Flat Roof Steel Truss Span Tables

Keep in mind that these tables are for estimations only.

Flat roof steel truss span tables.

Metal plate connected wood trusses hib 91 by permission of truss plate institute inc. The figures are based on quality materials. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Intermediate bearing simple span trusses header beam pocket floor truss supporting header beam.

The above spans are based on american softwood lumber standard sizes. 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. The more complex the truss framework is the greater quantity of these joints will be required.

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. 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. 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. The same thing is true for the bridge of the truss.

Use these two tables for roof rafters with a slope greater than 3 in 12. 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. Roof truss span chart.

Roof floor truss manual 7 31 08 10 43 am page 11. They have not been updated for the change in lumber values within the last decade. Typical roof truss design spans. 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.

These steel joints are needed to support the overall truss. The load span tables shown below demonstrate only a tiny subset of the possible combinations available with trussteel cfs roof trusses. Attached flat roof 1ao page14. Rafter span tables use these two tables for roof rafters with a slope of 3 in 12 or less.