Roof Rafter Length

The run of the rafter.

Roof rafter length.

The number of rafters needed will be determined by the length of your roof. Enter the value for the roof width outside to outside in feet inches and fraction inches and fraction or use the inches box to enter a value in decimals if that is your preference. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement.

If there is an overhang the rafter overhang is measured in millimetres from outside wall to inside fascia board level across. 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. This calculator helps you make the rafters of the suitable sizes required for your roofing. Once you ve measured the run of a rafter simply look up the right table in the ready reckoner for your roof pitch angle and using the measurements relevant to the span of the wall plates it tells you everything from all the common rafter lengths plumb and seat angles to the length of the hips the jack rafter cuts and several others are covered too.

The length of the rafter. Rafters are commonly spaced about 24 inches 61 cm apart. Conclusions about the roof rafter length calculator. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.

Rafter is the distance between the ridge or hip of the roof to. Contents1 rafter of roof 2 span of roof 3 rise of roof 4 pitch of roof 5 run of roof 6 exmple 1 7 example 2 8 calculate rafter length using angle. The rise of the rafter. Rafter length from roof slope in degrees using metric measurement.

Includes result for hip valley factor slope factor and the roof slope in degrees. Calculate the length of a rafter in metres using the roof slope measured in degrees and the gable wall width in metres. Rafter is a sloping beam usually wood that supports a pitched roof. Before starting the calculation we need to know some technical terms related to a pitched roof.

Step 4 add the measurement for the overhang the eaves on the outside wall to the result obtained in the rafter guide to determine the overall rafter length. Height of the scaffold. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. The layout of your home or building will have a significant impact on the final design and slope of your roof.