Curbing heights for HVAC
Curbing heights for HVAC
(OP)
I have had a couple of projects recently where I had to design the roof structure to support HVAC equipment loads. I noticed that the HVAC unit suppliers supplied two heights of metal curbing (14" & 16") in addition to an option of the unit just sitting on 4X4 wood rails.
My question is, are there any particular mechanical factors that would prompt one to choose one curbing height over another, or is it just the sheer size of the unit involved? Just curious. Seems like the 14" height is pretty standard as are the 4X4's.
My question is, are there any particular mechanical factors that would prompt one to choose one curbing height over another, or is it just the sheer size of the unit involved? Just curious. Seems like the 14" height is pretty standard as are the 4X4's.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask





RE: Curbing heights for HVAC
RE: Curbing heights for HVAC
If so, then why don't the manufacturers list the size of the curbing that is standard to use with the equipment? I have not seen this done. I had to go thru all sorts of gyrations to get the information.
Again, just curious...
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Curbing heights for HVAC
RE: Curbing heights for HVAC
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Curbing heights for HVAC
This can be issue in buildings with relatively low storey heights.
So you can say curb is system-specific rather than AHU-specific, and that is why it is not tied to some models - it is assembled during design and having more options is allways useful for designer.
RE: Curbing heights for HVAC
if you have the madel # of the unit
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RE: Curbing heights for HVAC
Beats me why, but it does.