Table of Contents 1
Cover
6
Preface
8
1 Introduction
1.1 Scope
1.2 Background
9
2 Pole Structures
2.1 General
2.2 Wood Pole Strength
2.3 Loads
2.4 Embedment Depth
2.5 Guying
2.6 Column Buckling
2.7 Grounding and Bonding
Notes
10
3 Pole Installation and Maintenance
3.1 Pole Placement
3.2 Guys and Anchors
3.3 Pole Maintenance
11
4 Wires, Conductors, and Cables
4.1 Categories
4.2 Messenger Wire/Strand
4.3 Electric Supply (Power) Cables
4.4 Communications Cables
4.5 Wireless Attachments
12
5 Cable Installation
5.1 Conductor and Cable Placement
5.2 Lashing Operation
5.3 Overlashing
Notes
13
6 NESC® Requirements (Strength and Loading)
6.1 National Electrical Safety Code (NESC)
6.2 Loading Requirements
6.3 Strength Requirements
6.4 Wire Tensions
6.5 Guyed Poles
6.6 Extreme Wind Loads (“60 ft Limit”)
6.7 Allowable Deterioration
6.8 Overlashed Cables
6.9 Software Tools and Pole Loading Analysis
Notes
14
7 NESC® Requirements (Clearances)
7.1 Clearances
7.2 Clearance Zones
7.3 Clearances Above Surfaces and Buildings
7.4 Clearances Between Wires
7.5 Overlashed Cables
Note
15
8 Principles of Wire Sag
8.1 Catenary
8.2 Initial and Final Sag
8.3 Sag–Tension Relationship
8.4 Determining Change in Sag (and Tension)
8.5 Ruling Span
8.6 Point Load
Note
16
9 General Order 95 (California)
9.1 General Order 95 (GO 95)
9.2 Loading Requirements
9.3 Strength Requirements
9.4 Clearances
17
10 Examples
10.1 Purpose
10.2 Tangent Line
10.3 Line Angle
10.4 Line Angle – Buckling Consideration
10.5 Additional Attachment
10.6 Summary
Note
18
Appendix A: Properties of Messenger Strands
19
Appendix B: Wireless Attachments
