Roof Framing Struts

Purlins are placed under rafters in a perpendicular position on edge not flat.

Roof framing struts.

The braces struts or kickers should be within every 4 and should not be at a greater than a 45 degree angle towards the roof slope lower side. The struts are needed in the roof frame to transfer the loads from underpurlins and other beams to the load bearing walls. 3 inch rise per 12 run is a 3 12 pitch roof. So called because it is the horizontal beam that supports the ends of the rafters at the ridge.

4 12 through 9 12 are the most common pitches. Struts are generally more efficient the closer they are to the vertical. Flex strut concrete inserts are the ideal solution for easily installed anchors to concrete foundations. Struts should be adequately supported over studs in timber walls.

Struts may be vertically plumb or leaning then called canted raking or angled and may be straight or curved. Medical support systems by unistrut service company ensure project success we understand the medical equipment industry. Frequently struts are found in roof framing from either a tie beam or a king post to a principal rafter. With today s heavy medical equipment and increasingly stringent design criteria unistrut can design fabricate and install overhead structural supports for demanding hospital medical center or out patient clinic applications.

They transfer the load of the roof to load bearing walls. In the u s it is defined by the rise in inches to a 12 run. It is often used to prevent separation of the rafters during high winds but can also be used simply to frame the ceiling. They should have anti slip blocks where necessary to prevent them sliding horizontally.

Strutting beams support the roof members where there are no load bearing wall studs available. A diagonal member of the truss that has a compressive force acting on it and used to maintain rigidity and add strength to the structure. Definition of structural ridge or ridge beam used in roof framing a structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself. The purlins are supported by vertical or slightly angled bracing.

A horizontal beam that connects two rafters near the ridge of a roof. Made from cold rolled steel and available in pre galvanized pg hot dip galvanized hd and stainless steel finishes type 316 st6 or 304 st4 our inserts are designed for high performance and reliability in every application throughout the construction and civil engineering industries. Vertical rise over horizontal run.