Architectural · A-KFEB7

Shaftwall Partition and CLT Floor Junction Detail

Materials

Concrete Steel Timber / Wood Gypsum / Drywall

Elements

Walls Partitions Stairs Floors / Slabs Expansion / Control Joints Waterproofing / Flashing Insulation

About this detail

This assembly details a fire-rated shaftwall partition intersecting a cross-laminated timber floor structure. The floor consists of a three-ply CLT panel topped with a resilient sound underlayment, a four-inch concrete topping slab, and a scheduled floor finish. The partition framing incorporates steel CH or CT studs spaced twenty-four inches on center, a one-inch shaft liner panel, and single layers of five-eighths-inch Type X gypsum wallboard sheathing or equivalent on each side. A continuous J runner is mechanically fastened at the floor intersection, and a two-hour rated continuous joint system is integrated at the junction. A horizontal control joint is spaced every thirty feet on center along the vertical shaft.

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