ASCE 48 2011

$46.04

ASCE/SEI 48 Design of Steel Transmission Pole Structures

Published By	Publication Date	Number of Pages
ASCE	2011	102

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Description

This Standard provides a uniform basis for the design, detailing, fabrication, testing, assembly, and erection of steel tubular structures for electrical transmission poles. These guidelines apply to cold-formed single- and multipole tubular steel structures that support overhead transmission lines. The design parameters are applicable to guyed and self-supporting structures using a variety of foundations, including concrete caissons, steel piling, and direct embedment. Standard ASCE/SEI 48-11 replaces the previous edition (ASCE/SEI 48-05) and revises some formulas that are based on other current industry standards. This Standard includes a detailed commentary and appendixes with explanatory and supplementary information.

This Standard will be a primary reference for structural engineers and construction managers involved in designing and building electrical transmission lines, as well as engineers and others involved in the electric power transmission industry.

PDF Catalog

PDF Pages	PDF Title
1	Cover
12	Contents
18	1 Scope
20	2 Applicable Documents
22	3 Definitions
24	4 Loading, Geometry, and Analysis 4.1 Introduction 4.2 Loading 4.2.1 Factored Design Loads 4.2.2 Loading Considerations 4.2.3 Load Expression 4.3 Geometric Configurations 4.3.1 Configuration Considerations 4.3.2 Structure Types 4.4 Methods of Analysis 4.4.1 Structural Analysis Methods 4.4.2 Analysis of Connections 4.5 Additional Considerations 4.5.1 Structural Support 4.5.2 Design Restrictions 4.5.3 Climbing and Maintenance Provisions 4.5.4 Pre-engineered Steel Poles (“Wood Pole Equivalents”)
26	5 Design of Members 5.1 Introduction 5.2 Members 5.2.1 Materials 5.2.2 Tension 5.2.3 Compression
27	5.2.4 Shear
28	5.2.5 Bending 5.2.6 Combined Stresses 5.3 Guys 5.3.1 Material Properties 5.3.2 Tension 5.4 Test Verification
30	6 Design of Connections 6.1 Introduction 6.2 Bolted and Pinned Connections 6.2.1 Materials 6.2.2 Shear Stress in Bearing Connections 6.2.3 Bolts Subject to Tension 6.2.4 Bolts Subject to Combined Shear and Tension 6.2.5 Bearing Stress in Bolted Connections
31	6.2.6 Minimum Edge Distances and Bolt Spacing for Bolted Connections 6.2.7 Bearing Stress in Pinned Connections 6.2.8 Minimum Edge Distances for Pinned Connections 6.2.9 Connection Elements and Members 6.3 Welded Connections 6.3.1 Material Properties 6.3.2 Effective Area
32	6.3.3 Design Stresses 6.3.4 Circumferential Welded Splices 6.3.5 Flange and Base Plate to Pole Shaft Welds 6.3.6 T-Joints 6.4 Field Connections of Members 6.4.1 Slip Joints
33	6.4.2 Base and Flange Plate Connections 6.5 Test Verification
34	7 Detailing and Fabrication 7.1 Detailing 7.1.1 Drawings 7.1.2 Drawing Review 7.1.3 Erection Drawings 7.1.4 Shop Detail Drawings 7.2 Fabrication 7.2.1 Material 7.2.2 Material Preparation 7.2.3 Welding
36	8 Testing 8.1 Introduction 8.2 Foundations 8.3 Material 8.4 Fabrication 8.5 Strain Measurements 8.6 Assembly and Erection 8.7 Test Loads 8.8 Load Application 8.9 Loading Procedure 8.10 Load Measurement 8.11 Deflections 8.12 Failures 8.13 Post-Test Inspection 8.14 Disposition of Prototype 8.15 Report
38	9 Structural Members and Connections Used in Foundations 9.1 Introduction 9.2 General Considerations 9.3 Anchor Bolts 9.3.1 Bolts Subject to Tension 9.3.2 Shear Stress 9.3.3 Combined Shear and Tension 9.3.4 Development Length 9.4 Direct-Embedded Poles
39	9.5 Embedded Casings 9.6 Test Verification
40	10 Quality Assurance/Quality Control 10.1 Introduction 10.2 Quality Assurance 10.2.1 Design and Drawings 10.2.2 Materials 10.2.3 Welding 10.2.4 Nondestructive Testing 10.2.5 Tolerances 10.2.6 Surface Coatings 10.2.7 Shipping 10.3 Quality Control 10.3.1 Materials 10.3.2 Visual Inspection 10.3.3 Dimensional Inspection 10.3.4 Surface Coating Inspection 10.3.5 Weld Inspection
41	10.3.6 Shipment and Storage
42	11 Assembly and Erection 11.1 Introduction 11.2 Handling 11.3 Single-Pole Structures 11.3.1 Slip Joints 11.3.2 Bolted Flange Joints 11.3.3 Attachments to Pole Sections 11.3.4 Erection of Assembled Structures 11.4 Frame-Type Structures 11.4.1 Slip Joints in Frames 11.4.2 Erection 11.4.3 Bolted Frame Connections 11.5 Installation on Foundation 11.5.1 Anchor Bolt and Base Plate Installation 11.5.2 Direct-Embedded Poles 11.6 Guying 11.6.1 Guy Anchor Location 11.6.2 Guy Installation 11.7 Posterection Procedures 11.7.1 Inspection 11.7.2 Grounding 11.7.3 Coating Repair
