Roof-Drain-with-Gravel-Guard.pdf

This is a technical drawing specification document related to a Middle School Roof Replacement project in Michigan. The drawing, designated as DWG NO. 37, provides detailed specifications for a hot/cold roof drain assembly with gravel guard designed for built-up roofing (BUR) systems. The specification includes a 24-inch square configuration and outlines the component assembly from top to bottom: gravel surfacing, two-ply stripping, specified BUR membrane sheet, deck clamp, strainer/dome with clamping ring, lead/metal flashing, gravel retainer, two-ply stripping, insulation, and roof deck as specified. The drawing is scaled as "not to scale" (NTS) and dated 2023.

The document includes a critical construction note requiring that all metal surfaces coming into contact with adhesives be primed prior to installation. This specification ensures proper adhesion and longevity of the built-up roofing system components. The technical drawing serves as a reference standard for contractors bidding on or executing the roof replacement work, establishing the required materials, assembly configuration, and installation procedures for roof drain installations as part of the overall roofing project scope.