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).. Tutorials, calculators, and building codes. calculate the length of lean to shed roof rafters for any common roof pitch when the top of the rafters stop into a wall. it includes the rise and works in feet and inches or metric values. how to calculate a lean to rafter.. For the sturdiest shed, plan on building the platform with treated 2-by-6 posts, 24 inches apart, or standard 2-by-4 studs for a lighter-duty shed. calculate by area and add enough 3/4-inch, cdx plywood to cover the platform. this type of plywood has allowed defects, such as knots and patches, but it's strong and reliable..
You can learn a great deal about roof framing by understanding the concepts of framing a gable or shed roof. these roof types have the basic elements of all of the other roofs and make it a perfect place to begin the discussion. the main elements of the gable roof layout are the ridge beam, common rafters, and wall plate.. The building or shed calculator includes many of the basic equations for building a shed, pole barn or other framed building from bottom to top including the footers, foundation, slab, floors, walls/rooms and roof..
