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Strut
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==Architecture and construction== Strut is a common name in [[timber framing]] for a support or brace of [[scantling]]s lighter than a post. Frequently struts are found in roof framing from either a tie beam or a king post to a principal rafter. Struts may be vertically plumb or leaning (then called canted, raking, or angled) and may be straight or curved. In the U.K., strut is generally used in a sense of a lighter duty piece: a king post carries a ridge beam but a king strut does not, a queen post carries a plate but a queen strut does not, a crown post carries a crown plate but a crown strut does not. Strutting or [[Dwang|blocking]] between [[joist|floor joists]] adds strength to the floor system. Struts provide outwards-facing support in their lengthwise direction, which can be used to keep two other components separate, performing the opposite function of a ''[[tie (engineering)|tie]]''.{{clarify|date=May 2018}} In piping, struts restrain movement of a component in one direction while allowing movement or contraction in another direction.<ref>[http://www.pipingtech.com/products/ptpcat/spring/sway/index.html Sway Strut Assemblies] Piping Technology & Products, (retrieved March 2012)</ref> [[Strut channel]] made from [[steel]], [[aluminium]], or [[fibre-reinforced plastic]] is used heavily in the building industry and is often used in the support of [[cable tray]]s and other forms of [[cable management]], and pipes support systems.
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