Roof Framing Valley Rafter

The valley rafter tie beams and joists will move the weight of the roof to the walls.

Roof framing valley rafter.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Set it so that the 8 inch 20 cm mark on the body of the framing square intersects the line for the tail cut. Now you can nail the rafters to the ridge beam. Position the body of the framing square on the rafter.

Start by cutting the angles of the rafter s tail ends as well as the vertical cuts that are needed at the rafter tails. A hip rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. Valley rafter a no math approach to valley plates whether you re tying in new gable dormers or adding a chimney cricket during roof framing giving the valley jacks a place to land is an easy task with these step by step instructions. A valley rafterforms a depression in the roof instead of a hip.

Like the hip rafter it extends diago nally from the top plate to the ridge. Rafter layout with a framing square this example is for a roof with an 8 12 pitch position the square at the end of the rafter board with the tongue on your left and facing away from you. Position the square with both the 8 inch on the outside edge of the tongue and the 12 inch on the blade on the upper edge of the board. Keeping all of the crowns pointing up prevents waves from marring the finished roof.

Because most framing lumber is not perfectly straight i check each piece and mark the crown before i start cutting the lumber into rafters. Use the body long side of the framing square. Rotate it 180 from how you ve been using it so the right angle is pointing up. However since there is some load transfer with these members the code requires a nominal 2 thickness and bracing to a load bearing partition at the upper end or to be designed as a beam with proper supports.