Roof Curbs

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Author Message Brian Payne, AIA Senior Member Username: brian_payne Post Number: 126 Registered: 01-2014 Posted on Friday, January 26, 2018 - 10:47 am:    I was wondering how everyone usually handles MEP pre-manufactured roof curbs. I have found that some Mechanical engineer's provide a spec section, others just note on their drawings to provide a curb, similar to XYZ company, others assume the architect covers it. Should an architect take ownership of the product selection? Seems like unnecessary risk especially with acoustics. James Sandoz, AIA, CSI, CCS, CCCA Senior Member Username: jsandoz Post Number: 228 Registered: 06-2005 Posted on Friday, January 26, 2018 - 11:12 am:    It is certainly prudent to at least be aware of what the MEP is specifying and to ensure those items are compatible with the roofing system selected for the project. Unfortunately, like access doors, roof curbs are one of those "who's baby is it" items that frequently falls through the cracks. Ellis C. Whitby, PE, CSI, AIA, LEED Senior Member Username: ecwhitby Post Number: 363 Registered: 03-2003 Posted on Friday, January 26, 2018 - 12:02 pm:    James; Too true. I remember a project where the MEP presumed that wood 4x4's laid on the single ply were sufficient. When I pointed out that wood sleepers might be acceptable for light commercial or residential, on healthcare they didn't cut it, the MEP was quite miffed. Additionally the roof deck was VEd from composite deck to just steel roof deck and the units were not over either the beams or girders. Joy all around. John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1734 Registered: 03-2002 Posted on Monday, February 05, 2018 - 12:42 pm:    I prefer that the architect take control of this so that it is appropriately coordinated with the roofing system used. Sometimes they can also be used by more than one trade, so there is a benefit to having one section for this. However, if each MEP engineer is specifying them, the lead can still be taken by the architect to advise them of what the criteria are for the product so you get what you want. I think the worst case is just to let the engineer pick whatever they want. It may be perfect, but it may be bad.