Rainwater.xls
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Design calculation sheet ( Rain Water Pipe Sizing) Project no:
Date:
22-11-2018 Sheet no.:
1
of
1
Computed by:
Subject:
Checked by:
AL MAHA CENTER FOR CHILDREN AND YOUNG ADULTS
Approved by:
A
x
R
GPM = A L/S =
x x
1406
R 100
x x
0.0104 0.0104
=>
GPM =
0.0
/ /
3600 3600
=>
L/S =
39
R = Rainfall Intensity in ("/hr) in gpm formula or (mm/hr) in metric formula A = Roof Area in (ft2) in gpm formula or (m2) in metric formula Selection :
Leaders Pipe Size 2" 50 3" 82 4" 110 5" 125 6" 150 8" 200 Leaders Pipe Size 2" 50 3" 82 4" 110 5" 125 6" 150 8" 200
Inches 2" 3" 4" 5" 6" 8" 10" 12" 15"
1 2,880 8,880 18,400 34,600 54,000 116,000
25 268 825 1,710 3,216 5,019 10,782
Roof Drain Vertical Leader Requirements for Horizontal Roof Areas at Various Rainfall Rate Hourly Rainfall in Inches 11/2 2 21/2 3 4 Roof Area Sq. Ft. 1,920 1,440 1,150 960 720 5,860 4,400 3,520 2,930 2,200 12,700 9,200 7,360 6,130 4,600 23,050 17,300 13,840 11,530 8,650 36,000 27,000 21,600 18,000 13,500 77,400 58,000 46,400 38,680 29,000 Hourly Rainfall in mm 40 50 65 75 100 Roof Area Sq. mt. 178 134 107 89 67 545 409 327 272 204 1,180 855 684 570 428 2,143 1,608 1,286 1,072 804 3,346 2,510 2,008 1,673 1,255 7,194 5,391 4,313 3,595 2,696 Table 1
Pipe Size mm 50 82 110 125 150 200 250 300 375
No. of Vertical risers required (150mm)
5
6
7
8
575 1,760 3,680 6,920 10,800 23,200
480 1,470 3,070 5,765 9,000 19,315
410 1,260 2,630 4,945 7,715 16,570
360 1,100 2,300 4,325 6,750 14,500
125
150
175
200
53 164 342 643 1,004 2,156
45 137 285 536 837 1,795
38 117 244 460 717 1,540
33 102 214 402 627 1,348
ALLOWABLE FLOW Horizontal Storm Drain Slope per Foot Vertical Leaders 1/8" (1%) 1/4" (2%) 1/2" (4%) GPM L/S GPM L/S GPM L/S GPM L/S 30 2 12 1 17 1 24 2 90 6 36 2 51 3 72 5 192 12 78 5 111 7 157 10 348 22 142 9 201 13 284 18 566 36 231 15 327 21 462 29 1220 77 498 31 705 44 996 63 2200 139 902 57 1275 80 1804 114 1467 92 2076 131 2934 185 2666 168 3774 238 5332 336 Table 2 =
2
AL MAHA - STROM WATER PIPE RISER CALCULATION
As per IFC
As per Calculation
S.NO
Riser Tag
Area (m²)
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
Pipe Dia (mm)
Qty.
1
1,2
530
100
14.72
110
2
110
2
2
3,4,5,6 & 7
900
100
25.00
200
2
200
1
3
8, 9 & 10
300
100
8.33
110
1
100
1
4
11,13,14 & 15
725
100
20.14
110 , 160
1,1
110,160
1,1
5
12 & 16
300
100
8.33
160
1
150
1
6
17
175
100
4.86
110
1
110
1
7
18,19 & 20
600
100
16.67
160
1
150
1
8
21
80
100
2.22
110
1
110
1
9
22 & 23
290
100
8.06
110
1
110
1
10
24 & 25
300
100
8.33
160
1
110
1
11
26,26A,27 & 28
670
100
18.61
110, 160
1,1
110,160
1,1
12
29,29A & 30
590
100
16.39
110,160
1,1
110,160
1,1
13
31,53 & 54
1750
100
48.61
160
2
150
2
14
32
350
100
9.72
160
1
150
1
15
33,34 & 55
480
100
13.33
160
1
150
1
16
35,36,37 & 37A
850
100
23.61
110
3
110
3
17
39,39a,39b,40,41 & 42
1050
100
29.17
110,160
1,2
110,160
1,1
18
43
200
100
5.56
160
1
160
1
19
44,45,46,47 & 47A
850
100
23.61
110 , 160
2,1
110,160
1,1
20
49,49A & 50
600
100
16.67
110 , 160
1,1
110,160
1,1
21
51 & 52
300
100
8.33
160
1
160
1
As per IFC Area (m²)
S.NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1,2 3,4,5,6 & 7 8, 9 & 10 11,13,14 & 15 12 & 16 17 18,19 & 20 21 22 & 23 24 & 25 26,26A,27 & 28 29,29A & 30 31,53 & 54 32 33,34 & 55 35,36,37 & 37A 39,39a,39b,40,41 & 42 43 44,45,46,47 & 47A 49,49A & 50 51 & 52
526.01 893.57 292 719.12 298.95 163.03 588.16 79.51 281.76 298.95 663.4 588.84 1737.25 348.12 475.7 826.41 1037.5 176.71 823 587.31 289.75
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
90 90 90 90 90
13.15 22.34 7.30 17.98 7.47
110 200 110 110 , 160 160 110 160 110 110 160 110, 160 110,160 160 160 160 110 110,160 160 110 , 160 110 , 160 160
2 2 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,2 1 2,1 1,1 1
As per Calculation Pipe Dia (mm)
Qty.
