Roof Bevels for Oblique Hip and Skew Gable

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

Identification of Main Aspects

Identification of Main Aspects Plan Short Hip

Identification of Main Aspects

Development of Bevels Bevels for rafters and Creepers

Section 1.Draw Section Plan View

Plumb Bevel Common Rafter Level Bevel Common Rafter

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

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

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

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

Bevels for Skew Gable and Backing Angle

Develop True Shape of Gable End

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

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

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

Bevels for Hips

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

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

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

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

Bevels for Purlins

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

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

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

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)

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

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)