How To Do A Cut And Pitched Roof

By knowing the span of the roof and the pitch the pitch is the angle at which the rafters rise we can work out the length of the rafters.

How to do a cut and pitched roof.

The pitch of a roof is its vertical rise divided by its horizontal span and is a measure of its steepness. After you decide to build a pitched roof you can layout and cut a rafter pattern. A cut roof this is the traditional method of cutting the timber on site and building up the roof using rafters ridge boards joists and purlins etc the exact details being determined by the size of roof size of timbers etc. Roof pitch calculator use this calculator to calculate roof slope roof pitch and common rafter length.

Once you ve marked the lines use your pencil to draw the diagonal length on the rafter. To do this put the rafter back onto the front and rear wall plates and flush up to the rear wall. For the birdsmouth on the rear wall draw a vertical line in red on the rafter using the front of the wall plate as a guide. Pitched roof designing buildings wiki share your construction industry knowledge.

Once the rafter end is cut then birdsmouths can be cut into the rafter to allow it to sit securely onto the wall plates. Pitched roof construction there are two basic methods of pitched roof construction. Next set the framing square on top of the rafter beam and use a pencil to trace the outside edge of the framing square s tongue. Lay a framing square flat on the board near one end so that the horizontal blade aligns with the bottom edge of the board at 12 inches and the vertical blade is aligned at the roof pitch.

Gable end roof construction if the pitched roof is not a lean to but a normal gable roof we have to divide the total roof span by two in order to form two right angle triangles back to back. Easily modify internal walls for doorway cupboards bigger rooms smaller rooms etc. 1 2 the total span is equal to the horizontal span that one rafter will cover. Don t reclad the roof from sheet metal to tiled do reclad the roof from tiled to sheet metal.