Free Span Roof Trusses

Alpine truss designs are engineered to meet specific span configuration and load conditions.

Free span roof trusses.

24 28 30 32 34 36 38 40 42 44 48 50 60 truss. The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers. Trusses are professionally designed with state of the art computer programs. Roof truss design 1 24 span 2 web with plywood gussets figure 1 figure 1 roof truss 24 span 2 web with plywood gussets detailed information for a 2 web roof truss with a 24 span with plywood gussets.

Dec 15 2013 free truss plans. The run or the base number is 12 inches. The more complex the truss framework is the greater quantity of these joints will be required. The rise will be the elevation change over the 12 inches.

These steel joints are needed to support the overall truss. Each truss bears the truss plate institute tpi stamp for quality assurance. The lumber components are precision cut and assembled together with galvanized steel truss plates in a factory controlled environment. As well running an attic air duct system can be very difficult if the roof trusses were not designed for that application.

Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run. The same thing is true for the bridge of the truss. Total load psf duration factor live load psf roof type 55 1 15 40 snow shingle 55 1 15 30 snow tile 47 30 snow 40 20 snow 1 25 20. Residential trusses save time and materials compared to conventional hand framing.