14 The quantity in Lt/sec. evacuated by a small channel (PRATIKO 130) can be rised at will installing a gathering ground slanting pipe parallel to the channel, using the side or bottom outlets. When a slanting channel cannot been installed (swimming pools, or interior premises like large kitchens or laundry rooms, sheds used for industrial washings etc.) it is still possible to set up a rational drainage net provided that the water to be evacuated is sufficiently clear without carryingmaterials that when deposited on the bottomof the channel would noticeably reduce the useful section. In this case the dimensioning must be done with the table 2 data from which the capacity of the channels according to lenght of the stretch involved is considered. As far as the connection to the sewerage net is concerned, the same rules apply for the channels laid at a slant. SGN20 SGP20 SGN30 SGP30 SGN40 SGP40 SG45 SGP45 SG55 SGP55 1,6 2,6 3,5 4,0 4,4 SG3050 SGP3050 3,5 SG4050 SGP4050 3,9 CAPACITY OF THE GRIDS FOR CHANNELS TABLE 1 TABLE 2 CAPACITY liter/sec. CAPACITY liter/sec. ITEM 2,7 1,4 2,2 2,5 2,5 3,5 4 CAPACITY OF THE GRIDS FOR WELLS ITEM 3,8 3,1 2,7 2,2 2,6 2,5 1,9 SGR130 GRP130 CGRN130 CGR200 GHC200 CGR30 CGR40 MG40500 MG30500 MG20500 MG13500 GRP200 CGRN20 GHC130 GS13999 2,6 LAYING SOLUTION TO RAISE EVACUATION CAPACITY For a final calculation the values of table 2 concerning non slanting channels added to those of table 3 concerning pipes and their inclination must be considered. capacity in liter/sec. for different channel lenght 2,5m 0,47 0,19 1,24 5,71 13,29 1,02 1,92 2,63 7,06 33,52 48,08 0,99 7,83 0,47 0,47 1,92 1,92 0,38 0,16 1,01 4,66 10,85 0,83 1,57 2,15 5,77 27,37 39,26 0,81 6,39 0,38 0,38 1,57 1,57 0,33 0,13 0,88 4,03 9,40 0,72 1,36 1,86 4,99 23,70 34,00 0,70 5,53 0,33 0,33 1,36 1,36 0,29 0,12 0,79 3,61 8,41 0,64 1,22 1,66 4,47 21,20 30,41 0,63 4,95 0,29 0,29 1,22 1,22 0,93 0,38 2,49 11,43 26,59 2,03 3,84 5,26 14,13 67,03 96,16 1,98 15,65 0,93 0,93 3,84 3,84 0,66 0,27 1,76 8,08 18,80 1,44 2,72 3,72 9,99 47,40 68,00 1,40 11,07 0,66 0,66 2,72 2,72 0,54 0,22 1,44 6,60 15,35 1,17 2,22 3,03 8,16 38,70 55,52 1,15 9,04 0,54 0,54 2,22 2,22 0,27 0,11 0,72 3,30 7,67 0,59 1,11 1,52 4,08 19,35 27,76 0,57 4,52 0,27 0,27 1,11 1,11 0,25 0,10 0,66 3,05 7,10 0,54 1,03 1,40 3,77 17,91 25,70 0,53 4,18 0,25 0,25 1,03 1,03 0,23 0,09 0,62 2,85 6,65 0,51 0,96 1,31 3,53 16,76 24,04 0,50 3,91 0,23 0,23 0,96 0,96 5,0m 7,5m 10m 15m 20m 25m 30m 35m 40m CAPACITY OF CHANNELS FOR FLAT LAYING CPB130PP CPA130PP CSBGSZ10999PP CSBSGR100PP CSAGSZ10999PP CSASGR100PP CSB100 CSB130 CSB200 CSB300 CSB400 CSM100 CSA100 CSA130 CSA200 CSA300 CSA400 DRAINAGE CALCULATIONS AND TECHNICS
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