HIP RAFTER LAYOUT

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Presentation 26

• HIP RAFTER LAYOUT

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Hip Rafter Layout Lines

• There are many layout lines on a hip rafter.

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Hip Rafter Layout Lines

• These lines are added one line at a time.

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Hip Layout for Ridge

• Draw ridge plumb line.

• This is not the cut line.

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Hip Layout for Ridge

• Rafter must be shortened for the ridge.

Usually 1 1/16?

• Shortening ½ the diagonal thickness of ridge.

• Draw a square line on the top with a center mark.

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Hip Layout for Ridge

• Side cuts are added for fit.

• Side cut ½ the thickness of hip.

Usually 1 1/16?
Usually 3/4?

• Draw angled line over the top.

• Red lines are the cut lines.

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Hip Rafter Length

• Unit Length x Run Rafter Length

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Hip Rafter Length

• If the building span is 24', then the run is
  _____.

12

• If the unit rise is 6?, the hip unit length is
  ______.

18?

• The hip rafter line length is

12 units of run x 18? 216?
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Hip Rafter Length
216?

• Rafter Length

• Measured from first ridge plumb line.

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Birds Mouth Layout
216?

• Draw heel plumb line.

• Measure down equal to common rafter birds mouth
  height.

• Draw seat cut line.

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Birds Mouth Layout

• Measure back along seat line ½ hip thickness.

• Measure down plumb to the bottom edge of rafter.

Usually 3/4?
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Birds Mouth Layout

• Measure back along seat line ½ hip thickness.

• Measure down plumb to the bottom edge of rafter.

• Raise seat line this distance.

Usually 3/4?

• Red lines are cut lines.

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Hip Tail Layout

• Determine the location of hip fascia plumb line

• Either measure the run

• Or measure the length

• Measure down the plumb line same as the common
  rafter

• Draw level line

• Square over the top with a center mark

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Hip Tail Layout

• Raise level line same as birds mouth seat line.

• Measure back from plumb line ½ hip thickness.

• Draw angled lines on top.

Usually 3/4?

• Red lines are cut lines.

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Conclusion

• Hip layout lines are added one at a time.