Framing Anchors, Hangers, and Ties Information
Framing anchors, framing hangers and framing ties are used for anchoring rafters and trusses to plates, floor and ceiling joists to headers, and solid blocking to plates. Framing anchors are typically made from sheet metal, and have pre-punched holes to accept nails. Anchors provide an accurate and positive connected between wood pieces by allowing the nails to secure the framing anchor to load laterally, rather than in partial withdrawal. Framing anchors are commonly used in framing construction for protection against strong winds and other forces. Selecting framing anchors, framing hangers and framing ties requires an understanding of application requirements. Anchors are suitable for most joints in framing wood 2-ft. (38 mm) and thicker. The load capacity for framing anchors is affected by the steel thickness selected. 18-gauge zinc-coated sheet steel is common in standard framing anchors. For medium or heavy-duty anchors, the zinc-covered sheet steel is often 12-gauge or 7-gauge. Framing anchors come with special nails, which are required for use with each anchor to provide the load carrying capacity and avoiding eccentricity. Framing anchors, framing hangers and framing ties include products for connecting joists and purlins. Hangers are used to connect joists and purlins to supporting wood pieces. They can be used to reduce the overall depth of flooring or a roof assembly, or to reduce space below the framing when joists are adjacent to headers - rather than on top of them. Joists and purlin hangers and are manufactured from light gauge galvanized sheet metal. Like framing anchors, hangers require special nails and for the specified number of nails to be used for load-carrying capacity. Typical hanger sizes for wood joists range from 2-ft. x 4-ft. (38 x 89 mm) to 4-ft. x 14-ft. (89 x 377 mm). Framing anchors, framing hangers and framing ties are connectors. Ties come in many different shapes, including angle, bracket, corner connection, flat tie connectors, and T-shape. There are many different types of ties available, depending on the application. Uses for ties include providing an easy to install connection between the stud and the upper or lower tracks; providing a tension connection between a stud and a plate member(s); protection against wind and seismic forces; rigidity and support; and fit with several truss chords to give uplift resistance.