A.Craig Firl, technical manager for fall-protection equipment manufacturer Capital Safety, responds: The short answer is no, they're not. Unless the harness is compliant with OSHA and ANSI - and labeled accordingly - it should not be used on the job site.
There are a number of important design differences between a mountain-climbing harness - sometimes called a sit harness - and an industrial-type fall-arrest harness. Full-body harnesses for job-site use feature shoulder straps, leg straps, sub-pelvic support (which absorbs impact to the buttocks area), and a chest strap to restrain the worker.
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