Architectural · A-ZPAEP

Seismic Expansion Joint at Rated Gypsum Board Partition

Materials

Steel Gypsum / Drywall

Elements

Walls Floors / Slabs Expansion / Control Joints Anchors / Embeds Connections / Plates

Connections

Expansion / Slip Connection

About this detail

A seismic expansion joint at a rated gypsum board partition constructed with metal studs. Two layers of five-eighths-inch Type X gypsum board are applied to each side of the partition framing. A continuous aluminum frame with an elastomeric gasket spans the joint opening, attached using sixteen-gauge sheet metal anchor plates and minimum number six sheet metal screws at twenty-four inches on center on each side. Rated fire safing insulation with a minimum depth of five inches fills the joint cavity. The gypsum board joints are taped and sanded smooth to transition seamlessly with the adjoining partition, and floor expansion joint cover plates align with the wall-mounted joint according to a two-hour UL rating designation.

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