Back to Federal guidance

No. 9 wire as support for reinforcing-steel structures

Summary A worker representative asked whether No. 9 wire can support reinforcing-steel walls, piers, and columns. OSHA said the cited construction standard requires adequate support and that, without tensile-strength factors for this use, No. 9 wire does not meet the requirement. The guidance matters to contractors erecting vertical reinforcing-steel structures.
Document
Federal opinion letter
Agency
Occupational Safety and Health Administration (OSHA)
Document number
1989-04-11
Date issued
April 11, 1989
Status
Active
Status last verified October 10, 2026

Apply this to your situation

This page explains the general guidance. Ask about your specific situation and see what current federal labor law says, with citations.

About this page: The full text below is the official document from Occupational Safety and Health Administration (OSHA). Ezel adds the plain-English summary and tracks the document's status. The official source linked on this page is authoritative for any reliance.

April 11, 1989

Steve D. Cooper
General Organizer
[Recipient address omitted]
Dear Mr. Cooper:

This is in response to your correspondence concerning the use of No. 9 wire as a guide wire or support for reinforcing steel walls, piers, and columns.

The standard, CFR 1926.703(d) requires that vertical structures be adequately supported. Since there are no tensile strength factors identified for No. 9 wire use, it cannot be considered as adequate and therefore, does not meet the requirements of this standard.

Presently, a field directive is not considered necessary because compliance officers do recognize that No. 9 wire is not adequate to support large walls, columns or piers.

I appreciate your concern regarding the possible misapplication in the use of No. 9 wire and your continued support for employee safety and health standards.

If I can be of further assistance, please feel free to call me at 532-8136.

Sincerely,
Gerald P. Reidy, Director
Office of Construction and
Maritime Compliance Assistance

What does federal law require in your situation?

Ezel checks current federal labor law against your facts and answers with citations.

Opens in Ezel Pro.

  • Checks the law as it stands today, not only this page
  • Cites every source it relies on, so you can verify it
  • Chat, drafting and research in one workspace