Specifying Steel Cable Closure

Question

Specifying Steel Cable Closure

CFSEng (Structural)

(OP)

4 Apr 07 09:36

I am designing a steel cable (about 5 ft long) used to support 650 lbs from a bar joist. If I'm using a 1/8" dia 7x19 cable, how do I design / specify the closure of the cable assuming I'm going to loop it around the joist?

Thanks for the help.

youngstructural (Structural) · Answer 1 · 2007-04-04 17:41:46

I can't picture a place where I would do this, but assuming that there is some logical reason that a more robust solution such as a rod or HSS tension member cannot be used, you will want to look into catalogues for cable connections. These are typically done for guy-wire anchoring and other such specialist applications. Be careful as I have yet to see such a catalogue with data to limit states design (LRFD); I believe you're going to have to be working stress design for your connections.

Good luck,

YS

B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...

kelowna (Structural) · Answer 2 · 2007-04-05 12:42:50

rope clips are the cheapest and easiest thing
see attached

http://www.cgedwards.com/Crosby/Crosby-PL1.html
http://catalog.thecrosbygroup.com/body_046.htm
http://catalog.thecrosbygroup.com/BODY_028.HTM

JStephen (Mechanical) · Answer 3 · 2007-04-05 13:15:17

A lot of the catalog information will give breaking strength rather than, or in addition to, allowable load.

The strength of a loop of wire rope is reduced considerably if it goes around a sharp edge; take that into account.

If this is a one-off detail, it would be pretty cheap to considerably overside the cable.

CFSEng (Structural) · Answer 4 · 2007-04-05 13:30:55

kelowna,
Thanks for the links, that was what I was looking for.

JStephen,
Based on calcs, a rather small wire will work so yes, I'm going to oversize so I don't have to worry about it.

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Specifying Steel Cable Closure