roof framing unit 33. roof framing roof styles gable roof with dormer gable hip gable and valley...
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Roof FramingRoof FramingUnit 33
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Roof FramingRoof FramingRoof Styles
Gable roof with dormerGableHipGable and ValleyGambrelHip and ValleyShed or Lean-toFlatMansardDutch Hip
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Roof FramingRoof FramingRoofs 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
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Roof FramingRoof FramingArchitectural Design
Has a great relationship with roof styles
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Roof Framing ComponentsRoof Framing ComponentsRidge Board
Horizontal member that connects the upper ends of the rafters
Common RafterExtends from the top plate to the
ridge boardValley Rafter
Extends diagonally from the top plate to the ridge board along lines where two roofs intersect
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Roof Framing ComponentsRoof Framing ComponentsHip Rafter
Extends diagonally from the corners of the top plate to the ridge board
Hip jack and Valley jack raftersNever extends the full distance from
the top plate to the ridge board
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Roof Framing TerminologyRoof Framing TerminologyOverhang
Also called the tail of the rafterSlope
Incline of the roofPitch
Steepness of the roofSpan
Distance between outside edge of the top plates
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Roof Framing TerminologyRoof Framing TerminologyUnit 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 RiseNumber of inches the roof rises per foot of
run
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Roof Framing TerminologyRoof Framing TerminologyTotal Run
Half the distance of the spanTotal Rise
Vertical distance from the top of the top plate to the upper end of the measuring line
Plumb lineLine that runs vertical to a rafter
Level lineLine that runs level with a rafter
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Roof Framing General Roof Framing General KnowledgeKnowledge
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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