[RE-wrenches] Modules over vents

[Bruce Leininger]

Hi all.  We're designing a system on a roof that is literally infested 
with plumbing, exhaust and combustion vents.  The combustion vents are 
PVC and none of the vents are more than 1.5' above the roof.

A racking company says that we can cover them with modules, since the 
modules will be at least 4' above the roof.  They have not yet provided 
any building code references to say that this is ok.  Do any of you know 
if the building code allows this?

Thanks.

Bruce