Piping-Through-Roof-Deck.pdf

This is a technical construction drawing specification for the Middle School Roof Replacement project in Michigan, detailing the installation requirements for piping penetrations through a built-up roofing (BUR) system. The drawing provides comprehensive guidance on securing hot and cold piping through the roof deck, including specifications for wood nailers, insulation installation with staggered fasteners spaced 24 inches on center, two-ply stripping flanges set in asphalt cement and mechanically fastened at 3-inch intervals, and proper sloping of pipes to direct water away from the hood. The detail includes requirements for sheet metal collar seals, hood design with cross breaks or slopes for drainage, insulation of interior metal work in cold climates, and metal screw seal closures, all designed to maintain the integrity of the roof membrane while accommodating necessary mechanical penetrations.

The specification emphasizes weatherproofing and durability through multiple seal layers, including asphalt cement sealing of the membrane and proper priming of metal flanges before stripping application. Fasteners are positioned at 8-inch intervals for the hood and additional closure details are provided to ensure complete water management around the piping penetrations. This drawing is scaled as "Not to Scale" (NTS) and represents a standard roofing construction detail intended to guide contractors in proper installation techniques that meet the project's technical and performance requirements.