Architectural · A-E86X8

Fire-Rated Wall Joint Backing and Sealant Detail

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Sealant specified per project requirements is applied over joint backing, with color subject to architect approval. For fire-rated walls, Dymeric sealant is placed over Cerablanket F-S insulation at depths of one and one-half inches for one-hour walls, three inches for two-hour walls, four inches for three-hour walls, and four and one-half inches for four-hour walls. Dimensions indicate a maximum joint width of three-quarters of an inch and a three-quarter-inch typical chamfer.

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