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Roof Framing

Roof Framing. Unit 33. 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. Roof Framing. Roofs should…….. Protect the home in all types of weather Requires a minimum amount of maintenance

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Roof Framing

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  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

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