Rafter spacing and roof length will be used to determine quantity of rafters needed for your project.
Roof rafters price.
Live loads are not always present.
They are designed at a 4 12 pitch to be spaced 2 foot on center.
These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi.
Examples of live loads are snow wind rain and temporary construction loads.
Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber.
Lumber size width 2x8 2x10 or 2x12 boards will be used to estimate cost of each rafter as well as total cost excluding local sales tax.
25 pound per square foot 6 29 pound per square foot 2 35 pound per square foot 18 40 pound per square foot 20.
Roof truss basics roof trusses are engineered wood alternatives to hand framed rafters.
They support live and dead loads by efficiently transferring the loads to the building walls or supports.