The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof.
Framing hip and ridge roof.
If we consider the rectangular shape of most buildings then hip roofs will be constructed with two triangular sides and two trapezoidal sides.
The constituents of a hip roof happen to be the common rafters ridge board jack rafters and hip rafters.
Whereas in the case of square buildings hip roofs are more commonly pointed toward the top portion while forming a pyramid like structure.
Determining the ridge beam height.
The finished ridge beam height z above the top of the wall will be m plus the y height.
If you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam for example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet.
Hip roofs are constructed with four rafters that usually meet on a ridge board that is situated at the middle portion of the roof.
Importantly though you must add the thickness of the ridge back on to that measurement so we can use the same common rafters already measured we ve removed the 50mm purple ridge from above so need to now add 50mm on to the new longer ridge.
Ply sheathing angle and cut set back both sheet orientations sheathing hip cut calculator hip roof ply cut angle diagram 1138 93 ft 35 6 sheets waste 40 sheets.
A hip roof can be termed somewhat more intricate for framing compared to a gable roof.
Hip roof framing hip to common to ridge join diagram.
To calculate the length of a ridge in a hipped roof you simply subtract the width away from the length.
Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun.