Hip And Valley Roof Structure

A hip and valley roof may be part of an irregular structure.

Hip and valley roof structure.

Hip rafterforms a raised area or hip usually extending from the corner of the building diagonally upwards to the ridge. Hip and valley roof framing is no so complex as compared to hip roof framing procedures. Ridge is at the top of the roof where the two sides meet and form an angle. A valley rafterforms a depression in the roof instead of a hip.

On an irregularly shaped structure there may be more than four hips which then may alternate with valleys to form a hip and valley roof. The main structural parts of a roof are ceiling joists ridge board jack rafter hip rafter common rafters creeper rafters raking plates out riggers and noggings or last rafter overhang. Now draw the centerlines for all rectangles that are formed inside. A hip roof on a varied plan h denotes a hip v denotes a valley.

Hip roofs are thus much more resistant to wind damage than gable roofs. The roof beam that extends from the corner of the plate to the ridge along the intersection between the two sides of the roof. Extend from the ridge to the valley rafter. Beams that extend from the corner of the plate to the ridge.

The tables of hip and valley framing angles are given for 23 roof slopes the even inch pitch roof slopes of vertical and horizontal pitch. For each roof slope the pitches of the twelve framing angles are given at even degree positions of the hip or valley as indicated by 51 positions of the locating angle d from 20 to 70. Hip roofs tend to be stronger than gable roofs but there is an increased cost in building a hip roof as it s a more complicated structure that requires more building materials and effort. Like the hip rafter it extends diago nally from the top plate to the ridge.

Here roofs are constructed with an angle of 90 degrees. This type of roof is also called broken back hip and valley roof because the main hips are intconeected by the rafter of gables on one side and the rafter of the valley on the other. This runs down the length of roof. Tie down fixings tie down fixings are used to resist uplift and shear forces lateral loads in floor framing wall framing and roof framing.

While hip roofs are stronger and more wind resistant they can be prone to leaks due to the increased level of joins required so care must be taken to. A hip roof is self bracing requiring less diagonal bracing than a gable roof. First of all you need to design the layout of building. Ridge and ridge vent.

Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.