Hip Roof Rafter Sizing

Column headings refer to live load.

Hip roof rafter sizing. It is always better to have a large rafter rather than be concerned with a sagging roof. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Here the number is 941 86 inches. To do this your best bet is definitely finding a good hip roof construction calculator so that you can work it all out in a timely and simple fashion.

This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. 1 ridge 6050 x 140 x 50. Roof rise this should be calculated from the base of the roof to the highest point of the roof gable the peak. For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

For a good straight fascia add an extra 20 mm or so to the tails of all your rafters total length. Structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. Hold the tape measure across the width of the timber and keeping the zero end in place pivot the other end of the tape round until the 8 inch mark meets the timber. Length l in feet is shown at right.

This is based on an article in the journal of light construction. Hip and valley rafter sizing. Here the number is 1166 66 inches. Now mark 2 inches onto the timber which is a 1 4 of 8 alternatively if metric hold 200mm across and mark where 50mm falls.

This chart is for initial rough sizing hip and valley rafters work should be checked by an engineer before plans are finalized. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. The hip end jacks tab displays a dimensioned side view and top view of the hip roof jack rafters for the hip end side of the hip rafter on an irregular hip roof. Rafter run outer wall this should be measured starting from the center of the roof span and then extending to the very edge of the exterior wall.