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manual chain hoist load rating
2

manual chain hoist load rating

manual chain hoist load rating

(OP)
we need to rate some small manual chain hoist ,these are used to lift material and various small parts, what is the FS required by OSHA.

RE: manual chain hoist load rating

If I recall, OSHA publishes this on the website. In general, I recall for rigging it was 4 or 5 FS on wire rope, hooks, blocks, etc.  

RE: manual chain hoist load rating

I take it you're in the States somewhere.  In Alberta, Canada, there isn't a required safety factor or standard for lifting devices with a capacity of less than 2000 kg- it simply must be certified by a professional engineer. Check your OSHA Legislation though.

For reference, rigging safety factors (rope, slings, shackles, etc...) are 4-5, below the hook devices (spreader beams, etc...) SFs are a minimum of 3 (see ASME B30.20 & BTH-1) while cranes can be as low as 1.5-2.5.  I would aim towards 3-4 as chain hoists are typically neglected as far as maintenance and inspection.

RE: manual chain hoist load rating

If people can stand underneath the load, or it is man rated, then higher SFs apply, where I work we design to 4 and test to 2 annually, for general workshop hoists and jibs.

Cheers

Greg Locock

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RE: manual chain hoist load rating

Check w/ the mfg.  Ropes, slings, etc are 5:1

RE: manual chain hoist load rating

Every piece of rigging/literature from a manufacturer states that persons should not be under the load.  Nobody wants this liability...  

I doubt you're lifting people with a manual chain hoist but the required safety factor here for manlifts is 10:1.

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