Archive Notice - OSHA Archive

NOTICE: This is an OSHA Archive Document, and may no longer represent OSHA Policy. It is presented here as historical content, for research and review purposes only.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at

October 28, 1987

                    Regional Administrator

THRU:               LEO CAREY, Director
                    Office of Field Programs

FROM:               THOMAS J. SHEPICH, Director
                    Directorate of Compliance Programs

SUBJECT:            STD 1-11.2B Work Platforms suspended from
                    Lattice or Hydraulic Crane Booms

The adoption of National Consensus Standards by OSHA, as authorized under the Occupational Safety and Health Act of 1970, resulted in many "gray areas" which have required official clarifications and interpretations. This is now accomplished by the use of OSHA instructions. Prior to the formulation of an OSHA instruction, extensive research is done in the developing process. The Offices of Standards Development, Compliance and the Solicitor must concur prior to finalization of these instructions. This office interprets 29 CFR 1926.550(b)(2) to allow the use of suspended working platforms. Section 5-3.2.3e of ANSI B30.5-1968 states that "The operator shall not hoist, lower, swing or travel while anyone is one the load, or hook." However, we and ANSI have interpreted the above requirement as not prohibiting the use of crane suspended working platforms under the conditions required in STD 1-11.2B. At this time we are not aware of any enforcement problems with the subject instruction which clarifies 29 CFR 1926.550(b)(2).