 A3.2.1.1 Restrictions for Curtain Wall Studs
A3.3 Yield Stress and Strength Increase From Cold Work of Forming
A3.3.1 Yield Stress
A3.3.2 Strength Increase From Cold Work of Forming
75 B. DESIGN REQUIREMENTS
B1 General Provisions
B2 Loads and Load Combinations
B3 Design Basis
B3.1 Required Strength [Effect Due to Factored Loads]
76 B3.2 Design for Strength
B3.2.1 Allowable Strength Design (ASD) Requirements
B3.2.2 Load and Resistance Factor Design (LRFD) Requirements
B3.2.3 Limit States Design (LSD) Requirements
77 B3.3 Design for Structural Members
B3.4 Design for Connections
B3.4.1 Design for Anchorage to Concrete
B3.5 Design for Stability
B3.6 Design of Structural Assemblies and Systems
B3.7 Design for Serviceability
78 B3.8 Design for Ponding
B3.9 Design for Fatigue
B3.10 Design for Corrosion Effects
B4 Dimensional Limits and Considerations
B4.1 Limitations for Use of the Effective Width Method or the Direct Strength Method
80 B4.2 Members Falling Outside the Applicability Limits
B4.3 Shear Lag Effects—Short Spans Supporting Concentrated Loads
81 B5 Member Properties
B6 Fabrication and Erection
B7 Quality Control and Quality Assurance
B7.1 Delivered Minimum Thickness
B8 Evaluation of Existing Structures
82 C. DESIGN FOR STABILITY
C1 Design for System Stability
C1.1 Direct Analysis Method Using Rigorous Second-Order Elastic Analysis
C1.1.1 Determination of Required Strengths
C1.1.1.1 Analysis
83 C1.1.1.2 Consideration of Initial Imperfections
84 C1.1.1.3 Modification of Section Stiffness
C1.1.2 Determination of Available Strengths [Factored Resistances]
85 C1.2 Direct Analysis Method Using Amplified First-Order Elastic Analysis
C1.2.1 Determination of Required Strengths [Effects due to Factored Loads]
C1.2.1.1 Analysis
87 C1.2.1.2 Consideration of Initial Imperfections
C1.2.1.3 Modification of Section Stiffness
C1.2.2 Determination of Available Strengths [Factored Resistances]
C1.3 Effective Length Method
88 C1.3.1 Determination of Required Strengths [Effects of Factored Loads]
C1.3.1.1 Analysis
C1.3.1.2 Consideration of Initial Imperfections
C1.3.2 Determination of Available Strengths [Factored Resistances]
89 C2 Member Bracing
C2.1 Symmetrical Beams and Columns
C2.2 C-Section and Z-Section Beams
C2.2.1 Neither Flange Connected to Sheathing That Contributes to the Strength and Stability of the C- or Z-Section
91 C2.2.2 Flange Connected to Sheathing That Contributes to the Strength and Stability of the C- or Z-Section
C2.3 Bracing of Axially Loaded Compression Members
93 D. MEMBERS IN TENSION
D1 General Requirements
D2 Yielding of Gross Section
D3 Rupture of Net Section
94 E. MEMBERS IN COMPRESSION
E1 General Requirements
E2 Yielding and Global (Flexural, Flexural-Torsional, and Torsional) Buckling
95 E2.1 Sections Not Subject to Torsional or Flexural-Torsional Buckling
E2.1.1 Closed-Box Sections
E2.2 Doubly- or Singly-Symmetric Sections Subject to Torsional or Flexural-Torsional Buckling
96 E2.3 Point-Symmetric Sections
E2.4 Non-Symmetric Sections
97 E2.5 Sections With Holes
E3 Local Buckling Interacting With Yielding and Global Buckling
E3.1 Effective Width Method
E3.1.1 Members Without Holes
98 E3.1.1.1 Closed Cylindrical Tubular Sections
E3.1.2 Members With Circular Holes
E3.2 Direct Strength Method
E3.2.1 Members Without Holes
99 E3.2.2 Members With Holes
