Structural · S-857WC

Cold-Formed Steel Wall Bridging and Web Penetrations

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Cold-formed steel bearing walls, exterior walls, and shear walls utilize horizontal bridging composed of one and one-half inch flat straps, notched channels, or X-bridging matching the gauge of the stud on each side with a minimum twelve inch lap splice. Straps are fastened with number ten screws at each stud and four number ten screws on each side at lap splices. Blocking is located at the last two spaces at each end of the wall, adjacent to openings, at strap laps, and at sixteen feet zero inches on center maximum, with a second block required as needed at the end of walls. Wall horizontal bridging is provided at sheathing joints or four feet zero inches on center vertically at all walls when proper sheathing is attached to each flange of studs, and additional bridging is provided in accordance with the stud manufacturer when sheathing is not provided on both sides. Flanges of studs, joists, and rafters shall not be notched or cut. Openings in webs are centered in the web and require no reinforcement for penetrations with a diameter less than or equal to one inch, except as noted. Penetrations with a maximum diameter equal to the joist or stud depth require a plate of full width by three times the diameter of the penetration, matching the gauge of the plate to the stud or joist, fastened with number ten screws at four inches on center at four edges of the plate. Capacity verification by the structural engineer is required for any openings located at concentrated loads or bearing ends.

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