As per IFC S.NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1,2 3,4,5,6 & 7 8, 9 & 10 11,13,14 & 15 12 & 16 17 18,19 & 20 21 22 & 23 24 & 25 26,26A,27 & 28 29,29A & 30 31,53 & 54 32 33,34 & 55 35,36,37 & 37A 39,39a,39b,40,41 & 42 43 44,45,46,47 & 47A 49,49A & 50 51 & 52
Area (m²)
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
530 900 300 725 300 175 600 80 290 300 670 590 1750 350 480 850 1050 200 850 600 300
150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150
22.08 37.50 12.50 30.21 12.50 7.29 25.00 3.33 12.08 12.50 27.92 24.58 72.92 14.58 20.00 35.42 43.75 8.33 35.42 25.00 12.50
110 200 110 110 , 160 160 110 160 110 110 160 110, 160 110,160 160 160 160 110 110,160 160 110 , 160 110 , 160 160
2 2 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,2 1 2,1 1,1 1
As per Calculation Pipe Dia (mm)
Qty.
110
12
550
110 200 100 110,160 150 110 150 110 110 110 110,160 110,160 150 150 150 110 110,160 160 110,160 110,160 160
2 1 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,1 1 1,1 1,1 1
150 200
36 77
900 300 750 300 200 600 100 300 300 700 600 1800 400 500 850 1050 200 850 600 300
Date:
22-11-2018 Sheet no.:
1
of
1
Computed by:
Subject:
Checked by:
AL MAHA CENTER FOR CHILDREN AND YOUNG ADULTS
Approved by:
A
x
R
GPM = A L/S =
x x
1406
R 100
x x
0.0104 0.0104
=>
GPM =
0.0
/ /
3600 3600
=>
L/S =
39
R = Rainfall Intensity in ("/hr) in gpm formula or (mm/hr) in metric formula A = Roof Area in (ft2) in gpm formula or (m2) in metric formula Selection :
Leaders Pipe Size 2" 50 3" 82 4" 110 5" 125 6" 150 8" 200 Leaders Pipe Size 2" 50 3" 82 4" 110 5" 125 6" 150 8" 200
Inches 2" 3" 4" 5" 6" 8" 10" 12" 15"
1 2,880 8,880 18,400 34,600 54,000 116,000
25 268 825 1,710 3,216 5,019 10,782
Roof Drain Vertical Leader Requirements for Horizontal Roof Areas at Various Rainfall Rate Hourly Rainfall in Inches 11/2 2 21/2 3 4 Roof Area Sq. Ft. 1,920 1,440 1,150 960 720 5,860 4,400 3,520 2,930 2,200 12,700 9,200 7,360 6,130 4,600 23,050 17,300 13,840 11,530 8,650 36,000 27,000 21,600 18,000 13,500 77,400 58,000 46,400 38,680 29,000 Hourly Rainfall in mm 40 50 65 75 100 Roof Area Sq. mt. 178 134 107 89 67 545 409 327 272 204 1,180 855 684 570 428 2,143 1,608 1,286 1,072 804 3,346 2,510 2,008 1,673 1,255 7,194 5,391 4,313 3,595 2,696 Table 1
Pipe Size mm 50 82 110 125 150 200 250 300 375
No. of Vertical risers required (150mm)
5
6
7
8
575 1,760 3,680 6,920 10,800 23,200
480 1,470 3,070 5,765 9,000 19,315
410 1,260 2,630 4,945 7,715 16,570
360 1,100 2,300 4,325 6,750 14,500
125
150
175
200
53 164 342 643 1,004 2,156
45 137 285 536 837 1,795
38 117 244 460 717 1,540
33 102 214 402 627 1,348
ALLOWABLE FLOW Horizontal Storm Drain Slope per Foot Vertical Leaders 1/8" (1%) 1/4" (2%) 1/2" (4%) GPM L/S GPM L/S GPM L/S GPM L/S 30 2 12 1 17 1 24 2 90 6 36 2 51 3 72 5 192 12 78 5 111 7 157 10 348 22 142 9 201 13 284 18 566 36 231 15 327 21 462 29 1220 77 498 31 705 44 996 63 2200 139 902 57 1275 80 1804 114 1467 92 2076 131 2934 185 2666 168 3774 238 5332 336 Table 2 =
2
AL MAHA - STROM WATER PIPE RISER CALCULATION
As per IFC
As per Calculation
S.NO
Riser Tag
Area (m²)
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
Pipe Dia (mm)
Qty.
