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Understanding Hip Roofs: Calculating Soldier Wall Heights and Dimensions

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This guide explains the principles of hip roof design, focusing on the calculations necessary for determining soldier wall heights and overall dimensions. We analyze a real-world exercise with a span of 8200mm and a pitch of 25°, demonstrating how to compute the rise and wall heights. The importance of similar triangles in these calculations is explained, along with detailed examples. This curated information aids in understanding how roofs fall into corners and how adjustments can be made for standard specifications.

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Understanding Hip Roofs: Calculating Soldier Wall Heights and Dimensions

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  1. Jerkin Head Roof

  2. Examples What happens to the Hip End

  3. Examples What happens to the Hip End

  4. Examples What happens to the Hip End

  5. Examples What happens to the Hip End

  6. Examples What happens to the Hip End

  7. Plan Hips do not go to the corners

  8. Elevation Hips do not go to the corners

  9. Isometric Hips do not go to the corners

  10. Compare Hip End

  11. Height of End Wall

  12. Height of Soldier Wall Common Rafter

  13. Height of Soldier Wall Common Rafter How do we get the wall height?

  14. Height of Soldier Wall .The wall is 1.350 from the edge .Say, the roof is pitched at 22° then the height of the wall will be: = 1.350 x 0.404 = 0.545 m 545 22° 1350

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  27. Real World Exercise Span 8200 Pitch 25° Client Request Soldier Wall to be 1200mm

  28. What do we know Span 8200 Pitch 25° Half Span = Rise =

  29. What do we know Span 8200 Pitch 25° Half Span = 4100mm Rise = Gathering Point ½ Span Back

  30. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 1912 25° 4100 A Section A – A Normal Hip

  31. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 25° 1912 1200 25° 4100 A Section A – A

  32. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 25° 1912 1200 25° 4100 A Section A – A

  33. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 1912-1200 25° 1912 1200 25° 4100 A Section A – A

  34. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 712 25° 1912 1200 25° 4100 A Section A – A

  35. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 A 712 25° x 1912 1200 25° 4100 A Section A – A

  36. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 These Triangle are similar 712 25° x 1912 1200 25° 4100 Section A – A

  37. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 These Triangle are similar. RULE – In Similar triangles the RATIO between the sides are the same 712 25° x 1912 1200 25° 4100 Section A – A

  38. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 x = 4100 712 1912 Always put the required answer on top 712 25° x 1912 1200 Corresponding Side 25° 4100 Section A – A

  39. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 x = 4100 x 712 1912 x = 2919200 1912 x = 1527 712 25° 1527 1912 1200 25° 4100 Section A – A

  40. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 x = 4100 x 712 1912 x = 2919200 1912 x = 1527 y = 4100 – 1527 y = 2573 712 25° 1527 2573 1912 1200 25° 4100 Section A – A

  41. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 OPTION B x =712 ÷ tan 25˚ x = 1527 y = 4100 – 1527 y = 2573 712 25° x y 1912 1200 25° 4100 Section A – A

  42. Real World Exercise Span 8200 Pitch 25° Half Span = 4100mm Rise = 1912 Thes A 712 25° 1912 1200 25° 4100 A Section A – A

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