presentation 22:
DESCRIPTION
Presentation 22:. HIP RIDGE THEORY AND LENGTHENING. Hip Ridge Length. Hip Ridge Length = Building Length – Building Width. Building Length. Hip. Hip. Hip ridge length is found by subtracting. Building Width. Ridgeboard. Hip. Hip. Plan View. Hip Ridge Length. - PowerPoint PPT PresentationTRANSCRIPT
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Presentation 22:
HIP RIDGE THEORY AND LENGTHENING
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Hip Ridge Length
Plan View
Building Length
Bui
ldin
g W
idth
Ridgeboard
Hip
HipHip
HipHip ridge length is
found by subtracting.
Hip Ridge Length = Building Length – Building Width
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Hip Ridge Length
Plan View
Building Length
Bui
ldin
g W
idth
Ridgeboard
Hip
HipHip
Hip
If a building is 28′ x 64′, the ridgeboard is …
64 – 28 = 36′
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Therefore the common runs are equal.
Hip Ridge Length
This works because hip run is at a 45° angle with common run.
45°45°
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Hip Ridge Length
45°45°
Thus adding two of them will equal the Building Width.
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Hip Ridge Length
45°45°
Thus adding two of them will equal the Building Width.
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Hip Ridge Length
45°45°
Thus adding two of them will equal the Building Width.
Length minus Width equals Ridge Length.
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There are two styles of framing hips at the ridge.
Framing Methods
Ridge
Com
mon
Hip
Hip
Com
mon
Common
Hip
Hip
Com
mon
Com
mon
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One where a common rafter butts the ridge.
Another with no common abutting the ridge.
Framing Methods
Ridge
Com
mon
Hip
Hip
Com
mon
Common
Hip
Hip
Com
mon
Com
mon
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The subtraction that yields the ridge length is theoretical.
Actual Ridge Length
Actual length is longer
Theoretical Length
The amount of lengthening depends on framing style
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¾″ longer when a common rafter butts the ridge.
Actual Ridge Length
¾″
1 13/16″ longer when no common rafter exists.
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¾″ longer when a common rafter butts the ridge.
Actual Ridge Length
¾″
1 13/16″ longer when no common rafter exists.
¾″
1 1/16″
A total of 1 13/16″
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Conclusions
• Theoretical hip ridge length is found by subtracting building width from building length.
• Ridge length is actually longer.
• Add ¾″ when a common rafter butts the ridge.
• Add 1 13/16″ when no common exists.