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*Srongly encourage equal basal areas (but 3' between beds is <br /> minimum) <br /> *Center fed force main will eliminate additional friction loss calc. (if <br /> upper or lower bed is fed 1s`. friction loss must be added) <br /> *Start with upper bed: <br /> **2.5 head at upper bed (table 4 orifice discharge chart) <br /> **Determine the difference in elevation between the upper bed and <br /> lower bed. Add elevation difference to orfice discharge rate. <br /> EXAMPLE: 2.5 head with 3/16" orfice= .66 gpm <br /> Elevation difference between beds = .8' <br /> Interpolate the orfice discharge rate at 3.3' <br /> head=.75gpm <br /> Minimum basal area must be provided. Basal area does not have to be <br /> equal. The soil loading rate for that cell area must be met, and the total basal <br /> area for the GPD discharge must be met. [Example: 600 GPD, beds can be <br /> 8'x45', and 8'x30' (a 60%-40% split)]. Linear loding rate and <12 sq. ft. <br /> per orfice will be the check and balance for the beds. <br /> ADD THE TWO BEDS= GPM PUMP DISCHARGE RATE <br /> REQUIRED <br /> A= U. 10', L 10' B= U 38',L 38' F= 0.83' G= 0.5' II= 1.0' <br /> D= .7' (.7') <br /> E= 1.1' (1.1') E>D+1%SLOPE X Al <br /> K= 8.19' (8.5') K={[(D+E)-2] + F +H) X 3 <br /> J= 5.42' (7') J=(D+F + G)X 3 X UPSLOPE CORRECT. FACTOR <br /> I= 8.02' (9') J=(E+ F +G)X 3 X DOWNSLOPE CORRECT. FACTOR <br /> W= 40' (40') <br /> L= 55' (55') <br />