Steel Roof Truss Spacing

These standards are as follows.

Steel roof truss 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. The same concept holds true for roof trusses. The typical standard for the spacing on the roof trusses is 24 inches. Typically pole barn style buildings in my area have bays distance between trusses of 5 feet to 12 depending on pitch insulation and height.

So the space between rafters can be greater without reducing the maximum span. If purlins are laying flat on top of the truss 5 or 6 feet is the max on 2x4 s edge up can go to 12 feet or more. As most building these days are using those pre made trusses on the roof 24 inches become the main size for any roofing construction when it comes to its truss installation. Truss spacing for metal roof.

Engineers have since determined however that the physical design of a post frame building will allow for standard spacing as great as 12 feet from the center when using high quality metal connector plates and lumber. It all comes down to engineering. Their programs will allow for trusses to be placed on 12 foot or even 16 foot centers and their engineers will place their engineer s seal on the drawings to verify. The manufacturers of the steel roof truss plates also referred to as gussets or gang nails provide the engineering design for pre fabricated wood trusses.