E4 Distortional Buckling
E4.1 Members Without Holes
100 E4.2 Members With Holes
101 F. MEMBERS IN FLEXURE
F1 General Requirements
F2 Yielding and Global (Lateral-Torsional) Buckling
F2.1 Initiation of Yielding Strength
102 F2.1.1 Singly- or Doubly- Symmetric Sections Bending About Symmetric Axis
103 F2.1.2 Singly-Symmetric Sections Bending About Centroidal Axis Perpendicular to Axis of Symmetry
104 F2.1.3 Point-Symmetric Sections
F2.1.4 Closed-Box Sections
105 F2.1.5 Other Cross-Sections
F2.2 Beams With Holes
F2.3 Initiation of Yielding Strength for Closed Cylindrical Tubular Sections
106 F2.4 Inelastic Reserve Strength
F2.4.1 Element-Based Method
107 F2.4.2 Direct Strength Method
108 F3 Local Buckling Interacting With Yielding and Global Buckling
F3.1 Effective Width Method
F3.1.1 Members Without Holes
109 F3.1.2 Members With Holes
F3.1.3 Members Considering Inelastic Reserve Strength
F3.2 Direct Strength Method
F3.2.1 Members Without Holes
F3.2.2 Members With Holes
110 F3.2.3 Members Considering Local Inelastic Reserve Strength
F4 Distortional Buckling
111 F4.1 Members Without Holes
F4.2 Members With Holes
112 F4.3 Members Considering Distortional Inelastic Reserve Strength
F5 Stiffeners
F5.1 Bearing Stiffeners
113 F5.2 Bearing Stiffeners in C-Section Flexural Members
114 F5.3 Nonconforming Stiffeners
115 G. MEMBERS IN SHEAR AND WEB CRIPPLING
G1 General Requirements
G2 Shear Strength of Webs Without Holes
G2.1 Flexural Members Without Transverse Web Stiffeners
116 G2.2 Flexural Members With Transverse Web Stiffeners
G2.3 Web Elastic Critical Shear Buckling Force, Vcr
117 G3 Shear Strength of C-Section Webs With Holes
118 G4 Transverse Web Stiffeners
G4.1 Conforming Transverse Web Stiffeners
119 G4.2 Nonconforming Transverse Web Stiffeners
G5 Web Crippling Strength of Webs Without Holes
124 G6 Web Crippling Strength of C-Section Webs With Holes
125 H. MEMBERS UNDER COMBINED FORCES
H1 Combined Axial Load and Bending
H1.1 Combined Tensile Axial Load and Bending
126 H1.2 Combined Compressive Axial Load and Bending
H2 Combined Bending and Shear
127 H3 Combined Bending and Web Crippling
129 H4 Combined Bending and Torsional Loading
131 I. ASSEMBLIES AND SYSTEMS
I1 Built-Up Sections
I1.1 Flexural Members Composed of Two Back-to-Back C-Sections
132 I1.2 Compression Members Composed of Two Sections in Contact
I1.3 Spacing of Connections in Cover-Plated Sections
133 I2 Floor, Roof, or Wall Steel Diaphragm Construction
I3 Mixed Systems
I4 Cold-Formed Steel Light-Frame Construction
I4.1 All-Steel Design of Wall Stud Assemblies
134 I5 Special Bolted Moment Frame Systems
I6 Metal Roof and Wall Systems
I6.1 Member Strength: General Cross-Sections and System Connectivity
I6.1.1 Compression Member Design
I6.1.1.1 Flexural, Torsional, or Flexural-Torsional Buckling
I6.1.1.2 Local Buckling
135 I6.1.1.3 Distortional Buckling
I6.1.2 Flexural Member Design
I6.1.2.1 Lateral-Torsional Buckling
I6.1.2.2 Local Buckling
I6.1.2.3 Distortional Buckling
I6.1.3 Member Design for Combined Flexure and Torsion
136 I6.2 Member Strength: Specific Cross-Sections and System Connectivity
I6.2.1 Flexural Members Having One Flange Through-Fastened to Deck or Sheathing
137 I6.2.2 Flexural Members Having One Flange Fastened to a Standing Seam Roof System
