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ANSI technical provisions for single-point scaffolds

Summary An attorney asked whether a referenced ANSI powered platform standard could apply to temporary construction scaffolds despite the ANSI document's stated scope. OSHA said its construction rule incorporated the applicable technical portions to supplement the single-point scaffold requirements, and those portions were enforced on construction projects. OSHA archives the letter.
Document
Federal opinion letter
Agency
Occupational Safety and Health Administration (OSHA)
Document number
1980-01-22
Date issued
January 22, 1980
Status
Archived by the agency
OSHA labels this an archive document and warns that it may no longer represent OSHA policy.
Status last verified October 10, 2026

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NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

January 22, 1980
Mr. Paul D. Lawent
Attorney at Law
[Recipient address omitted]
Dear Mr. Lawent:
This is in response to your inquiry concerning the reference in 29 CFR 1926.451(k)(10) to the technical portions of American National Standards Institute, (ANSI) A120.1-1970.
The scope paragraph of ANSI A120.1-1970 does state that the rules of the standard do not apply to temporary equipment used for construction work, or to devices which are raised and lowered manually. However, the purpose paragraph establishes that the standard is intended for use by designers, fabricators, inspectors, purchasers, and users of powered platforms and is intended as a guide for enforcement agencies in the formulation of safety rules, regulations and requirements.
29 CFR 1926.451(k), for single-point adjustable suspension scaffolds which may include power units, has nine other requirements. 29 CFR 1926.451(k)(10) references the applicable technical portions of ANSI A120.1 1970, Power Operated Devices for Exterior Building Maintenance Powered Platforms, to provide additional details not covered by the existing standards. The ANSI A120.1-1970 contains much more technical information than 29 CFR 1926.451(k) and the applicable technical portions are enforced at construction projects.
The scaffold standards were promulgated as part of the safety and health regulations for construction which were subject to public hearings then adopted by OSHA under section 6(a) of the Act.
If I may be of any further assistance, please feel free to call or write.
Sincerely,
Grover C. Wrenn Director,
Federal Compliance and State Programs

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