Metal Roof Joist Spacing

Let s take a look at the most common types of metal roofs for houses.

Metal roof joist spacing. I have built a few spec homes and used engineered wooden trusses at 8 feet on center with 2x4 s as ceiling joists and purlins vertically between the top and bottom chords of the trusses. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. Ceiling joists of the first floor of a two story structure often serve as floor joists for the second floor. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.

The roofing is manufactured in panels that. After all the roof joists have been installed take the time to measure the spacing again. Truss spacing for metal roof i always thought 4 oc was standard for building pole barns using metal roofing. Pole buildings with metal roofs are typically built with metal roofs resting directly.

Builders aren t bound by standard rafter spacing measurements. Just because one material may be stronger than another doesn t mean the. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.

Depending on loads and spans c joists are typically spaced at 12 16 19 2 or 24 on center spacing. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Structural track usually in the same gauge as the. Provide a lightweight low cost rigid floor assembly c joist components provide an economical lightweight alternative to open web trusses bar joists engineered lumber cast in place or hollow core floor assemblies.

The figures are based on quality materials. Installing wood stripping under a tin roof. Before installing any roof joists always measure the area at least twice. Tin roofing also known as metal roofing is considered more durable than composition or wood shingles.

Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available. Joist span tables use these tables to determine lengths sizes and spacing of ceiling joists. Rafter spacing is based on the width of the metal roofing panels. Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load.

If this is the case with your structure use the floor joist table to determine maximum joist length load. The tables below give maximum spans for rafters and beams. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing.