Roof Rafter Length

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.

Roof rafter length.

If there is an overhang the rafter overhang is measured in millimetres from outside wall to inside fascia board level across. Calculate the length of a rafter in metres using the roof slope measured in degrees and the gable wall width in metres. Includes result for hip valley factor slope factor and the roof slope in degrees. All roof rafters should be identical so follow the same steps to measure the plumb cut tail cut and birdsmouth cut.

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. 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. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. 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 rise of the rafter. Using this handy online tool you will have an easy way to determine and figure out the specific rafters needed for the unique slope and dimensions of your roof. This calculator helps you make the rafters of the suitable sizes required for your roofing. Rafters are commonly spaced about 24 inches 61 cm apart.

Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. Before starting the calculation we need to know some technical terms related to a pitched roof. Using the appropriate roof pitch table in a rafter cutting guide such as 4 12 determine the length of each rafter based on the correlating measurement shown for 7 feet. Rafter is a sloping beam usually wood that supports a pitched roof.

Conclusions about the roof rafter length calculator. Rafter is the distance between the ridge or hip of the roof to. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. 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.

The run of the rafter. Rafter length from roof slope in degrees using metric measurement. The layout of your home or building will have a significant impact on the final design and slope of your roof. Height of the scaffold.