Structural · S-RFVQX

HSS Beam to Timber Purlin Blocking Connection

Materials

Steel Timber / Wood

Elements

Beams Roof / Floor Openings

Connections

HSS Connection Bolted Connection Expansion / Slip Connection Timber / Mass-Timber Connection

About this detail

New full-depth four-inch laminated veneer lumber or laminated strand lumber blocking fills each bay, secured at each end with staggered Simpson A35 framing clips on each side. A three-eighths-inch diameter lag screw passes through slotted holes in the hollow structural section beam into the existing purlin with a four-inch minimum penetration. Three-eighths-inch by four-inch by nine-inch side plates are welded to the blocking with a one-quarter-inch fillet weld and connected with two three-quarter-inch diameter through-bolts centered on each side. Existing sheathing rests over the top of the timber purlins, which are face-nailed with two ten-penny nails at four inches on center.

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