I6.2.3 Compression Members Having One Flange Through-Fastened to Deck or Sheathing
139 I6.2.4 Z-Section Compression Members Having One Flange Fastened to a Standing Seam Roof
I6.3 Standing Seam Roof Panel Systems
I6.3.1 Strength of Standing Seam Roof Panel Systems
140 I6.4 Roof System Bracing and Anchorage
I6.4.1 Anchorage of Bracing for Purlin Roof Systems Under Gravity Load With Top Flange Connected to Metal Sheathing
144 I6.4.2 Alternate Lateral and Stability Bracing for Purlin Roof Systems
145 I7 Rack Systems
146 J. CONNECTIONS AND JOINTS
J1 General Provisions
J2 Welded Connections
J2.1 Groove Welds in Butt Joints
147 J2.2 Arc Spot Welds
148 J2.2.1 Minimum Edge and End Distance
149 J2.2.2 Shear
J2.2.2.1 Shear Strength for Sheet(s) Welded to a Thicker Supporting Member
150 J2.2.2.2 Shear Strength for Sheet-to-Sheet Connections
151 J2.2.3 Tension
152 J2.2.4 Combined Shear and Tension on an Arc Spot Weld
153 J2.3 Arc Seam Welds
J2.3.1 Minimum Edge and End Distance
154 J2.3.2 Shear
J2.3.2.1 Shear Strength for Sheet(s) Welded to a Thicker Supporting Member
J2.3.2.2 Shear Strength for Sheet-to-Sheet Connections
155 J2.4 Top Arc Seam Sidelap Welds
J2.4.1 Shear Strength of Top Arc Seam Sidelap Welds
157 J2.5 Fillet Welds
158 J2.6 Flare Groove Welds
161 J2.7 Resistance Welds
162 J3 Bolted Connections
164 J3.1 Minimum Spacing
165 J3.2 Minimum Edge and End Distances
J3.3 Bearing
J3.3.1 Bearing Strength Without Consideration of Bolt Hole Deformation
166 J3.3.2 Bearing Strength With Consideration of Bolt Hole Deformation
167 J3.4 Shear and Tension in Bolts
J4 Screw Connections
J4.1 Minimum Spacing
J4.2 Minimum Edge and End Distances
168 J4.3 Shear
J4.3.1 Shear Strength Limited by Tilting and Bearing
J4.3.2 Shear in Screws
J4.4 Tension
J4.4.1 Pull-Out Strength
J4.4.2 Pull-Over Strength
170 J4.4.3 Tension in Screws
J4.5 Combined Shear and Tension
J4.5.1 Combined Shear and Pull-Over
171 J4.5.2 Combined Shear and Pull-Out
J4.5.3 Combined Shear and Tension in Screws
172 J5 Power-Actuated Fastener (PAF) Connections
173 J5.1 Minimum Spacing, Edge and End Distances
174 J5.2 Power-Actuated Fasteners (PAFs) in Tension
J5.2.1 Tension Strength of Power-Actuated Fasteners (PAFs)
J5.2.2 Pull-Out Strength
J5.2.3 Pull-Over Strength
175 J5.3 Power-Actuated Fasteners (PAFs) in Shear
J5.3.1 Shear Strength of Power-Actuated Fasteners (PAFs)
J5.3.2 Bearing and Tilting Strength
176 J5.3.3 Pull-Out Strength in Shear
J5.3.4 Net Section Rupture Strength
J5.3.5 Shear Strength Limited by Edge Distance
J5.4 Combined Shear and Tension
177 J6 Rupture
J6.1 Shear Rupture
178 J6.2 Tension Rupture
179 J6.3 Block Shear Rupture
180 J7 Connections to Other Materials
J7.1 Strength of Connection to Other Materials
J7.1.1 Bearing
J7.1.2 Tension
J7.1.3 Shear
181 K. STRENGTH FOR SPECIAL CASES
K1 Test Standards
182 K2 Tests for Special Cases
K2.1 Tests for Determining Structural Performance
K2.1.1 Load and Resistance Factor Design and Limit States Design
186 K2.1.2 Allowable Strength Design
187 K2.2 Tests for Confirming Structural Performance
K2.3 Tests for Determining Mechanical Properties
K2.3.1 Full Section
K2.3.2 Flat Elements of Formed Sections
188 K2.3.3 Virgin Steel
189 L. DESIGN FOR SERVICEABILITY
L1 Serviceability Determination for the Effective Width Method
L2 Serviceability Determination for the Direct Strength Method
