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Presentation 26:

Presentation 26:. HIP RAFTER LAYOUT. Hip Rafter Layout Lines. There are many layout lines on a hip rafter. Hip Rafter Layout Lines. These lines are added one line at a time. Hip Layout for Ridge. Draw ridge plumb line. This is not the cut line. Hip Layout for Ridge.

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Presentation 26:

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  1. Presentation 26: HIP RAFTER LAYOUT

  2. Hip Rafter Layout Lines • There are many layout lines on a hip rafter.

  3. Hip Rafter Layout Lines • These lines are added one line at a time.

  4. Hip Layout for Ridge • Draw ridge plumb line. • This is not the cut line.

  5. 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.

  6. 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.

  7. Hip Rafter Length • Unit Length x Run = Rafter Length

  8. 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″

  9. Hip Rafter Length 216″ • Rafter Length = • Measured from first ridge plumb line.

  10. Bird’s Mouth Layout 216″ • Draw heel plumb line. • Measure down equal to common rafter bird’s mouth height. • Draw seat cut line.

  11. Bird’s Mouth Layout • Measure back along seat line ½ hip thickness. • Measure down plumb to the bottom edge of rafter. Usually 3/4″

  12. Same Bird’s 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.

  13. 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

  14. Same Usually 3/4″ Hip Tail Layout • Raise level line same as bird’s mouth seat line. • Measure back from plumb line ½ hip thickness. • Draw angled lines on top. Usually3/4″ • Red lines are cut lines.

  15. Conclusion • Hip layout lines are added one at a time.

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