Standard Interpretations - (Archived) Table of Contents|
| Standard Number:||1946.451 ; 1926.50; 1926.105|
|MEMORANDUM FOR:||HARVEY E. HARRIS, Director|
Office of Training and Education
Director Federal-State Operations
|FROM:||PATRICIA K. CLARK, Director|
Directorate of Compliance Programs
|SUBJECT:||Construction Interpretation Issues|
The illustration submitted in your letter that shows a "self-propelled aerial platform with articulating boom" is taken from the SIA Handbook. Mr. Vic Saleeby of the SIA has stated that the illustration is misnamed and the platform shown as item E should not be identified as an articulating boom. This office agrees. However, whatever the proper name, the key to the application of .556(b)(2)(v) is whether or not the entire boom mounted platform can be positioned outside the wheel base. If so, then body belt/harness systems are required. The system shown in your example cannot be so positioned.6. The 1986 NPRM proposed a maximum distance of 14 inches (35.6 cm) of open space be allowed before guardrails are required. There were no comments to the record that indicated this limit should be changed. Although the 1988 ANSI standard recognizes a distance of 16 inches for supported scaffolds and 12 inches for suspension scaffolds, we are not aware of the justification and do not recognize those limits.
Steep roof fall hazards are more clearly addressed in the 1986 NPRM for Subpart M--Fall Protection (51 FR 42718).8. Rest platforms for scaffold ladders are not required by the existing rules (except for mobile scaffolds), nor are they required by the 1988 ANSI standard for construction scaffolds. Whether or not there should be a rest platform requirement is an issue discussed in the 1986 NPRM.
|Standard Interpretations - (Archived) Table of Contents|
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