L3 Flange Curling
190 M. DESIGN FOR FATIGUE
M1 General
192 M2 Calculation of Maximum Stresses and Stress Ranges
193 M3 Design Stress Range
M4 Bolts and Threaded Parts
M5 Special Fabrication Requirements
196 APPENDIX 1, EFFECTIVE WIDTH OF ELEMENTS
1.1 Effective Width of Uniformly Compressed Stiffened Elements
197 1.1.1 Uniformly Compressed Stiffened Elements With Circular or Noncircular Holes
199 1.1.2 Webs and Other Stiffened Elements Under Stress Gradient
201 1.1.3 C-Section Webs With Holes Under Stress Gradient
1.1.4 Uniformly Compressed Elements Restrained by Intermittent Connections
204 1.2 Effective Width of Unstiffened Elements
1.2.1 Uniformly Compressed Unstiffened Elements
1.2.2 Unstiffened Elements and Edge Stiffeners With Stress Gradient
207 1.3 Effective Width of Uniformly Compressed Elements With a Simple Lip Edge Stiffener
209 1.4 Effective Width of Stiffened Elements With Single or Multiple Intermediate Stiffeners or Edge-Stiffened Elements With Intermediate Stiffener(s)
1.4.1 Effective Width of Uniformly Compressed Stiffened Elements With Single or Multiple Intermediate Stiffeners
210 1.4.1.1 Specific Case: Single or n Identical Stiffeners, Equally Spaced
211 1.4.1.2 General Case: Arbitrary Stiffener Size, Location, and Number
212 1.4.2 Edge-Stiffened Elements With Intermediate Stiffener(s)
214 APPENDIX 2, ELASTIC BUCKLING ANALYSIS OF MEMBERS
2.1 General Provisions
215 2.2 Numerical Solutions
2.3 Analytical Solutions
216 2.3.1 Members Subject to Compression
2.3.1.1 Global Buckling (Fcre, Pcre)
217 2.3.1.2 Local Buckling (Fcr, Pcr)
2.3.1.3 Distortional Buckling (Fcrd, Pcrd)
219 2.3.2 Members With Holes Subject to Compression
2.3.2.1 Global Buckling (Fcre, Pcre) for Members With Holes
220 2.3.2.1.1 Sections With Holes Not Subject to Torsional or Flexural-Torsional Buckling
221 2.3.2.1.2 Doubly- or Singly-Symmetric Sections (With Holes) Subject to Torsional or Flexural-Torsional Buckling
2.3.2.1.3 Point Symmetric Sections With Holes
222 2.3.2.1.4 Non-Symmetric Sections With Holes
2.3.2.2 Local Buckling (Fcr, Pcr) for Members With Holes
223 2.3.2.3 Distortional Buckling (Fcrd, Pcrd) for Members With Holes
2.3.3 Members Subject to Flexure
2.3.3.1 Global Buckling (Fcre, Mcre)
2.3.3.2 Local Buckling (Fcr, Mcr)
224 2.3.3.3 Distortional Buckling (Fcrd, Mcrd)
225 2.3.4 Members With Holes Subject to Flexure
2.3.4.1 Global Buckling (Fcre, Mcre) for Members With Holes
2.3.4.1.1 Singly- or Doubly- Symmetric Sections (With Holes) Bending About Symmetric Axis
226 2.3.4.1.2 Point-Symmetric Sections (With Holes)
2.3.4.1.3 Closed-Boxed Section (With Holes)
2.3.4.2 Local Buckling (Fcr, Mcr) for Members With Holes
2.3.4.3 Distortional Buckling (Fcrd, Mcrd) for Members With Holes
227 2.3.5 Shear Buckling (Vcr)
232 APPENDIX A, PROVISIONS APPLICABLE TO THE UNITED STATES AND MEXICO
I6.2.2 Flexural Members Having One Flange Fastened to a Standing Seam Roof System
I6.2.4 Z-Section Compression Members Having One Flange Fastened to a Standing Seam Roof
233 I6.3.1a Strength of Standing Seam Roof Panel Systems
234 J2a Welded Connections
J3.4 Shear and Tension in Bolts
240 APPENDIX B, PROVISIONS APPLICABLE TO CANADA
C2a Lateral and Stability Bracing
C2.1 Symmetrical Beams and Columns
C2.1.1 Discrete Bracing for Beams
C2.1.2 Bracing by Deck, Slab, or Sheathing for Beams and Columns
