Open Web Roof Joist Span Table

No more custom made floor trusses.

Open web roof joist span table.

Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Additional dead loads are due to various combinations of construction materials. Also available for the android os. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.

For an in depth review of all of this information the sji suggests the current compilation of all years specifications and load tables 90 years of open web steel joist construction. Open web steel joists are an engineered truss like construction component used to support loads over short and long spans alike. Live loads of 40 psf assumed. Do not install them upside down.

The minimum bearing length is 1 spans values in bold indicate that web stiffeners are required at the osb end panel. Open web steel joists k series. Important notes on span tables. Spans are based on uniformly loaded joists and include allowances for repetitive use members.

Loads for span increments not explicitly given in the load table may be determined using linear interpolation between the load values given in adjacent span columns. Dead load deflection is limited to l 360 and total load deflection is limited to l 240. These tables originally appeared in the steel joist institute specifications and load tables commonly referred to as a catalog beginning with the first edition published in 1932. Trimjoist is the marriage of an open web floor truss and a trimmable wooden i joist bringing the best features of each to the relationship.

For the proper handling of concentrated and or varying loads see section 2 3 in the code of standard practice for steel joist and joist girders. Of bearings and is based on uniformly loaded joists. Open joist is a revolutionary open web all wood floor truss engineered with superior strength and load carrying capabilities. Span calculator for wood joists and rafters also available for the android os.

Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability. Find span carts for open joist products. The maximum span is measured o c. Typically used in non residential construction steel joists and joist girders provide an economical system for supporting floors and roofs.

Each load table was accompanied by notes and instructions covering assumptions and other important information. All trimjoist products are cambered to compensate for dead load deflections.