Flat Roof Steel Truss Span Tables

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.

Flat roof steel truss span tables. Roof floor truss manual 7 31 08 10 43 am page 11. 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. These span tables assume installation of at least three joists or rafters that are spaced not more than 24 on center. The same thing is true for the bridge of the truss.

Metal plate connected wood trusses hib 91 by permission of truss plate institute inc. Tables such as those for rafters. Intermediate bearing simple span trusses header beam pocket floor truss supporting header beam. Straight line interpolation shall be permitted for intermediate spans and design values.

These steel joints are needed to support the overall truss. 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. 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. Flat roof span tables allow for a maximum roof pitch of 5º.

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 more complex the truss framework is the greater quantity of these joints will be required. Roof beams 20 verandah beams 22 garage roof. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge.

Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier. Pitching beams 23 common installation details 25 notches cuts and holes in beams. Keep in mind that these tables are for estimations only. The calculated spans assume fully supported members properly sheathed and nailed on the top edge of the joist or rafter.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. 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.