Posi Joist Roof Span Tables

Try our interactive span checker to find the posi joist suitable for your project.

Posi joist roof span tables.

Posi rafters posi rafters combine the lightness of timber and strength of posi strut steel webs to provide a quality roof system that can span further than alternative timber products. Posi rafters are becoming increasingly popular for roof applications. You will be given a range of depths and centres that are available and also an indicative deflection result. They can even be curved to create a dynamic roof line effect.

Simply enter the required span to see a range of results that will work. Flat roof joists rafters purlin span tables for domestic floor joists to bs 5268 7 1 note. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. For definitive information please contact an easi joist manufacturer.

Easy access for services on site also means the structural integrity of your design can t be compromised. Spans are for guidance only. Posi joists can incorporate a trimmable end incorporating a solid timber block which can be engineered to give up to 130mm allowance at each end for trimming on site. The following easi joist span tables are to be used as a basic guide to achievable joist span for given depth and spacing and should be used for estimating of feasibility only.

This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Drilling through solid timber beams isn t the ideal scenario. In addition end details of the posi joist can be altered to give a variety of support conditions. View joist rafter tables.

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. Mitek s posistruts are the perfect engineered solution and can even be trimmed to length on site. Due to variations in timber grades load sets support conditions and bearing widths the tables are not suitable as a design tool. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Posi joist combines the lightness of timber with the strength of the posi strut steel web allowing you to span far greater distances than would be possible with alternative timber products. Posi joists mitek manufactures the steel webs used in posi joists.