Curb-for-Air-Handling-Unit.pdf

This is a technical drawing specification document for a curb-for-air-handling-unit assembly related to a Middle School Roof Replacement project in Michigan. The drawing (DWG NO. 03) provides detailed construction specifications for a built-up roofing (BUR) hot/cold base flashing curb designed to accommodate air handling units on the roof system. The specifications include a minimum 16-gauge frame with wood curb construction, fasteners installed at 8-inch on-center spacing with 18-inch on-center counterflashing attachment, two-ply stripping with specified sealant tape, and gravel surfacing. The document indicates provisions for alternate frame locations to accommodate heavy units, with minimum two gasketed fasteners required per side and an 8-inch minimum clearance specification.

The drawing serves as a technical reference for contractors bidding on or performing work related to the roof replacement project. It establishes the standard for curb construction and integration with the specified built-up roofing system, including insulation layers, base flashing, and membrane sheet components. The document does not contain pricing information, bid response dates, award dates, or contract term details, but rather functions as a construction detail specification that contractors must follow during the installation of air handling unit curbs as part of the larger roof replacement scope of work.