For example if the roof rises 4 feet and the span is 16 feet twice the run.
Rafter span roof truss span calculator.
Use of manufactured roof trusses can dramatically cut labor costs when framing a gable roof compared to building rafters.
Area span on the flat please enter area span on the flat in foot.
This is based upon the span of the rafter horizontal span not total rafter length live and dead loads.
The lengths and sizes of joists vary depending on the species and quality of the lumber used.
Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.
This calculator is to be used as an estimating tool only.
For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine.
Trusses can be constructed with smaller sized lumber than rafters and often their cost is not significantly higher than normal rafters.
The rafter member will be longer.
Includes result for hip valley factor slope factor and the roof slope in degrees.
This calculator helps you make the rafters of the suitable sizes required for your roofing.
The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions.
Note that this is not the actual length of the rafter.
This calculator is to be used as an estimating tool only.
Span calculator for wood joists and rafters also available for the android os.
Rafter is a sloping beam usually wood that supports a pitched roof.
Also available for the android os.
To size joists and rafters use the maximum span tables for southern yellow pine.
If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.
Click the button to calculate the stock size needed for this job.
Input the rafter span on the flat eave overhang and pitch of the roof.
This rafter span calculator is species specific for douglas fir hemlock etc.
Pitch is the incline of the roof represented as the ratio of rise to the span twice the run.
Input the rafter span on the flat eave overhang and pitch of the roof.
Click the button to calculate the stock size needed for this job.
Use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead length of roof span pitch or angle.
More roof calculators roof truss calculator how to cut rafters.
The truss is a framework consisting of rafters posts and struts which supports your roof.
If you plan to have overhang etc.
