1. Roof Framing
Unit 33

2. Roof Framing Roof Styles Gable roof with dormer Gable Hip
Gable and Valley
Gambrel
Hip and Valley
Shed or Lean-to
Flat
Mansard
Dutch Hip

3. Roof Framing Roofs should…….. Protect the home in all types of weather
Requires a minimum amount of maintenance
Be strong enough to bear the load of snow and wind
Be anchored to exterior walls

4. Roof Framing Architectural Design
Has a great relationship with roof styles

5. Roof Framing Components
Ridge Board
Horizontal member that connects the upper ends of the rafters
Common Rafter
Extends from the top plate to the ridge board
Valley Rafter
Extends diagonally from the top plate to the ridge board along lines where two roofs intersect

6. Roof Framing Components
Hip Rafter
Extends diagonally from the corners of the top plate to the ridge board
Hip jack and Valley jack rafters
Never extends the full distance from the top plate to the ridge board

7. Roof Framing Terminology
Overhang
Also called the tail of the rafter
Slope
Incline of the roof
Pitch
Steepness of the roof
Span
Distance between outside edge of the top plates

8. Roof Framing Terminology
Unit of Run
Equal to One Foot or 12”
Cut of a roof (Slope)
The rise in inches and the unit of run (12”)
Measuring line
Imaginary line that runs lengthwise from the outside wall to the ridge
Unit Rise
Number of inches the roof rises per foot of run

9. Roof Framing Terminology
Total Run
Half the distance of the span
Total Rise
Vertical distance from the top of the top plate to the upper end of the measuring line
Plumb line
Line that runs vertical to a rafter
Level line
Line that runs level with a rafter

10. Roof Framing General Knowledge
Joists support the floor like rafters support the roof
Carpenter should have a roof frame plan to know what kind of rafters are needed to frame the roof
Exact number of rafters can be determined from the scale drawing