Main features shed roof truss design calculator. first off, the shed roof truss design calculator is an extremely basic, direct, and utilitarian design – every single current trademark. the shed roof truss design calculator can go up against different style that when nitty gritty right, can ooze a cutting edge feel.. Our roof rafter calculator tools are handy for calculating the number of rafters needed, rafter length calculator, lineal feet of rafter, board feed in ridge and sub-facia,and the total board feet in the roof. rise and run means that a 6/12 pitch roof has 6" of rise (vertical) for each foot of run (horizontal).. Wood trusses easy designs with arched and straight beams. oak trusses - design and buy online - oak timber structures. steel truss design for custom home 2014 evstudio, architect engineer. pre-built roof trusses, roof truss systems, roof trusses, pre-built. how to successfully order trusses - timberlake trussworks llc..