Hi all, I have a client asking about running a duct over a pre-engineered canopy structure (specifically the product is Extrudeck, they want to run a duct between the top pf the canopy and the structural cables). They are asking me about mounting requirements - I know SMACNA standard states an 8" clearance between top of "roof" and bottom of duct but they want to run it lower. I've looked through IMC and IBC but can't find anything about this and I'm not totally sure this would count as a roof anyway. Anyone have any idea if mounting lower would go against code? Thanks