43	11.7.4 Unloaded Arms 11.7.5 Hardware Installation
44	COMMENTARY
46	C4 Loading, Geometry, and Analysis C4.2 Loading C4.2.1 Factored Design Loads C4.2.2 Loading Considerations C4.2.3 Load Expression
47	C4.3 Geometric Configurations C4.3.1 Configuration Considerations C4.3.2 Structure Types C4.4 Methods of Analysis C4.4.1 Structural Analysis Methods
48	C4.5 Additional Considerations C4.5.1 Structural Support C4.5.2 Design Restrictions C4.5.3 Climbing and Maintenance Provisions C4.5.4 Pre-engineered Steel Poles (“Wood Pole Equivalents”)
50	C5 Design of Members C5.1 Introduction C5.2 Members C5.2.1 Materials C5.2.2 Tension C5.2.3 Compression
53	C5.2.4 Shear C5.2.5 Bending C5.2.6 Combined Stresses C5.3 Guys C5.3.1 Material Properties C5.3.2 Tension References
56	C6 Design of Connections C6.1 Introduction C6.2 Bolted and Pinned Connections C6.2.1 Materials C6.2.2 Shear Stress in Bearing Connections C6.2.3 Bolts Subject to Tension C6.2.5 Bearing Stress in Bolted Connections C6.2.6 Minimum Edge Distances and Bolt Spacing for Bolted Connections C6.2.7 Bearing Stress in Pinned Connections
57	C6.2.8 Minimum Edge Distances for Pinned Connections C6.2.9 Connection Elements and Members C6.3 Welded Connections C6.3.3 Design Stresses C6.4 Field Connections of Members C6.4.1 Slip Joints
58	C6.4.2 Base and Flange Plate Connections C6.5 Test Verification
60	C7 Detailing and Fabrication C7.1 Detailing C7.1.1 Drawings C7.1.2 Drawing Review C7.1.3 Erection Drawings C7.1.4 Shop Detail Drawings C7.2 Fabrication C7.2.1 Material C7.2.2 Material Preparation
61	C7.2.3 Welding
62	C8 Testing C8.1 Introduction C8.2 Foundations C8.3 Material C8.4 Fabrication C8.5 Strain Measurements C8.6 Assembly and Erection
63	C8.7 Test Loads C8.8 Load Application C8.9 Loading Procedure C8.10 Load Measurement C8.11 Defiections C8.12 Failures C8.13 Post-Test Inspection C8.14 Disposition of Prototype C8.15 Report
64	C9 Structural Members and Connections Used in Foundations C9.1 Introduction C9.2 General Considerations
65	C9.3 Anchor Bolts C9.3.3 Combined Shear and Tension C9.3.4 Development Length
66	C9.4 Direct-Embedded Poles C9.5 Embedded Casings
68	C10 Quality Assurance/Quality Control C10.1 Introduction C10.2 Quality Assurance C10.2.1 Design and Drawings C10.2.4 Nondestructive Testing C10.2.5 Tolerances C10.2.6 Surface Coatings C10.2.7 Shipping C10.3 Quality Control C10.3.1 Materials C10.3.3 Dimensional Inspection C10.3.4 Surface Coating Inspection C10.3.5 Weld Inspection
69	C10.3.6 Shipment and Storage
70	C11 Assembly and Erection C11.1 Introduction C11.2 Handling C11.3 Single-Pole Structures C11.3.1 Slip Joints C11.3.2 Bolted Flange Joints
71	C11.3.3 Attachments to Pole Sections C11.3.4 Erection of Assembled Structures C11.4 Frame-Type Structures C11.4.1 Slip Joints in Frames C11.4.2 Erection C11.5 Installation on Foundation C11.5.1 Anchor Bolt and Base Plate Installation C11.5.2 Direct-Embedded Poles C11.6 Guying C11.6.1 Guy Anchor Location C11.6.2 Guy Installation
72	C11.7 Posterection Procedures C11.7.1 Inspection C11.7.2 Grounding C11.7.3 Coating Repair C11.7.4 Unloaded Arms C11.7.5 Hardware Installation
74	Appendix I: Notations
76	Appendix II: Properties of Various Tubular Sections Notation for Appendix II
80	Appendix III: Horizontal Testing Test Equipment Test Procedure for Pole Test
82	Appendix IV: Headed Anchor Bolts Development Length Background
84	Appendix V: Assembly and Erection Introduction Helicopter Erection In-Service Structure Maintenance and Inspection Wind-Induced Vibration
86	Appendix VI: Shaft-to-Foundation Connection Base Plates—Analysis Considerations
88	Calculation of Anchor Bolt Load
90	Appendix VII: Corrosion Protection and Finish Considerations Introduction Corrosion Mechanisms Corrosion Protection and Finish Options Paint and Coating Systems
91	Above-Grade Protection Below-Grade Protection Surface Preparation Application Inspection Paint or Coating Over Galvanizing Galvanizing Protection Provided
92	Appearance Special Design Considerations
93	Application Repair
94	Weathering Steel
95	Metalizing References
98	Appendix VIII: Arm-to-Shaft Connection Analysis Considerations General Load, Dimension, and Material Specifications
100	Index A B C D E F
101	G H I L M N O P Q R S
102	T U V W Z