ASCE Standard 10 2015

$54.17

ASCE Standard 10 – Design of Latticed Steel Transmission Structures

Published By	Publication Date	Number of Pages
ASCE	2015	90

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Category: ASCE

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Description

“Prepared by the Design of Steel Transmission Towers Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCE This standard provides requirements for the design, fabrication, and testing of members and connections for latticed steel electrical transmission structures. Covering guyed and self-supporting structures, these requirements are applicable to hot-rolled and cold-formed steel shapes. The standard specifies the design criteria for structure components—members, connections, and guys—to resist design-factored loads at stresses approaching yielding, buckling, or fracture. This new edition, which replaces the previous Standard ASCE 10-97, presents minor changes to the design requirements and introduces new sections on redundant members, welded angles, anchor bolts with base plates on leveling nuts, and post angle member splices. Topics include: loading, geometry, and analysis; design of members, including compression members, tension members, and beams; design of connections, including fasteners, minimum distances, and attachment holes; detailing and fabrication; full-scale structure testing; structural members and connections used in foundations; and quality assurance and quality control. A detailed commentary contains explanatory and supplementary information to assist users of the standard. In addition, one appendix offers 17 design examples, and a new appendix offers guidance for evaluating older (legacy) electrical transmission towers. Standard ASCE/SEI 10-15 “Prepared by the Design of Steel Transmission Towers Standards Committee of the Codes and Standards Activities Division of the Structural Engineering Institute of ASCE This standard provides requirements for the design, fabrication, and testing of members and connections for latticed steel electrical transmission structures. Covering guyed and self-supporting structures, these requirements are applicable to hot-rolled and cold-formed steel shapes. The standard specifies the design criteria for structure components—members, connections, and guys—to resist design-factored loads at stresses approaching yielding, buckling, or fracture. This new edition, which replaces the previous Standard ASCE 10-97, presents minor changes to the design requirements and introduces new sections on redundant members, welded angles, anchor bolts with base plates on leveling nuts, and post angle member splices. Topics include: loading, geometry, and analysis; design of members, including compression members, tension members, and beams; design of connections, including fasteners, minimum distances, and attachment holes; detailing and fabrication; full-scale structure testing; structural members and connections used in foundations; and quality assurance and quality control. A detailed commentary contains explanatory and supplementary information to assist users of the standard. In addition, one appendix offers 17 design examples, and a new appendix offers guidance for evaluating older (legacy) electrical transmission towers. Standard ASCE/SEI 10-15 is a primary reference for structural engineers designing latticed steel electrical transmission structures, as well as for other engineers, inspectors, and utility officials involved in the electric power transmission industry.” is a primary reference for structural engineers designing latticed steel electrical transmission structures, as well as for other engineers, inspectors, and utility officials involved in the electric power transmission industry.”

