lifting cables

huangyhg

lifting cables
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
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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
clansman - are you intending to embed the cables into these beams, leaving a loop exposed for lifting purposes?
  
ralph
structures consulting
northeast usa
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.fff">
two cables are more flexible and if of enough strength provide redundancy. however 1 may be satisfactory if all the requirements are met.  
the 6th edition of pci does give some guidance on lifting loops in section 5.3.4. it recommends cable for smaller precast