Civil Engineering Reference
In-Depth Information
8
Roof frame
Roof shapes
The main roof shapes would be the flat roof, dome roof, hip roof, gable roof and skillion
roof. The surface of the hip roof slopes down to external walls at the end as well as the
sides of the building (see Figure 8.1), whereas the gable roof will have a vertical wall that
runs up to the underside of the rafters to the peak of the roof as an extension of the wall
below (see Figure 8.2). Any building may have a combination of gables and hips, which
are then referred to as a gable end or a hip end. The barn style roof has a gable roof, as it
has a vertical wall extending the lower wall up to the underside of the rafters (see Figure
8.3). The distinctive thing about a barn style roof is the change of pitch of the rafter to
give the broken line up the roof. The flat roof and dome roof are self-explanatory. The
Dutch gable roof is shown in Figure 8.4. The skillion roof, also referred to as a shed roof,
is a roof on one plane from the top to the bottom. It is basically like a flat roof only it has
a steeper grade on it (see Figure 8.5).
8.1
Hip roof
8.2
Gable roof
8.3
Barn style roof