C2.2a C-Section and Z-Section Beams
241 C2.2.2 Discrete Bracing
C2.2.3 One Flange Braced by Deck, Slab, or Sheathing
C2.2.4 Both Flanges Braced by Deck, Slab, or Sheathing
I2 Floor, Roof, or Wall Steel Diaphragm Construction
I4 Cold-Formed Steel Light-Frame Construction
I6a Metal Roof and Wall Systems
I6.2.2 Flexural Members Having One Flange Fastened to a Standing Seam Roof System
J2a Welded Connections
242 J3.4 Shear and Tension in Bolts
243 K2.1.1a Load and Resistance Factor Design and Limit States Design
245 DISCLAIMER
246 PREFACE
256 INTRODUCTION
258 A. GENERAL PROVISIONS
A1 Scope, Applicability, and Definitions
A1.1 Scope
A1.2 Applicability
259 A1.3 Definitions
264 A1.4 Units of Symbols and Terms
A2 Referenced Specifications, Codes, and Standards
265 A3 Material
A3.1 Applicable Steels
A3.1.1 Steels With a Specified Minimum Elongation of Ten Percent or Greater (Elongation ( 10%)
266 A3.1.2 Steels With a Specified Minimum Elongation From Three Percent to Less Than Ten Percent (3% ( Elongation < 10%)
A3.1.3 Steels With a Specified Minimum Elongation of Less Than Three Percent (Elongation < 3%)
267 A3.2 Other Steels
268 A3.2.1 Ductility Requirements of Other Steels
269 A3.2.1.1 Restrictions for Curtain Wall Studs
270 A3.3 Yield Stress and Strength Increase From Cold Work of Forming
A3.3.1 Yield Stress
271 A3.3.2 Strength Increase From Cold Work of Forming
276 B. DESIGN REQUIREMENTS
B1 General Provisions
B2 Loads and Load Combinations
B3 Design Basis
277 B3.1 Required Strength [Effect Due to Factored Loads]
B3.2 Design for Strength
B3.2.1 Allowable Strength Design (ASD) Requirements
B3.2.2 Load and Resistance Factor Design (LRFD) Requirements
283 B3.2.3 Limit States Design (LSD) Requirements
284 B3.3 Design of Structural Members
285 B3.4 Design of Connections
B3.5 Design for Stability
B3.6 Design of Structural Assemblies and Systems
B3.7 Design for Serviceability
286 B3.8 Design for Ponding
B3.9 Design for Fatigue
B3.10 Design for Corrosion Effects
287 B4 Dimensional Limits and Considerations
B4.1 Limitations for Use of the Effective Width Method or Direct Strength Method
288 B4.2 Members Falling Outside the Application Limits
289 B4.3 Shear Lag Effects — Short Spans Supporting Concentrated Loads
290 B5 Member Properties
B6 Fabrication and Erection
291 B7 Quality Control and Quality Assurance
B7.1 Delivered Minimum Thickness
B8 Evaluation of Existing Structures
292 C. DESIGN FOR STABILITY
C1 Design for System Stability
293 C1.1 Direct Analysis Method Using Rigorous Second-Order Elastic Analysis
296 C1.2 Direct Analysis Method Using Amplified First-Order Elastic Analysis
297 C1.3 Effective Length Method
298 C2 Member Bracing
299 C2.1 Symmetrical Beams and Columns
C2.2 C-Section and Z-Section Beams
C2.2.1 Neither Flange Connected to Sheathing That Contributes to the Strength and Stability of the Section
305 C2.2.2 Flange Connected to Sheathing That Contributes to the Strength and Stability of the C- or Z-Section
306 C2.3 Bracing of Axially Loaded Compression Members
308 D. MEMBERS IN TENSION
D2 Yielding of Gross Section
D3 Rupture of Net Section
309 E. MEMBERS IN COMPRESSION
E1 General Requirements
311 E2 Yielding and Global (Flexural, Flexural-Torsional and Torsional) Buckling
320 E2.1 Sections Not Subject to Torsional or Flexural-Torsional Buckling
