I'm curious what people use for mounting pipes (not masts) on larger towers
and why. For example, when mounting a dish antenna, a vertical pipe is
typically installed.
What I mostly see is galvanized rigid conduit (GRC). But galvanized
Intermediate Metallic Conduit (IMC) also exists. According to the specs
I've seen, it is 30% lighter and yet has a higher yield strength (GRC=35,000
psi, IMC=50,000 psi). Also, it is approved in the NEC for all places that
GRC is approved. So, one would think it would be a natural for tower use,
too.
One difference I'm aware of is that IMC uses a special "organic" coating on
the inside, whereas GRC is galvanized on the inside. But I can't find any
info on which that is better or worse for an outdoor tower application.
Michael
N6MEF
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|