Flat Roof Steel Truss Span Tables

The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses.

Flat roof steel truss span tables. Included are a series of representative roof truss span tables that will give you an idea of the truss spans available for a particular load condition load duration lumber type and truss configuration. The same thing is true for the bridge of the truss. Intermediate bearing simple span trusses header beam pocket floor truss supporting header beam. 05425 cold formed steel trusses roof truss spans every trussteel roof truss is a custom design based upon the unique load span bearing use and code criteria of a particular project.

Flat roof span tables allow for a maximum roof pitch of 5º. Pitching beams 23 common installation details 25 notches cuts and holes in beams. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center.

Straight line interpolation shall be permitted for intermediate spans and design values. Roof beams 20 verandah beams 22 garage roof. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. Keep in mind that these tables are for estimations only.

The more complex the truss framework is the greater quantity of these joints will be required. 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. The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter. They have not been updated for the change in lumber values within the last decade.

Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. Tables such as those for rafters. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m.

Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier. These steel joints are needed to support the overall truss. Metal plate connected wood trusses hib 91 by permission of truss plate institute inc.