FAQ #146
Support Requirements for Bent Tubes

Last Updated On 09/15/2015 08:42 PM by

jrounds77

Question
We want to put a bend right in the middle of the RRH section between points S and B. Does the rule B8.3.1.1, saying that bent members may not extend longer 28 in between named points, allow supporting members to be added?



or



I have a bend in the SIM, and the distance between Point S and Point D is greater than 28". What support is required?





 




Answer
a) For bent tubes longer than 28in. AND a bend less than 30deg, a single secondary member must extend from the bend to a Named Point.



b) For bent tubes longer than 28in. AND a bend greater than 30deg, two secondary members must extend from the bend to two Named Points.





i.e.

- a bent SIM of less than 30 degrees may be supported by Point Q on the LFS

- a bent RRH may be supported by Points A, C or R

- a bent LFS may be supported by Points D, S or Q

Rule Numbers
2015:B8.3.1.1 
2015:B8.3.6