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Lifting Cables

Lifting Cables

Lifting Cables

(OP)
I have several very heavy precast beams and was curious if it is common practice to use a 1" lifting cable instead of two 1/2" lifting cables. The plant prefers the former arrangement. These are some heavy beams, but I've never seen a 1" lifting cable used before and I am concerned about developing these cables. The manufacturer has no information on development, so I am curious as to how you would ensure that the cable would be developed?  

Clansman

If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.

RE: Lifting Cables

I dont have PCI infront of me, but I think there is a section on developing/designing the aircraft cables(thats what we used to use) into the piece. Thats where I would start

RE: Lifting Cables


Clansman - Are you intending to embed the cables into these beams, leaving a loop exposed for lifting purposes?
 

Ralph
Structures Consulting
Northeast USA

RE: Lifting Cables

(OP)
Yes.

Clansman

If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.

RE: Lifting Cables

Two cables are more flexible and if of enough strength provide redundancy. However 1 may be satisfactory if all the requirements are met.  

RE: Lifting Cables

The 6th Edition of PCI does give some guidance on lifting loops in section 5.3.4. It recommends cable for smaller precast members only, and it recommends that cable not be used in multiple loops. We usually specify 1/2" lo-lax strand as this allows the precasters to use some of their waste materials. I've used up to five strands per loop before, but would not use more as it is difficult to adequately distribute the load between multiple strands. Attached is some additional guidance provided by the Illinois DOT.

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