Steel Roof Rafter Spacing

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.

Steel roof rafter spacing.

So the space between rafters can be greater without reducing the maximum span. 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. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. I want to cover the rafters and trusses with thick sheetrock then paint to hide the added insulation and wiring.

Rafter spacing for metal roof. Do not use pressure treat wood for the purlins it will eat up the metal roofing and screws. 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. The same concept holds true for roof trusses.

Twenty four inches is a common spacing of furring strips for a metal roof. Never seen anyone use 2 x 4 s always 1 x 4 s. This is most likely the standard size that you will find on pre made roof trusses. Measure each section of the roof from.

Rafter spacing depends on the roofing panel size. It is always better to have a large rafter rather than be concerned with a sagging roof. For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap. Again make sure to consult local codes.

The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. This allows the panels to be securely attached to the rafters for maximum stability. The 2 x 6 rafters are spaced 24 on center the length of the barn. There are two double trusses 7 apart and spaced at 12 foot centers in the middle.

Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Configuring your metal roof batten layout access the roof using an extension ladder. Keep it at 24. For heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet.