3 This Slide Show is to be used to explain the methods of Directly Developing the bevels required for aHIP AND VALLEY ROOFStudents are to complete their own drawings as the facilitator progresses through the show
4 Step 1. Having previously Step 1. Having previously obtained your Plumb Bevel from a Pitch Board Setout. Start 100mm from one end and mark the Plumb Bevel100mmEdge‘T’1.Face1. Plumb Bevel Common Rafter
5 Step 2. Transfer the thickness of the. timber to parallel the Plumb Step 2. Transfer the thickness of the timber to parallel the Plumb BevelStep 3. Mark a line at 90o to the Plumb Line.Edge‘T’2.Face‘T’2. Level Bevel Common RafterNOTE: This triangle is in proportional to the rise per metre run of the roofThe thickness of the piece of timber represents the run or half span of the roof.
6 Step 4. Mark a line square across the. thickness of the timber from Step 4. Mark a line square across the thickness of the timber from the point of the Level Bevel Common RafterStep 5. Join the end of this line back to the point of the Plumb Bevel Common Rafter to form a Right- angle triangle½ Span4.Edge‘T’3.Face3. Edge Bevel Creeper4. Edge Bevel Purlin
7 Step 8. Join this intersection point to the top of the Rise Step 6. Extend the ½ Span line at 90o to the rise on the opposite side of the Common RafterStep 7. Transfer the length of the Hypotenuse of the Edge Bevel Creeper and Purlin triangleEdge‘T’5.6.FacePlan Length HipStep 8. Join this intersection point to the top of the Rise5. Plumb Bevel Hip6. Level Bevel Hip
8 Step 9. Transfer the Plumb Bevel Hip to the other end of the timber by setting a sliding Bevel to the Plumb bevel Hip.EdgeFace
9 Step 10. As for Step 2 transfer the thickness parrel to the Plumb Bevel and create a Right-angled triangle starting at the intersection of the edge with the thickness.Edge‘T’Face‘T’
10 Step 11. Mark a line square across the thickness of the timber from the point of the Level Bevel Hip Step 12. Join the end of this line back to the point of the Plumb Bevel Hip to form a Right- angle triangleEdge7.Face7. Edge Bevel Hip
11 Step 13. Select a point along the True Length Common Rafter and mark a line down the face at 90o from the edgeStep 14. Mark another line at 90o across the edgeStep 15. Transfer the length of this line down onto the True Length Common Rafter and connect back to the intersection on the Plumb CutEdgeFace
12 The Face Bevel will be formed in the top corner of the triangle where it intersects with the True Length Common RafterEdge8.Face8. Face Bevel Purlin
13 An alternative practical method to obtain the Face bevel Purlin is to cut through the Plumb and Edge cut for the creeper, then cut off the point square across the edge and face. The shape formed will provide the Face Bevel Purlin in the top corner
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