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July 2007 
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Curb appeal | Technical ElementsJoan P. Crowe
If you use The
NRCA Roofing Manual: Mem brane Roof Systems—2007, you
should note that NRCA has reformatted its construction
details pertaining to curb design. The manual's previous edition,
The
NRCA Roofing and Waterproofing Manual, Fifth Edition,
provided details for the following curb conditions:
- Rooftop air-handling unit with a prefabricated metal curb
(Details BUR-12, MB-12, TP-12 and TS-12)
- Rooftop air-handling unit with a job site-constructed wood curb
(Details BUR-13, MB-13, TP-13 and TS-13)
- Skylight, scuttle and smoke vent (Details BUR-14, MB-14, TP-14
and TS-14)
In the 2007 edition, NRCA addresses these details by curb type
rather than penetration type. The curb construction details now are
referred to as:
- Insulated prefabricated metal curb (Details BUR-13, BUR-13A,
MB-13, MB-13A, EPDM-13 and SP-13)
- Prefabricated metal curb (Details BUR-14, BUR-14A, MB-14,
MB-14A, EPDM-14 and SP-14)
- Wood curb (Details BUR-15, BUR-15A, MB-15, MB-15A, EPDM-15
and...
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