321 E2.1.1 Closed-Box Section
E2.2 Doubly- or Singly-Symmetric Sections Subject to Torsional or Flexural-Torsional Buckling
322 E2.3 Point-Symmetric Sections
E2.4 Non-Symmetric Sections
E2.5 Sections With Holes
E3 Local Buckling Interacting With Yielding and Global Buckling
323 E3.1 Effective Width Method
324 E3.1.1 Members Without Holes
E3.1.1.1 Closed Cylindrical Tubular Sections
327 E3.1.2 Members With Circular Holes
E3.2 Direct Strength Method
E3.2.1 Members Without Holes
E3.2.2 Members With Holes
328 E4 Distortional Buckling
E4.1 Members Without Holes
329 E4.2 Members With Holes
331 F. MEMBERS IN FLEXURE
F1 General Requirements
334 F2 Yielding and Global (Lateral-Torsional) Buckling
F2.1 Initiation of Yielding Strength
339 F2.2 Beams With Holes
340 F2.3 Initiation of Yielding Strength [Resistance] for Closed Cylindrical Tubular Sections
341 F2.4 Inelastic Reserve Strength
F2.4.1 Element-Based Method
342 F2.4.2 Direct Strength Method
F3 Local Buckling Interacting With Yielding and Global Buckling
F3.1 Effective Width Method
345 F3.1.1 Members Without Holes
F3.1.2 Members With Holes
F3.1.3 Members Considering Inelastic Reserve Strength
F3.2 Direct Strength Method
F3.2.1 Members Without Holes
346 F3.2.2 Members With Holes
F3.2.3 Members Considering Local Inelastic Reserve Strength
347 F4 Distortional Buckling
F4.1 Members Without Holes
348 F4.2 Members With Holes
349 F4.3 Members Considering Distortional Inelastic Reserve Strength
F5 Stiffeners
F5.1 Bearing Stiffeners
350 F5.2 Bearing Stiffeners in C-Section Flexural Members
F5.3 Nonconforming Stiffeners
351 G. MEMBERS IN SHEAR AND WEB CRIPPLING
G1 General Requirements
G2 Shear Strength [Resistance] of Webs Without Holes
G2.1 Flexural Members Without Transverse Web Stiffeners
352 G2.2 Flexural Members With Transverse Web Stiffeners
G2.3 Web Elastic Critical Shear Buckling Force, Vcr
G3 Shear Strength of C-Section Webs With Holes
353 G4 Transverse Web Stiffeners
G4.1 Conforming Transverse Web Stiffeners
G4.2 Nonconforming Transverse Web Stiffeners
G5 Web Crippling Strength of Webs Without Holes
360 G6 Web Crippling Strength of C-Section Webs With Holes
361 H. MEMBERS UNDER COMBINED FORCES
H1 Combined Axial Load and Bending
H1.1 Combined Tensile Axial Load and Bending
H1.2 Combined Compressive Axial Load and Bending
363 H2 Combined Bending and Shear
365 H3 Combined Bending and Web Crippling
366 H4 Combined Bending and Torsional Loading
368 I. ASSEMBLIES AND SYSTEMS
I1 Built-Up Sections
I1.1 Flexural Members Composed of Two Back-to-Back C-Sections
369 I1.2 Compression Members Composed of Two Sections in Contact
370 I1.3 Spacing of Connections in Cover-Plated Sections
371 I2 Floor, Roof, or Wall Steel Diaphragm Construction
372 I3 Mixed Systems
I4 Cold-Formed Steel Light-Frame Construction
373 I4.1 All-Steel Design of Wall Stud Assemblies
374 I5 Special Bolted Moment Frame Systems
I6 Metal Roof and Wall Systems
I6.1 Member Strength: General Cross-Sections and System Connectivity
375 I6.2 Member Strength: Specific Cross-Sections and System Connectivity
I6.2.1 Flexural Members Having One Flange Through-Fastened to Deck or Sheathing
376 I6.2.2 Flexural Members Having One Flange Fastened to a Standing Seam Roof System
I6.2.3 Compression Members Having One Flange Through-Fastened to Deck or Sheathing
