1 / 22

Estimating Hip Roofs

Estimating Hip Roofs. Estimating Hip Roofs- Rafters. Pitch = 24⁰. Note – Change of Layout of Ceiling Joists to Accommodate Creepers. Determine No of Rafters. 12 500/ 600 = 20.833 = 21 + 1 = 22 Rafters each side = 44. Determine Rafter Length Span = 6900.

kyrene
Télécharger la présentation

Estimating Hip Roofs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Estimating Hip Roofs

  2. Estimating Hip Roofs- Rafters Pitch = 24⁰ Note – Change of Layout of Ceiling Joists to Accommodate Creepers Determine No of Rafters 12 500/ 600 = 20.833 = 21 + 1 = 22 Rafters each side = 44

  3. Determine Rafter Length Span = 6900

  4. Determine Rafter Length Span = 6900 Half Span = 3450

  5. Determine Rafter Length Span = 6900 Half Span = 3450 Run = 3450

  6. Determine Rafter Length Span = 6900 Half Span = 3450 Run = 3450 – 9.5 = 3440.5 Run of Eaves = 600 Total Run = 3450 + 600 = 4050 Total Length =4050/ cos 24 =4433 + offset =4473

  7. Estimating Sheet

  8. Estimating Hip Roof - Ridge Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Ridge 140 x 19 Purlin 90 x 70 F7 Ridge Runs Between Crown End 12.500 -2 x 3600 = 5300 5300 + ½ Rafter Thickness for each hip end 5300 + 45 =5345 mm

  9. Estimating Sheet

  10. Estimating Hip Roof - Purlin Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof Ridge 140 x 19 Purlin 90 x 70 F7 Spacing 2200 centres 1 Row Purlins at Centre Span Deduct ¼ span for every hip 12500 – 1725 – 1725 = 9050 allow 150 for joints = 9200 6900 – 1725 – 1725 = 3450

  11. Estimating Sheet

  12. Estimating Hip Roof – Hip Rafter Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Hip 140 x 19 Ridge 140 x 19 Purlin 90 x 70 F7 Method 1 Hip = √(Rise² + ((Half Span + O/H) x 1.414)² Hip = √(1.803² + ((3450 + 600) x 1.414)² ) Hip = √(3.251 + 32.795) Hip = 6.003 + 0.15 for Plumb Cut Hip = 6.153 Method 2 Hip = √(Total Rafter² + (Half Span + O/H)² Hip = √(4433² + (3450 + 600)² ) Hip = √(19.551 + 16.403) Hip = 6.004 + 0.15 for Plumb Cut Hip = 6.154

  13. Estimating Sheet

  14. Estimating Gable Roof - Struts Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof with Flush Gable & Raking Eaves Ridge 140 x 19 Purlin 90 x 70 F7 Span 2700 Struts are Difficult to Estimate Develop a Best Guest Method Determine No Required 9.050/2700 =3.4= 4= 5 Each Side Determine No Required 3.450/2700 =1.28= 2= 3 Each Side

  15. Estimating Gable Roof - Struts Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof with Flush Gable & Raking Eaves Ridge 140 x 19 Purlin 90 x 70 F7 Span 2700 Length Half Rise x √2 x √2 (3.450/2 x tan24) x 2 0.768 x 2 = 1.536

  16. Estimating Sheet

  17. Estimating Gable Roof – Collar Ties Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof with Flush Gable & Raking Eaves Ridge 140 x 19 Purlin 90 x 70 F7 Span 2700 Collar Ties 90 x 35 Collar Ties on Every 2nd Rafter On top of Purlins Length of Ridge / Rafter Spacing / 2 22/2 = 11+1 @ HALF SPAN 12 @ 3450

  18. Estimating Sheet

  19. Estimating Tile Quantities Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof with Flush Gable & Raking Eaves Ridge 140 x 19 Purlin 90 x 70 F7 Span 2700 Collar Ties 90 x 35 Calculate Roof Area

  20. Determine Rafter Length Span = 6900 Half Span = 3450 Run = 3450 – 9.5 = 3440.5 Run of Eaves = 600 Total Run = 3450 + 600 = 4050 Total Length =4050/ cos 24 =4433 + offset =4473

  21. Estimating Tile Quantities Pitch = 24⁰ Overhang 450 Rafter 90 x 45 F7 600 c to c Tiled Roof with Flush Gable & Raking Eaves Ridge 140 x 19 Purlin 90 x 70 F7 Span 2700 Collar Ties 90 x 35 True Length of Rafter = 4433 Area of Roof = 4433 x (12.800 +2 x 0.45) x 2 = 121.464 x 7 tiles per sqm = 850.249

More Related