AISC A348 20W 2020

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AISC 348, Specification for Structural Joints Using HighStrength Bolts

Published By	Publication Date	Number of Pages
AISC	2020	118

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Description

PDF Catalog

PDF Pages	PDF Title
1	Specification for Structural Joints Using High-Strength Bolts
3	Title Page
4	Copyright RCSC 2020
5	Preface Significant Changes
8	Table of Contents
10	Symbols
12	Glossary
17	Section 1. General Requirements 1.1. Scope
18	1.2. Loads, Load Factors, and Load Combinations 1.3. Design for Strength Using Load and Resistance Factor Design (LRFD) 1.4. Design for Strength Using Allowable Strength Design (ASD)
19	1.5. Referenced Standards and Specifications
21	1.6. Structural Design Drawings and Specifications
22	Section 2. Bolting Components and Assemblies 2.1. Group Designations Table 2.1. Group Designations for Bolts and Matched Bolting Assemblies
24	2.2. Heavy Hex Structural Bolts 2.3. Heavy Hex Nuts Table 2.2. Permitted Nut Grades
25	2.4. Spline End Matched Bolting Assemblies 2.5. Washers 2.6. Washer-Type Indicating Devices Table 2.3. Permitted Materials for Direct Tension Indicators
26	2.7. Geometry of Bolting Components and Assemblies Table 2.4. Dimensional Requirements for Bolting Components and Assemblies Table 2.5. Bolt Lengths Required to Be Fully Threaded in Accordance with ASME B18.2.6
29	Table C-2.1. Heavy Hex Bolt and Nut Nominal Dimensions
30	2.8. Galvanized and Coated Bolting Components and Assemblies Table C-2.2. Bolt Length Selection
32	Table 2.6. Permitted Coatings for Bolts, Nuts and Washers
34	2.9. Test Reports 2.10. Storage and Lubrication
35	2.11. Reuse
36	2.12. Alternative-Design Bolting Components, Assemblies, and Methods
39	Section 3. Bolted Parts 3.1. Connected Plies 3.2. Faying Surfaces
43	3.3. Bolt Holes
44	Table 3.1. Nominal Bolt Hole Dimensions
47	3.4. Burrs
48	Section 4. Joint Type Table 4.1. Summary of Applications and Requirements for Bolted Joints
50	4.1. Snug-Tightened Joints
51	4.2. Pretensioned Joints 4.3. Slip-Critical Joints
53	Section 5. Limit States in Bolted Joints
54	5.1. Nominal Shear and Tensile Strengths
55	Table 5.1. Nominal Strengths per Unit Area of Bolts
57	5.2. Combined Shear and Tension
58	5.3. Nominal Bearing Strength at Bolt Holes
60	5.4. Design Slip Resistance
62	Table 5.2. Minimum Bolt Pretension, Pretensioned and Slip-Critical Joints
64	5.5. Tensile Fatigue Table 5.3. Maximum Applied TensileStress for Fatigue Loading
65	Section 6. Use of Washers 6.1. Snug-Tightened Joints Using Group 120, 144, or 150 Bolting Assemblies 6.2. Pretensioned Joints and Slip-Critical Joints Using Group 120, 144, or150 Bolting Assemblies
66	Table 6.1. Washer Requirements for Pretensioned and Slip-Critical Bolted Joints with Oversized and Slotted Holes in the Outer Ply
68	Section 7. Pre-Installation Verification 7.1. Required Testing
70	7.2. Test Procedure Table 7.1. Minimum Bolt Pretension for Pre-Installation Verification
73	Table 7.2. Minimum Initial Tension for Pre-Installation Verification of Installation in Accordance with Section 8.2.5 (Combined Method)
74	Table 7.3. Default Initial Torque Range for Pre-installation Verification of Initial Tension in Accordance with Section 8.2.5 (Combined Method)
76	Section 8. Installation 8.1. Snug-Tightened Joints
77	8.2. Pretensioned Joints and Slip-Critical Joints
79	Table 8.1. Nut Rotation from Snug-Tight Condition for Turn-of-Nut Method Pretensioning
84	Table 8.2. Nut Rotation from Initial Torque for Combined Method Pretensioning
86	Section 9. Inspection 9.1. Snug-Tightened Joints 9.2. Pretensioned Joints
90	9.3. Slip-Critical Joints
91	Section 10. Arbitration
93	Appendix A. Testing Method to Determine the Slip Coefficient for Coatings Used in Bolted Joints Section A1. General Provisions A1.1. Purpose and Scope A1.2. Definition of Essential Variables
94	A1.3. Retesting A1.4. Duration of Coating Slip Certificate
95	Section A2. Test Plates and Coating of the Specimens A2.1. Test Plates
97	A2.2. Specimen Coating
98	Section A3. Short-Term Compression Slip Tests A3.1. Compression Test Setup
99	A3.2. Instrumentation
100	A3.3. Test Procedure
101	A3.4. Slip Load A3.5. Slip Coefficient
103	A3.6. Alternative Test Methods
104	Section A4. Tension Creep Test A4.1. Test Setup
105	A4.2. Test Procedure
106	References
110	Index