Architectural · A-94W5K

Expansion Joint Deck to Deck

Materials

Elements

Columns Beams Walls Roofs Decks Bracing Expansion / Control Joints Waterproofing / Flashing Insulation Drainage Connections / Plates Roof / Floor Openings

Connections

Expansion / Slip Connection

About this detail

This roof expansion joint assembly features single-ply membrane roofing applied over rigid insulation and a one and one-half inch metal roof deck bearing on a steel beam. The joint opening is bridged by a continuous neoprene closure with a three-inch foam rod that is one and one-half times larger than the expansion joint, with the single-ply membrane extended up and over the foam rod and secured to two-by-four pressure-treated wood nailers. A two-inch fiberglass insulation filler occupies the space between the structural framing elements. The adjacent roof drainage assembly includes roof drains, overflow drains with a two-inch collar, tapered insulation, and underdeck clamps supported by roof sheathing. General notes specify that the plumbing contractor must install all roof drain assemblies and accessories, including Unistrut, pipe clamps, cleanouts, and heavy-duty Hubb bands for PVC pipe connections.

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