Key Notes:
- Rising Purlin Seat Cut Layout.
- Hip Rafter King Post.
- Knee Brace bevel cut layout.
- Shadow Line technique for laying out the intersection of canted roof planes.
- Developing the geometric layout for the plumb cut on the canted rafter tails.
- Developing the geometric layout for the folding roof surface for the seat cuts on the rising purlin.
- Developing the geometric layout for the bevel cut on the end of the rising purlin following the canted hip rafter.
- Developing the geometric layout for the bevel cut for the plumb hip rafter to canted hip rafter.
- Developing the geometric layout for the sloping ridge of the dormer.
- Developing the geometric layout for the folding roof surface plane of the sloping dormer.
- Developing the geometric layout for the jack rafter claws for the plumb hip rafter.
- Developing the geometric layout for the jack rafter claws for the canted hip rafter.
- Developing the geometric layout for the claw of the dormer gable rafter for the two canted hip rafters
- Developing the geometric layout for the jack rafter claws for the second dormer jack rafter that intersects two canted hip rafters.
- The jack rafters on the sloping ridge dormer are at an angle of 90° to the sloping ridge. However, they are canted to the eave line of the dormer profile rafter. The jack rafters Shadow line are also at 90° to the sloping ridge line in plan view. Since the sloping ridge is actually a hip rafter, the jack rafters shadow line is also the line that defines the dihedral angle of the hip rafter.