377 I6.2.4 Z-Section Compression Members Having One Flange Fastened to a Standing Seam Roof
I6.3 Standing Seam Roof Panel Systems
I6.3.1 Strength [Resistance] of Standing Seam Roof Panel Systems
378 I6.4 Roof System Bracing and Anchorage
I6.4.1 Anchorage of Bracing for Purlin Roof Systems Under Gravity Load With Top Flange Connected to Metal Sheathing
380 I6.4.2 Alternative Lateral and Stability Bracing for Purlin Roof Systems
I7 Rack Systems
382 J. CONNECTIONS AND JOINTS
J1 General Provisions
J2 Welded Connections
383 J2.1 Groove Welds in Butt Joints
J2.2 Arc Spot Welds
384 J2.2.1 Minimum Edge and End Distance
J2.2.2 Shear
J2.2.2.1 Shear Strength for Sheet(s) Welded to a Thicker Supporting Member
385 J2.2.2.2 Shear Strength for Sheet-to-Sheet Connections
J2.2.3 Tension
386 J2.2.4 Combined Shear and Tension on an Arc Spot Weld
J2.3 Arc Seam Welds
J2.3.2 Shear
J2.3.2.1 Shear Strength for Sheet(s) Welded to a Thicker Supporting Member
387 J2.3.2.2 Shear Strength for Sheet-to-Sheet Connections
J2.4 Top Arc Seam Sidelap Welds
J2.4.1 Shear Strength of Top Arc Seam Sidelap Welds
388 J2.5 Fillet Welds
389 J2.6 Flare Groove Welds
390 J2.7 Resistance Welds
J3 Bolted Connections
392 J3.3 Bearing
J3.3.1 Bearing Strength Without Consideration of Bolt Hole Deformation
393 J3.3.2 Bearing Strength With Consideration of Bolt Hole Deformation
J3.4 Shear and Tension in Bolts
J4 Screw Connections
394 J4.1 Minimum Spacing
J4.2 Minimum Edge and End Distances
395 J4.3 Shear
J4.3.1 Shear Strength [Resistance] Limited by Tilting and Bearing
J4.3.2 Shear in Screws
396 J4.4 Tension
J4.4.1 Pull-Out Strength
J4.4.2 Pull-Over Strength
397 J4.4.3 Tension in Screws
J4.5 Combined Shear and Tension
J4.5.1 Combined Shear and Pull-Over
398 J4.5.2 Combined Shear and Pull-Out
J4.5.3 Combined Shear and Tension in Screws
J5 Power-Actuated Fastener (PAF) Connections
J5.1 Minimum Spacing, Edge and End Distances
399 J5.2 Power-Actuated Fasteners (PAFs) in Tension
J5.2.1 Tension Strength of Power-Actuated Fasteners (PAFs)
J5.2.2 Pull-Out Strength
400 J5.2.3 Pull-Over Strength
J5.3 Power-Actuated Fasteners (PAFs) in Shear
J5.3.1 Shear Strength of Power-Actuated Fasteners (PAFs)
401 J5.3.2 Bearing and Tilting Strength
J5.3.3 Pull-Out Strength in Shear
J5.3.4 Net Section Rupture Strength
J5.3.5 Shear Strength Limited by Edge Distance
J5.4 Combined Shear and Tension
402 J6 Rupture
407 J7 Connections to Other Materials
J7.1 Connection Strength to Other Materials
408 J7.1.1 Bearing
409 J7.1.2 Tension
J7.1.3 Shear
410 K. RATIONAL ENGINEERING ANALYSIS AND TESTING
K1 Test Standards
K2 Tests for Special Cases
K2.1 Tests for Determining Structural Performance
K2.1.1 Load and Resistance Factor Design and Limit States Design
413 K2.1.2 Allowable Strength Design
K2.2 Tests for Confirming Structural Performance
K2.3 Tests for Determining Mechanical Properties
K2.3.1 Full Section
414 K2.3.2 Flat Elements of Formed Sections
K2.3.3 Virgin Steel
415 L. DESIGN FOR SERVICEABILITY (Ieff)
L1 Serviceability Determination for Effective Width Method
L2 Serviceability Determination for Direct Strength Method
L3 Flange Curling
416 M. DESIGN FOR FATIGUE
418 APPENDIX 1, EFFECTIVE WIDTH OF ELEMENTS
422 1.1 Effective Width of Uniformly Compressed Stiffened Elements
424 1.1.1 Uniformly Compressed Stiffened Elements With Circular or Noncircular Holes
