Steel Roof Joist Spacing

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.

Steel roof joist spacing.

Live load psf dead load psf span calculator for wood joists and rafters available for the iphone. 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. Pole barn roof truss spacing generally tens to operate according to similar spacing principles though there are some proponents of having higher pole barn roof truss spacing. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike.

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. This allows the panels to be securely attached to the rafters for maximum stability. Pullout values decrease if the fasteners protrude completely through the purlins. Span calculator for wood joists and rafters also available for the.

Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height. 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. When using purlins fabral recommends a maximum spacing of 24 on center note that 5v requires solid decking.

If the roof is not completely square you can decrease the space between joists but never increase the space. Steel joists joist girders. The same concept holds true for roof trusses. A roof joist is always spaced no more than 16 inches apart from another roof joist.

Maximum rafter spans for a patio roof. Measure from the ends. So the space between rafters can be greater without reducing the maximum span. In other words you would space a roof joist 15 inches apart from another roof joist but never 17 inches apart.