PDF Catalog

PDF Pages	PDF Title
1	Cover
6	CONTENTS
12	PREFACE
14	DESIGN OF STEEL TRANSMISSION TOWERS STANDARDS COMMITTEE
16	1.0 GENERAL 1.1 Scope 1.2 Applicable Documents 1.3 Definitions
18	2.0 LOADING, GEOMETRY, AND ANALYSIS 2.1 Introduction 2.2 Loads 2.3 Geometric Configurations 2.4 Methods of Analysis
20	3.0 DESIGN OF MEMBERS 3.1 Introduction 3.2 Material 3.3 Minimum Sizes 3.4 Slenderness Ratios 3.5 Properties of Sections 3.6 Design Compression 3.7 Compression Members: Angles 3.7.1 Maximum w/t Ratio
21	3.7.2 Design Compressive Stress 3.7.3 Determination of F[sub(a)] 3.7.4 Effective Lengths
22	3.8 Compression Members: Symmetrical Lipped Angles 3.8.1 Maximum w/t Ratio 3.8.2 Design Compressive Stress
23	3.8.3 Equivalent Radius of Gyration 3.8.4 Minimum Lip Depth 3.9 Compression Members Not Covered in Sections 3.7 and 3.8 3.9.1 Design Compressive Stress 3.9.2 Maximum w/t Ratio 3.9.3 Effective Widths of Elements in Compression
24	3.9.4 Doubly Symmetric Open Cross Sections 3.9.5 Singly Symmetric Open Cross Sections 3.9.6 Point-Symmetric Open Cross Sections 3.9.7 Closed Cross Sections 3.9.8 Nonsymmetric Cross Sections 3.9.9 Lips 3.9.10 Eccentric Connections 3.10 Tension Members 3.10.1 Design Tensile Stress 3.10.2 Angle Members
25	3.10.3 Eccentric Connections 3.10.4 Threaded Rods and Anchor Bolts 3.10.5 Guys 3.11 Stitch Bolts 3.12 Axial Compression and Bending 3.13 Axial Tension and Bending
26	3.14 Beams 3.14.1 Properties of Sections 3.14.2 Design Tension 3.14.3 Laterally Supported Beams 3.14.4 I, Channel, and Cruciform Sections 3.14.5 Other Doubly Symmetric Open Sections 3.14.6 Singly Symmetric I and T Sections 3.14.7 Other Singly Symmetric Open Sections 3.14.8 Equal Leg Angles
27	3.15 Design Shear 3.15.1 Beam Webs 3.15.2 Angles
28	3.16 Redundant Members 3.17 Welded Angles 3.17.1 Compression Members 3.17.2 Tension Members 3.18 Test Verification
30	4.0 DESIGN OF CONNECTIONS 4.1 Introduction 4.2 General Requirements 4.3 Fasteners 4.3.1 Materials 4.3.2 Bolt Shear Capacity 4.3.3 Bolt Tension Capacity 4.3.4 Bolts Subject to Combined Shear and Tension 4.4 Design Bearing Stress 4.5 Minimum Distances 4.5.1 End Distance
31	4.5.2 Center-to-Center Bolt Hole Spacing 4.5.3 Edge Distance 4.6 Attachment Holes 4.7 Post Angle Member Splices 4.8 Test Verification
32	5.0 DETAILING AND FABRICATION 5.1 Detailing 5.1.1 Drawings 5.1.2 Approval of Shop Drawings 5.1.3 Connections 5.1.4 Bolt Spacing 5.1.5 Detail Failures During Testing 5.1.6 Material 5.1.7 Weathering Steel 5.1.8 Tension-Only Members 5.1.9 Shop Check Assembly 5.1.10 Other Considerations 5.2 Fabrication 5.2.1 Material 5.2.2 Specifications 5.2.3 Shop Operations
33	5.2.4 Piece Marks 5.2.5 Welding 5.2.6 Galvanizing 5.2.7 Shipping
34	6.0 TESTING 6.1 Introduction 6.2 Foundations 6.3 Material 6.4 Fabrication 6.5 Strain Measurements 6.6 Assembly and Erection 6.7 Test Loads 6.8 Load Application 6.9 Loading Procedure 6.10 Load Measurement 6.11 Deflections
35	6.12 Failures 6.13 Disposition of Prototype 6.14 Report
36	7.0 STRUCTURAL MEMBERS AND CONNECTIONS USED IN FOUNDATIONS 7.1 Introduction 7.2 General Considerations 7.2.1 Steel Grillages 7.2.2 Pressed Plates 7.2.3 Stub Angles in Concrete Piers 7.2.4 Anchor Bolts [See Fig. 7-1(e)] 7.3 Deterioration Considerations 7.4 Design of Stub Angles and Anchor Bolts 7.4.1 Stub Angles in Concrete 7.4.2 Anchor Bolts with Base Assembly in Contact with Concrete or Grout
37	7.4.3 Anchor Bolts with Base Plates on Leveling Nuts 7.5 Design Requirements for Concrete and Reinforcing Steel 7.5.1 Stub Angles
38	7.5.2 Smooth Bar Anchor Bolts 7.5.3 Deformed Bar Anchor Bolts 7.6 Shear Connectors 7.6.1 Stud Shear Connectors 7.6.2 Angle Shear Connectors
39	7.7 Test Verification
