Presentation 22:

1. Presentation 22: HIP RIDGE THEORY AND LENGTHENING

2. 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

3. Hip Ridge Length If a building is 28′ x 64′, the ridgeboard is … Building Length 64 – 28 = 36′ Hip Hip Building Width Ridgeboard Hip Hip Plan View

4. 45° 45° Hip Ridge Length This works because hip run is at a 45° angle with common run. Therefore the common runs are equal.

5. 45° 45° Hip Ridge Length Thus adding two of them will equal the Building Width.

6. 45° 45° Hip Ridge Length Thus adding two of them will equal the Building Width.

7. 45° 45° Hip Ridge Length Thus adding two of them will equal the Building Width. Length minus Width equals Ridge Length.

8. Hip Common Common Ridge Common Hip Framing Methods There are two styles of framing hips at the ridge. Hip Common Common Hip

9. Hip Common Common Ridge Common Hip Framing Methods One where a common rafter butts the ridge. Another with no common abutting the ridge. Hip Common Common Hip

10. Theoretical Length Actual Ridge Length The subtraction that yields the ridge length is theoretical. Actual length is longer The amount of lengthening depends on framing style

11. ¾″ Actual Ridge Length ¾″ longer when a common rafter butts the ridge. 1 13/16″ longer when no common rafter exists.

12. 1 1/16″ ¾″ ¾″ Actual Ridge Length ¾″ longer when a common rafter butts the ridge. 1 13/16″ longer when no common rafter exists. A total of 1 13/16″

13. 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.