safety factors for suspended scaffold ropes (steel chokers)
safety factors for suspended scaffold ropes (steel chokers)
(OP)
i am designing the cable support system for a work platform that we fabricated years ago. we have updated the platform to the DL + 4LL as required by OSHA. during my review of OSHA subpart L - scaffolds, under General Requirements (a) (3) it states " Each suspension rope, including connecting hardware, used on non-adjustable suspension scaffolds shall be capable of supporting, without failure, at least 6 times the maximine intended load applied or transmitted to that rope." i have used the industry standard F.S.=5.0 for wire slings before but i think i have to upgrade to F.S.=6.0. the main question is the connecting points top and bottom (read 'picking eyes') if i design the lugs by ASME BTH 2005, they are factored by 2 or 3 to 1. i am wondering if i can use the ultimate capacity of the lug and factor it 6:1 and be in conpliance with OSHA. for example, we have 3/8" pick lugs that are good for about 7k with N=2.0. the DL+LL =2250. X6 = 13500lbs. i am multiplying safety factors unless i can factor back from ultimate capacity of the lug
thanks in advance for anybody's thoughts.
thanks in advance for anybody's thoughts.






RE: safety factors for suspended scaffold ropes (steel chokers)
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: safety factors for suspended scaffold ropes (steel chokers)
thanks,
George
RE: safety factors for suspended scaffold ropes (steel chokers)
It's not clear to me whether the "connecting hardware" applies to the picking eyes, either. I suspect they mean the cable clips or hooks or shackles or similar items, as opposed to the load itself.