Steel Roof Joist Spacing

Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.

Steel roof joist spacing.

So the space between rafters can be greater without reducing the maximum span. Steel joists joist girders. Measure from the ends. Truss spacing for metal roof it all comes down to engineering.

Spacing in exterior exposure. Maximum rafter spans for a patio roof. If the roof is not completely square you can decrease the space between joists but never increase the space. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry.

Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height. Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. Pullout values decrease if the fasteners protrude completely through the purlins. Especially when steel roof truss spacing is concerned some engineers would argue that it is possible to only have a roof truss spacing of four feet off center even eight feet has been suggested.

Typically used in non residential construction steel joists and joist girders provide an economical system for supporting floors and roofs. When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels. A roof joist is always spaced no more than 16 inches apart from another roof joist. In other words you would space a roof joist 15 inches apart from another roof joist but never 17 inches apart.

The same concept holds true for roof trusses. When using purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike. Since 1 nominal lumber and solid decking are thinner they provide somewhat lower pullout values.