Subject:
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Re: Crane
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 27 Nov 2003 22:31:05 GMT
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Viewed:
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2318 times
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In lugnet.technic, Erik Bush wrote:
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In lugnet.technic, Luis Hernández wrote:
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Luis 
(comments, instructions, death threats, etc. please remove all the X’s)
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I have tried it and that is a good idea, but it adds some extra weight
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Yes it does, but without the 2x4s, your boom will be able to shear - ie the
parallelogram created by the beams & 1x4 plates only has friction holding it
square, and a long boom built that way may fail. If the 1x4s are on the
top/bottom it reduces the risk of failing under it’s own weight, but increases
the risk of failing while lifting/slewing (and accidental hit!). Vice versa if
1x4s are on the side.
As I said, it’s a compromise to get the boom right, and that may be an
acceptable compromise.
ROSCO
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Message is in Reply To:
 | | Re: Crane
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| (...) I have tried it and that is a good idea, but it adds some extra weight> (21 years ago, 27-Nov-03, to lugnet.technic, FTX)
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