28+ Truss Length Calculator. Estimate the required **size** and **number of roof trusses** based on the roof span and load requirements. It will use the current cost of wooden rafters.

It will use the current cost of wooden rafters. Estimate the required **size** and **number of roof trusses** based on the roof span and load requirements. Enter the **roof span** (in feet) which is the horizontal distance the roof will.







