Roof Rafter Length Table

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.

Roof rafter length table. A common rafter will be 13 42 long per foot of horizontal run on a 6 12 slope roof. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. Use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Rafter length using pitch v r 2 sqrt 1 p 2 where v overhang r roof span p pitch 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.

The length of rafter per meter of run is 1 1543. 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. The difference in length of sequential jack rafters spaced 16 o c. The run of the rafter.

The tail or eave overhang must be added to the rafter length. Includes result for hip valley factor slope factor and the roof slope in degrees. This is the rafter length from the top cut to the seat plumb mark. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.

Height of the scaffold. Rafter length calculator calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. This means that for every 1m the rafter travels horizontally the angled length of the roof will be 1 1543m.

The length of the rafter. 1 1543 x 1 610 1 858m. All we do now is use a calculator to multiply 1 610 by the measurement in the book. A hip or valley rafter will be 18 long per foot of horizontal run on a 6 12 slope roof.

The rise of the rafter. Using the 7 inch rise table and our 15 run the common rafter length is 17 43 8. Will be 17 88 long on a 6 12 slope roof.