In this artile, I will show you how to count the color steel roofing sheet. For those who need to buy color steel roofing sheet to build the house, it will be helpful. Meanwhile for those, who wants to buy color steel roofing sheet machine, those information and basic knowledage is necessary.
First, knowing how to count area of roofing:
Roofing two sides’ illustration:
1. Roofing area=lengthx width
2. Length of color steel roofing sheet=roofing area/0.855(Suppose valid width 0.855 meter per pieces)
3. How many pieces of the roofing sheet=(whole length ÷0.855m)x2
4. Ridge cap quantity= roofing lengt ÷2.4m (ridage cap 2.4 meter per pieces)
5. Sealing strip quantity=( length ÷0.7m)x2 (sealing strip 0.7M per pieces)
6. Stweather strip length= (length÷0.7m)x2 (sealing strip 0.7M per pieces)
7. Special nail: 4PCS/㎡
8. Roofing angle 120 degree
Four sides slop illustration:
1. Estimate roofing area: (A+B+C+D) ×117% (Tilt and loss)
2. Whole length of color steel roofing sheet: roofing area ÷0.855 (roofing sheet valid width 0.855m per piece)
3. Ridage cap quantity: (a×2+b+c×2)÷0.7 (suppose ridge cap length is 2 meter per piece)
4. Sealing strip quantity=( length ÷0.7m)x2 (sealing strip 0.7M per pieces)
5. Special nail: 4PCS/㎡
6. A part area: 【( b+length )xslop length 】÷2
7. B area is same like A.
8. C area=(widthxslop length ) ÷2
9. Same like C area.
Preparation work before install color steel roofing sheet:
1. Bule dotted line and orange dotted line are skeleton of landscape & lengthways.
2. a distance 50 CM is best
3. b distance 50 to 70 CM is best
Two-side slop drawing:
1. Choose the skeleton material, no matter for wood or steel, this is okay.
2. Installtion surface needs to be very flat.
3. If the skeleton material is wood, please use 45MM×45MM or above. If the skeleton material is steel, please choose 40MM×40MM or above.
4. The skeleton distance should be kept bewteen 50CM～70CM, in the transverse direction, it must be 25 times. And it should be smalled than 50CM.
How to step the roofing sheet correctly?
Overlap stype, the length is smalles than ≦15M
Counterchange style, the length is smaller than ≦15M
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