Rainwater collection system
Calculation of rainfall for framing roofs
Input
S : roof surface
S = 40m2
H: rain intensity
H = 75mm/h
It will calculate the amount of water to be collected
V : volume of water to be collected
V = 40 x 75 : 3600 = 0.83 litri/sec
V = 0.83 litri/sec This value will determine the main criterion for choosing the entire collection, from gutters and downspouts and then channel up homes to the sewage collector
TABLE A
Area in square meters Serving Pipe | |||||||||
Pipe | Water level in mm / rain intensity ( H ) | ||||||||
| |||||||||
60 | 90 | 120 | 150 | 180 | 210 | 240 | 270 | 300 | |
80 | 320 | 213 | 160 | 128 | 106 | 91 | 80 | 71 | 64 |
100 | 495 | 330 | 238 | 198 | 165 | 141 | 123 | 110 | 99 |
110 | 545 | 363 | 262 | 218 | 182 | 156 | 136 | 121 | 109 |
125 | 985 | 657 | 492 | 394 | 328 | 281 | 246 | 219 | 197 |
TABLE B
SERVICE AREA in square meters of gutters | | | ||||
Pipe | Tilt tray ( % ) | |||||
| ||||||
0.5% | 1% | 2% | 4% | |||
GRQ | 40 | 55 | 80 | 110 | ||
GR 145 GR 100 GRN 125 | 70 36 64 | 95 50 87 | 135 72 124 | 190 100 174 | ||
GRN133 | 144 | 202 | 288 | 405 |
Selection criteria of collection system
Table A
The choice of diameter and number of pipes to be installed in accordance with the maximum level of water ice on the surface to be evacuated collection reported.
Table B Choice section and tilt system on the surface of the roof gutters reported as
Check gutters and downpipes are compatible results
Gutter assembling
1.Adhesive application
- 1.Cut the profile to the desired length using a normal metal saw and remove rough parts with sandpaper
- 2.Clean the surface to be glued using a detergent for PVC
- 3.Apply the glue using or directly from the tube on the extremity of the gutter and at the joint or stopend cap.
- 4.Join within two minutes and hold in place for a few seconds allowing the glue to set
- 5.After 24 hours test the holdfor the glue.
2.Gasket mounting
- The gasket will be mounted in special designed holes on juntion and sewage joints.
- After you have inserted the head in the loint’s slot,you have to rotate the gutter until the other edge will be fixed in a semicircular slot.
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