Standards

ASC O5 Standards and Other Publications

Note:  These ASC O5 Standards and Technical Reports may be purchased as downloadable PDF files from the following sources:

Alternately, you may click on the document designations below to purchase these documents from the ANSI eStandards Store:

Current O5 Standards:

ANSI O5.1-2017
(Approved by ANSI - February 2017)
Wood Poles:  Specifications and Dimensions
ANSI O5.2-2020
(Approved by ANSI - January 2020)
Wood Poles - Structural Glued Laminated Timber for Utility Structures
ANSI O5.3-2021
(Approved by ANSI - February 2021)
Solid-Sawn Wood Crossarms, Braces, and Ground Wire
Moulding: Specifications and Dimensions

Withdrawn O5 Standards:

ANSI O5.4-2017
(Withdrawn December 2021)
Naturally Durable Hardwood Poles – Specifications and Dimensions (Withdrawn, but the historic version is still available)
ANSI O5.5-2010 (r2016)
(Withdrawn December 2021)
Wood Ground Wire Moulding - Specifications & Dimensions (Withdrawn, but the historic version is still available.  Note that current ground wire moulding specifications can be found in ANSI O5.3, above)
ANSI O5.6-2010
(Withdrawn June 2019)
Solid-Sawn Naturally Durable Hardwood Crossarms and Braces: Specifications and Dimensions (Withdrawn, but the historic version is still available)

The ASC O5 Operating Procedures are available for free download by clicking this link.

In the development of the O5 Standards, a database of wood pole test data was used.  It was last updated on 30 May 2002 and includes data from EPRI 1,2,3,4,5,6

1 (Copyright © (1985). Electric Power Research Institute. EL-4109-V1. Wood Pole Properties, Volume 1: Background and Southern Pine Data. Reprinted with Permission.
2 (Copyright © (1986). Electric Power Research Institute. EL-4109-V2. Wood Pole Properties, Volume 2: Douglas Fir Data. Reprinted with Permission.
3 (Copyright © (1986). Electric Power Research Institute. EL-4109-V3. Wood Pole Properties, Volume 3: Western Red Cedar Data and Size Effect. Reprinted with Permission.
4 (Copyright © (1981). Electric Power Research Institute. EL-2040-V1. Probability-Based Design of Wood Transmission Structures. Reprinted with Permission.
5 (Copyright © (1981). Electric Power Research Institute. EL-2040-V2. Probability-Based Design of Wood Transmission Structures. Reprinted with Permission.
6 (Copyright © (1981). Electric Power Research Institute. EL-2040-V3. Probability-Based Design of Wood Transmission Structures. Reprinted with Permission.