Clip/Lug calc on Non-rectangular shapes
Clip/Lug calc on Non-rectangular shapes
(OP)
Can COMPRESS perform a Clip/Lug calculation on a Non-rectangular attachment such as a channel shape?
Thanks!
Thanks!
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Clip/Lug calc on Non-rectangular shapes
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RE: Clip/Lug calc on Non-rectangular shapes
I don't understand what "channel shape" but if you give us an explanation or picture (!!) it would help a lot. If it means that lifting lug is attached to shell with two separate welds you should be able to calculate lifting lug attaching a reinforcement pad (thick enough) with width equal to distance of the attachment welds of actual lifting lug. Just make sure that distance from shell to load is correct to get moments calculated right.
RE: Clip/Lug calc on Non-rectangular shapes
Thanks.
RE: Clip/Lug calc on Non-rectangular shapes
A channel section is a type of extruded structural shape most often used for relatively light beam applications: http:
In particular, a C8x11.5 (ie a Channel section which is nominally 8" high and weighs 11.5 lbs/ft) is probably the most commonly used structural shape for vessel platforms in the USA. What's a bit unusual is that the channel is usually bolted on to a rectangular clip cut from plate which is welded to the vessel. I've rarely seen structural shapes welded directly to the vessel...
jt
RE: Clip/Lug calc on Non-rectangular shapes
In my experience, "good practice" would dictate attaching structural sections (for piping, platforms, etc) to the shell by a bolted or welded connection to a pad plate or tab as jte describes. But this may not always be the case and a more sophisticated analysis may be warranted.
Nozzle Pro (All Pro) finite element analysis software from Paulin Research Group (www.paulin.com) provides a number of templates for structural attachments to the vessel, permitting a relatively simple method for performing the finite element analysis. Nozzle Pro includes templates for structures such as channels, wide flanges, and many other shapes.
Tom Barsh
Codeware Technical Support