TN-F101-12 - Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments

TN-F101-12 - Screws for Cold-Formed Steel-To-Wood and Wood-To-Cold-Formed Steel Attachments

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Screws are often used to attach Cold-Formed Steel (CFS) framing to wood members or wood structural panel decking to CFS joints or rafters.  The AISI North American Specification for the Design of Cold-Formed Steel Structural Members (AISI S100) provides design equations for screw connection capacity for CFS members.  The National Design Specifications for Wood Construction (NDS) provides design equations for fastener/connection capacity (nails, wood screws, bolts, etc.) in wood members.  The Engineered Wood Association (APA) and the building codes offer several resources for determining the capacity of screw connections attaching wood sheathing.  This Tech Note reviews these resources and discusses design and detailing of these fastener connections.