40	8.0 QUALITY ASSURANCE AND QUALITY CONTROL 8.1 Introduction 8.2 Quality Assurance 8.3 Quality Control
42	COMMENTARY
44	C2.0 LOADING, GEOMETRY, AND ANALYSIS C2.1 Introduction C2.2 Loads C2.3 Geometric Configurations C2.4 Methods of Analysis
50	C3.0 DESIGN OF MEMBERS C3.1 Introduction C3.2 Material C3.3 Minimum Sizes C3.4 Slenderness Ratios C3.5 Properties of Sections C3.6 Design Compression C3.7 Compression Members: Angles
51	C3.7.3 Determination of F[sub(a)] C3.7.4 Effective Lengths
53	C3.8 Compression Members: Symmetrical Lipped Angles C3.9 Compression Members Not Covered in Sections 3.7 and 3.8 C3.9.2 Maximum w/t Ratio C3.9.3 Effective Widths of Elements in Compression C3.9.8 Nonsymmetric Cross Sections C3.10 Tension Members C3.10.5 Guys
54	C3.12 Axial Compression and Bending C3.13 Axial Tension and Bending C3.14 Beams C3.14.4 I, Channel, and Cruciform Sections C3.14.6 Singly Symmetric I and T Sections C3.14.7 Other Singly Symmetric Open Sections C3.14.8 Equal Leg Angles C3.15 Design Shear C3.15.1 Beam Webs
55	C3.16 Redundant Members C3.17 Welded Angles
56	C4.0 DESIGN OF CONNECTIONS C4.1 Introduction C4.3 Fasteners C4.3.2 Bolt Shear Capacity C4.3.3 Bolt Tension Capacity C4.3.4 Bolts Subject to Combined Shear and Tension C4.4 Design Bearing Stress C4.5 Minimum Distances C4.5.1 End Distance
57	C4.5.2 Center-to-Center Bolt Hole Spacing
58	C4.5.3 Edge Distance C4.6 Attachment Holes
59	C4.7 Post Angle Member Splices
60	C5.0 DETAILING AND FABRICATION C5.2 Fabrication C5.2.5 Welding
62	C6.0 TESTING C6.1 Introduction C6.2 Foundations C6.2.1 General C6.2.2 Rigid Structures C6.2.3 Direct Embedded Structures C6.2.4 Components C6.3 Material C6.4 Fabrication C6.5 Strain Measurements
63	C6.6 Assembly and Erection C6.8 Load Application C6.9 Loading Procedure C6.10 Load Measurement C6.11 Deflections C6.13 Disposition of Prototype
64	C7.0 STRUCTURAL MEMBERS AND CONNECTIONS USED IN FOUNDATIONS C7.1 Introduction C7.2 General Considerations C7.2.2 Pressed Plates C7.3 Deterioration Considerations C7.5 Design Requirements for Concrete and Reinforcing Steel C7.6 Shear Connectors C7.6.1 Stud Shear Connectors C7.6.2 Angle Shear Connectors
66	C8.0 QUALITY ASSURANCE AND QUALITY CONTROL C8.1 Introduction C8.2 Quality Assurance C8.3 Quality Control
68	APPENDIX A: NOTATION
70	APPENDIX B: EXAMPLES Example 1. Equal Leg Angle with Symmetrical Bracing
71	Example 2. Effect of End Connections on Member Capacity Example 3. Concentric Loading, Two Angle Member
72	Example 4. K-Bracing, Two Angle Member
73	Example 5. Effect of Subdivided Panels and End Connections Example 6. Concentric Loading, Two Angle Member, Subdivided Panels
74	Example 7. X-Brace Systems with No Intermediate Redundant Supports
75	Example 8. X-Brace Systems with Intermediate Redundant Supports—Case 1 Example 9. X-Brace Systems with Intermediate Redundant Supports—Case 2
76	Example 10. Cold-Formed Angle
77	Example 11. Cold-Formed Lipped Angle
78	Example 12. M-Section as Column Member Example 13. Channel as Column
79	Example 14. T-Section as Column Example 15. Schifflerized Angle with Symmetrical Bracing
80	Example 16. Schifflerized Angle with Unsymmetrical Bracing
81	Example 17. j-Value Determination
82	APPENDIX C: GUIDELINES FOR EXISTING TOWERS C.1 Introduction C.2 Slenderness Ratios C.3 Minimum Distances C.4 Bolt Shear Capacity C.5 Bearing Capacity of Bolts and Members
83	C.6 Tested Towers C.7 Member Use Ratios C.8 Man-Load on Horizontal Members C.9 Minimum Support of Redundant Members C.10 Bars Used as Tension Hangers in Cross Arms C.11 ASTM Material Specifications Used in Older Towers
84	C.12 Original Compression Formulas Used in Older Tower Designs
86	REFERENCES
88	INDEX A B C D
89	E F G H J K L M N P Q R S
90	T U W X