Torsional effect by Pipe on Beam or Girder

[Gnoowii]

Dear Alls,

When designing steel piperack, Pipe (or cable) is supported on the top of the beam with pipe shoe. Suppose that there is horizontal force caused by friction force or anchor force, There should be torsional effect on the beam somehow. However I don't see any example that the torsional effect due to that is considered when designing piperack or steel structures.

From that Idea, physical modeling are supposed to be conducted in general but we don't.

Is there any specific reason that we just ignore the torsional moment? like the eccentricity is too small to be considered.

 

[HTURKAK]

The specific reason is, this is compatibility torsion and with a small rotation of the supporting beam will be substatially reduced. The result would be redistribution of moment developing at the pipe.
....

He is like a man building a house, who dug deep and laid the foundation on the rock. And when the flood arose, the stream beat vehemently against that house, and could not shake it, for it was founded on the rock..

Luke 6:48

 

[1503-44]

Full Anchors may not be permitted to allow rotation, so be careful with those.

--Einstein gave the same test to students every year. When asked why he would do something like that, "Because the answers had changed."