Long Span Steel Roof Truss

Options to set the roof girders on wood post or concrete wall also available.

Long span steel roof truss.

Long span roof designing buildings wiki share your construction industry knowledge. Alpine truss designs are engineered to meet specific span configuration and load conditions. In the engineering and construction industry any truss spanning more than 60 feet is considered to be long span thus requiring engineering consideration per international building code ibc 2015 section 2303 4 trusses for design of. In a conventional pratt truss diagonal members are in tension for gravity loads.

A sl series truss is a single slope truss that includes steel girders and steel columns with clear span widths from 10 through 80 with available eave heights of 8 through 20. Long span roofs are generally defined as those that exceed 12 m in span. This type of truss is used where gravity loads are predominant see below left. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.

Pratt trusses are commonly used in long span buildings ranging from 20 to 100 m in span. They are commonly found in a wide range of building types such as factories warehouses agricultural buildings. When spaced 10ft they will withstand 110mph winds and 32 lbs ft snow load. Long span roofs can create flexible column free internal spaces and can reduce substructure costs and construction times.

The purpose of this article is first to explore and explain various aspects of building with long span open web trusses including. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20.