1.1.2 Webs and Other Stiffened Elements Under Stress Gradient
425 1.1.3 C-Section Webs With Holes Under Stress Gradient
426 1.1.4 Uniformly Compressed Elements Restrained by Intermittent Connections
428 1.2 Effective Widths of Unstiffened Elements
430 1.2.1 Uniformly Compressed Unstiffened Elements
1.2.2 Unstiffened Elements and Edge Stiffeners With Stress Gradient
432 1.3 Effective Width of Uniformly Compressed Elements With a Simple Lip Edge Stiffener
433 1.4 Effective Widths of Stiffened Elements With Single or Multiple Intermediate Stiffeners or Edge-Stiffened Elements With Intermediate Stiffener(s)
1.4.1 Effective Width of Uniformly Compressed Stiffened Elements With Single or Multiple Intermediate Stiffeners
435 1.4.2 Edge-Stiffened Elements With Intermediate Stiffener(s)
436 APPENDIX 2, ELASTIC BUCKLING ANALYSIS OF MEMBERS
2.1 General Provisions
2.2 Numerical Solutions
2.2.1 Elastic Buckling of Cold-Formed Steel Members
438 2.2.2 Summary of Available Numerical Solution Methods
444 2.2.3 Numerical Solutions – Identifying Buckling Modes
446 2.2.4 Numerical Solutions – End Boundary Conditions
447 2.2.5 Numerical Solutions – Shear Buckling
448 2.2.6 Numerical Solutions – Members With Holes
451 2.2.7 Numerical Solutions – Bracing and Attachments
452 2.2.8 Numerical Solutions – Moment Gradient or Stress Gradient
2.2.9 Numerical Solutions—Members With Variation Along Length
2.2.10 Numerical Solutions – Built-Up Sections and Assemblages
453 2.3 Analytical Solutions
2.3.1 Members Subject to Compression
2.3.1.1 Global Buckling (Fcre, Pcre)
455 2.3.1.2 Local Buckling (Fcr, Pcr)
2.3.1.3 Distortional Buckling (Fcrd, Pcrd)
457 2.3.2 Members With Holes Subject to Compression
2.3.2.1 Global Buckling (Fcre, Pcre) for Members With Holes
2.3.2.1.1 Sections With Holes Not Subject to Torsional or Flexural-Torsional Buckling
458 2.3.2.1.2 Doubly- or Singly-Symmetric Sections (With Holes) Subject to Torsional or Flexural-Torsional Buckling
459 2.3.2.1.3 Point Symmetric Sections With Holes
2.3.2.1.4 Non-Symmetric Sections With Holes
2.3.2.2 Local Buckling (Fcr, Pcr) for Members With Holes
2.3.2.3 Distortional Buckling (Fcrd, Pcrd) for Members With Holes
460 2.3.3 Members Subject to Flexure
2.3.3.1 Global Buckling (Fcre, Mcre)
2.3.3.2 Local Buckling (Fcr, Mcr)
2.3.3.3 Distortional Buckling (Fcrd, Mcrd)
463 2.3.4 Members With Holes Subject to Flexure
2.3.4.1 Global Buckling (Fcre, Mcre) for Members With Holes
2.3.4.2 Local Buckling (Fcr, Mcr) for Members With Holes
2.3.4.3 Distortional Buckling (Fcrd, Mcrd) for Members With Holes
2.3.5 Shear Buckling (Vcr)
466 APPENDIX A, COMMENTARY ON PROVISIONS APPLICABLE TO THE UNITED STATES AND MEXICO
I6.2.2 Flexural Members Having One Flange Fastened to a Standing Seam Roof System
I6.2.4 Z-Section Compression Members Having One Flange Fastened to a Standing Seam Roof
467 I6.3.1a Strength of Standing Seam Roof Panel Systems
468 J3.4 Shear and Tension in Bolts
472 APPENDIX B, COMMENTARY ON PROVISIONS APPLICABLE TO CANADA
C2a Lateral and Stability Bracing
C2.1a Symmetrical Beams and Columns
C2.1.1 Discrete Bracing for Beams
C2.2a C-Section and Z-Section Beams
C2.2.2 Discrete Bracing
473 C2.2.3 One Flange Braced by Deck, Slab, or Sheathing
474 REFERENCES
AISI S100 2016 RA 2020 wS2
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