1
1,2
530
100
14.72
110
2
110
2
2
3,4,5,6 & 7
900
100
25.00
200
2
200
1
3
8, 9 & 10
300
100
8.33
110
1
100
1
4
11,13,14 & 15
725
100
20.14
110 , 160
1,1
110,160
1,1
5
12 & 16
300
100
8.33
160
1
150
1
6
17
175
100
4.86
110
1
110
1
7
18,19 & 20
600
100
16.67
160
1
150
1
8
21
80
100
2.22
110
1
110
1
9
22 & 23
290
100
8.06
110
1
110
1
10
24 & 25
300
100
8.33
160
1
110
1
11
26,26A,27 & 28
670
100
18.61
110, 160
1,1
110,160
1,1
12
29,29A & 30
590
100
16.39
110,160
1,1
110,160
1,1
13
31,53 & 54
1750
100
48.61
160
2
150
2
14
32
350
100
9.72
160
1
150
1
15
33,34 & 55
480
100
13.33
160
1
150
1
16
35,36,37 & 37A
850
100
23.61
110
3
110
3
17
39,39a,39b,40,41 & 42
1050
100
29.17
110,160
1,2
110,160
1,1
18
43
200
100
5.56
160
1
160
1
19
44,45,46,47 & 47A
850
100
23.61
110 , 160
2,1
110,160
1,1
20
49,49A & 50
600
100
16.67
110 , 160
1,1
110,160
1,1
21
51 & 52
300
100
8.33
160
1
160
1
As per IFC Area (m²)
S.NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1,2 3,4,5,6 & 7 8, 9 & 10 11,13,14 & 15 12 & 16 17 18,19 & 20 21 22 & 23 24 & 25 26,26A,27 & 28 29,29A & 30 31,53 & 54 32 33,34 & 55 35,36,37 & 37A 39,39a,39b,40,41 & 42 43 44,45,46,47 & 47A 49,49A & 50 51 & 52
526.01 893.57 292 719.12 298.95 163.03 588.16 79.51 281.76 298.95 663.4 588.84 1737.25 348.12 475.7 826.41 1037.5 176.71 823 587.31 289.75
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
90 90 90 90 90
13.15 22.34 7.30 17.98 7.47
110 200 110 110 , 160 160 110 160 110 110 160 110, 160 110,160 160 160 160 110 110,160 160 110 , 160 110 , 160 160
2 2 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,2 1 2,1 1,1 1
As per Calculation Pipe Dia (mm)
Qty.
As per IFC S.NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
1,2 3,4,5,6 & 7 8, 9 & 10 11,13,14 & 15 12 & 16 17 18,19 & 20 21 22 & 23 24 & 25 26,26A,27 & 28 29,29A & 30 31,53 & 54 32 33,34 & 55 35,36,37 & 37A 39,39a,39b,40,41 & 42 43 44,45,46,47 & 47A 49,49A & 50 51 & 52
Area (m²)
Rain Fall Intensity ( R ) (mm/hr)
Flow (LPS)
Pipe Dia (mm)
Qty.
530 900 300 725 300 175 600 80 290 300 670 590 1750 350 480 850 1050 200 850 600 300
150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150
22.08 37.50 12.50 30.21 12.50 7.29 25.00 3.33 12.08 12.50 27.92 24.58 72.92 14.58 20.00 35.42 43.75 8.33 35.42 25.00 12.50
110 200 110 110 , 160 160 110 160 110 110 160 110, 160 110,160 160 160 160 110 110,160 160 110 , 160 110 , 160 160
2 2 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,2 1 2,1 1,1 1
As per Calculation Pipe Dia (mm)
Qty.
110
12
550
110 200 100 110,160 150 110 150 110 110 110 110,160 110,160 150 150 150 110 110,160 160 110,160 110,160 160
2 1 1 1,1 1 1 1 1 1 1 1,1 1,1 2 1 1 3 1,1 1 1,1 1,1 1
150 200
36 77
900 300 750 300 200 600 100 300 300 700 600 1800 400 500 850 1050 200 850 600 300
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