Free Span Roof Trusses

The shapes and spans shown here represent only a fraction of the millions of designs produced by alpine engineers.

Free span roof trusses.

Dec 15 2013 free truss plans. Trusses are professionally designed with state of the art computer programs. These steel joints are needed to support the overall truss. The lumber components are precision cut and assembled together with galvanized steel truss plates in a factory controlled environment.

Each truss bears the truss plate institute tpi stamp for quality assurance. The run or the base number is 12 inches. As well running an attic air duct system can be very difficult if the roof trusses were not designed for that application. Alpine truss designs are engineered to meet specific span configuration and load conditions.

The more complex the truss framework is the greater quantity of these joints will be required. Truss capacity is. Residential trusses save time and materials compared to conventional hand framing. The rise will be the elevation change over the 12 inches.

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. 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. 24 28 30 32 34 36 38 40 42 44 48 50 60 truss. Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run.