Steel Roof Rafter Spacing

For the lighter material such as lightweight aluminum the common spacing length is 4 inches of clear gap.

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. Rafter spacing depends on the roofing panel size. Measure each section of the roof from. Keep it at 24.

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. The same concept holds true for roof trusses. Never seen anyone use 2 x 4 s always 1 x 4 s. Again make sure to consult local codes.

Do not use pressure treat wood for the purlins it will eat up the metal roofing and screws. 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 heavier material such as gage steel the metal roof purlins spacing length could go up to 4 feet. 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.

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. Twenty four inches is a common spacing of furring strips for a metal roof. This is most likely the standard size that you will find on pre made roof trusses. Rafter spacing for metal roof.

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. So the space between rafters can be greater without reducing the maximum span. The typical spacing standards for residential and commercial buildings are about 1 to 2 foot. It is always better to have a large rafter rather than be concerned with a sagging roof.

There are two double trusses 7 apart and spaced at 12 foot centers in the middle. Configuring your metal roof batten layout access the roof using an extension ladder. I want to cover the rafters and trusses with thick sheetrock then paint to hide the added insulation and wiring. Typical standard the typical standard for the spacing on the roof trusses is 24 inches.