Piping-Through-Roof-Deck.pdf

This is a technical drawing specification document detailing roofing and piping installation procedures for built-up roofing (BUR) systems. The document provides comprehensive construction guidance for routing hot and cold piping through roof decks with proper weatherproofing and insulation measures. The specification outlines the required materials and installation methods, including wood nailers secured to the roof deck with appropriate fasteners in two rows spaced 24 inches on center in a staggered pattern, specified BUR insulation, gravel surfacing, and two-ply stripping flanges set in asphalt cement and mechanically fastened at 3-inch intervals. The drawing (Drawing No. 18, not to scale) specifies that metal flanges must be primed before stripping application and that pipes must slope downward and away from the hood to facilitate drainage. Fasteners are to be spaced at 8-inch intervals, and sheet metal collars and hoods must include cross breaks or slopes for proper water drainage.

The specification emphasizes critical weatherproofing details for cold climates, requiring insulation of the interior metal work to prevent condensation and thermal issues. The sheet metal hood assembly includes a closure detail with asphalt cement seal and membrane application to ensure a watertight installation. The document provides standard construction details without pricing information, set-asides, funding sources, or contract terms, functioning solely as a technical reference guide for construction execution and material specifications.