Holdown (holdown, hold-down, or hold down) or tie-down in
structural engineering refers to the steel device or hardware that is installed at the end of a plywood
shear wall
In structural engineering, a shear wall is a vertical element of a system that is designed to resist in-plane lateral forces, typically wind and seismic loads. In many jurisdictions, the International Building Code and International Residential Co ...
. The hold downs provide uplift resistance against the overturning moment imposed on the wall due to "in-plane" lateral load applied at the top of the wall. A hold-down may also refer to clamping device used to anchor a pipe to a structural steel element or concrete floor or allow movement of the pipe in an axial direction.
Hold-Down Pipe Clamps
Piping Technology and Products, (retrieved May 2012).
At the bottom, the hold down is connected to the concrete foundation or structural slab by an ''embedded'' or ''epoxied'' anchor bolt
Anchor bolts are used to connect structural and non-structural elements to concrete.. The connection can be made by a variety of different components: anchor bolts (also named fasteners), steel plates, or stiffeners. Anchor bolts transfer diffe ...
. At the top, the hold down is connected to a wood post with screws, nails or bolts.
References
{{DEFAULTSORT:Hold Down (Structural Engineering)
Structural connectors