Trapeze hangers and rods calculation

[Prototyp]

For production hall piping we normally use trapeze hangers made out of sectional steel for multiple pipe runs and for single pipes mostly rods mounted to the roof.

There is a lot of information available about pipe stress, thermal expansion, support width calculaton and so on but unfortunatly I don't find any information that focusses on the dimensioning of trapzes and rods.

Is there any book or webpage that can recommended regarding the calculation of trapezes and rods?
Moreover I am looking for information of how to mount pipes to the trapezes and rods.

Tahnks for help.

 

[MJCronin]

This is pretty much the most simple question for a structural engineer.

Trapeeze hangers should be used to support multiple pipes. Use pipe clamps and clevises to support individual pipes

You should:

1) Make a layout of the all of the piping and establish the best points of support based on using existing
steelwork

2) Get a total load for each hanger to support. Use the weight per foot for each pipe and your span lengths

3) Based on your highest load and length between supporting rods, select a horizontal steel member. Use the AISC formula for a simply supported beam with all weight concentrated in the middle of the beam. Use this beam size for all trapeeze hangers associated with this run of piping. Use a simple bending stress of 12,000 psi.

4) Select rods and other hardware based on catalog maximums allowable values.

This fine reference has been used for unique supports for decades:

https://s3.amazonaws.com/s3.anvilin...ture/PipeHanger_DesignEngineering_Catalog.pdf

Alternately, you could use components from a "strut" systems vendor such as "b-line" or UNISTRUT

https://www.unistrut.us/resources/sell-sheets/trapeze

MJCronin
Sr. Process Engineer

 

[MJCronin]

Please respect us and complete this thread.....

Tell us of your final decision, show us your calculations and send sketches of your proposed support designs

MJCronin
Sr. Process Engineer