Flat Roof Steel Truss Span Tables

Keep in mind that these tables are for estimations only.

Flat roof steel truss span tables.

Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Roof floor truss manual 7 31 08 10 43 am page 11.

Typical roof truss design spans. The above spans are based on american softwood lumber standard sizes. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. R cb150 16 beam span table used w 3600 width of frame rafter span χ 6410 fascia beam span the cb150 16 beam achieves the 6000mm span for the fascia beam and can be used for the rafters.

The more complex the truss framework is the greater quantity of these joints will be required. Intermediate bearing simple span trusses header beam pocket floor truss supporting header beam. 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. The same thing is true for the bridge of the truss.

Attached flat roof 1ao page14. 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. They have not been updated for the change in lumber values within the last decade. These steel joints are needed to support the overall truss.

Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. Rafter span tables use these two tables for roof rafters with a slope of 3 in 12 or less.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Roof truss span chart. The tables below give maximum spans for rafters and beams. Use these two tables for roof rafters with a slope greater than 3 in 12.