1. Roof Bevels for Oblique Hip and Skew Gable

2. Skew Gabled and Oblique Hipped Roof.
This Slide Show is to be used to explain the methods of Geometrically Developing the bevels required for a
Skew Gabled and Oblique Hipped Roof.
Students are to complete their own drawings as the facilitator progresses through the show

3. Identification of Main Aspects

4. Identification of Main Aspects
Plan Short Hip

5. Identification of Main Aspects

6. Development of Bevels Bevels for rafters and Creepers

7. Section
1.Draw Section
Plan View

8. Plumb Bevel Common Rafter
Level Bevel Common Rafter

9. 3.Edge Bevel Creeper to Gable Rafter
Connect the 2 points
L.L.1
Measure up L..L.1 at 90o to top cord of section
Develop it up to top cord of section
L.L.1
Draw a Creeper in Plan View in any Position along Gable Rafter

10. 4.Edge Bevel Creeper to Long Hip
Connect the 2 points
4.Edge Bevel Creeper to Long Hip
LL2
Measure up L..L.2 at 90o to top cord of section
Develop it up to top cord of section
LL2
Draw a Creeper in Plan View in any Position along Long Hip

11. 5. Edge Bevel Creeper to Short Hip
Connect the 2 points
L.L.3
Measure up L..L.3 at 90o to top cord of section
5. Edge Bevel Creeper to Short Hip
Develop it up to top cord of section
L.L.3
Draw a Creeper in Plan View in any Position along Short Hip

12. 6.Edge bevel Crown end Rafter
Connect the 2 points
Measure up L..L.4 at 90o to top cord of section
6.Edge bevel Crown end Rafter
Develop it up to top cord of section
Using you compass transfer the length on the Crown End rafter on to the Centring rafter
Develop a line, in any position, at 90o to the Crown End Rafter and extend it to the Centring rafter This will become L.L.4

13. Bevels for Skew Gable and Backing Angle

14. Develop True Shape of Gable End

15. 7. Plumb Bevel Gable Rafter
8. Level Bevel gable Rafter

16. 9. Edge Bevel Gable Rafter
Connect the 2 points
Measure up L..L.5 at 90o to top cord of section
Extend this line, still at 90o to the Skew Gable up to the top cord of the section
Develop a line 90o to the skew gable to the ridge This will become L.L.5

17. 10. Backing Angle Gable Rafter
Develop a line 90o to the Top Cord and extend to the line of the Skew Gable
Develop a line at 90o to the Skew Gable and extend until it intersects with the outside of the plan View
Using your compass transfer the length of the first line onto the skew gable
Connect the 2 points

18. Bevels for Hips

19. Rise
11. Plumb Bevel Long Hip
12. Level Bevel Long Hip

20. 13. Edge bevel Long Hip Connect the 2 points
Measure up L..L.6 at 90o to top cord of section
Continue line up to Top Cord true length Hip
Develop a line at 90o to the Long Hip Plan Length and extend to the Crown End Rafter this will become L.L.6

21. Rise
14. Plumb Bevel Short Hip
15. Level Bevel Short
Hip

22. 16. Edge Bevel Short Hip Connect the 2 points
Measure up L..L.7 at 90o to top cord of section
Continue line up to Top Cord true length Hip
Develop a line at 90o to the Short Hip Plan Length and extend to the Crown End Rafter this will become L.L.7

23. Bevels for Purlins

24. 17. Face Bevel Purlin to Long Hip
Develop a line at 90o to the top cord down to the bottom centre of the section
Using your compass transfer the length of the original line to the bottom cord of the section
From the intersection on the top Cord project the point down until it hits the Long Hip
Then project this point down past the Centring Rafter
From were the first projection meets the Long Hip develop a line parrel to the centring rafter until it meets the second projected line
From this point develop a line back to the Gathering Point
17. Face Bevel Purlin
to Long Hip

25. 18. Edge Bevel Purlin to Long Hip
This Angle is the opposite to Edge Bevel Creeper Long Hip
(Development is as for Bevel 4)

26. 19.Face Bevel Purlin to Gable Rafter Using Development for Bevel 17
From were the first projection meets the Gable develop a line parrel to the centring rafter until it meets the second projected line
From this point develop a line back to the Gathering Point

27. 20. Edge Bevel Purlin to Gable Rafter
This Angle is the opposite to Edge Bevel Creeper to Gable Rafter
(Development is as four bevel 3)

28. 21.Face Bevel Purlin to Short Hip
Develop a line at 90o to the top cord down to the bottom centre of the section
From the intersection on the top Cord project the point down until it hits the Short Hip
Using your compass transfer the length of the original line to the bottom cord of the section
21.Face Bevel Purlin to Short Hip
Then project this point down past the Centring Rafter
From were the first projection meets the Short Hip develop a line parrel to the centring rafter until it meets the second projected line
From this point develop a line back to the Gathering Point

29. 22. Edge Bevel Purlin to Short Hip
This Angle is the opposite to Edge Bevel Creeper to Short Hip
(Development is as four bevel 5)