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ps* <br />V''i. <br />E-17 <br />Head <br />TABLE OF PERFORATIOH DISCHARGES 111 CALLOUS PER MINUTE* <br />Perforation diameter (inches) <br />1/J|9/32 5/16 n/32 <br />1.0"0.56 0.74 0.93 1.15 1.39 1.66 <br />1.5 0.69 0.90 1.14 1.41 1.71 2.03 <br />2.0*^0.80 1.04 1.32 1.63 1.97 2.34 <br />2.5 0.89 1.17 1.47 1.82 2.20 2.62 <br />3.0 0.98 1.28 1 .62 1.99 2.41 2.87 <br />H.O 1.13 1.47 1.07 2.30 2.79 <br />3.31 <br />5.0 1.26 1.65 2.09 2.57 3.12 3.71 <br />•Based on 19.65 Cd^h 1 /2 , where:q = Gpm;C = coefficient of <br />discharge (0.60); d =perforation diameter in inches;h = head in foot <br />^Use 1.0 foot of head for residential systems. <br />'^Use 2.0 feet of head for cluster systems, other establishments, etc. <br />MAXIMUM ALLOWABLE MUHBER OF PERFORATIONS PER LATERAL <br />_ _ _ _ _ _(10 percent discharge variation) _ _ _ _ _ _ _ __ <br />rerroration <br />spacing <br />in feet <br />1-1/4" <br />(1.380") <br />1-1/2" <br />(1.610") <br />2" <br />(2.067") <br />Pe rforntion diameter*5 <br />1/4"5/16" 3/8"1/4"5/16"3/8"1 /4 "5/16"3/8" <br />2.5 14 10 3 18 13 <br />10 28 21 16 <br />3.0 13 9 7 17 12 10 26 19 15 <br />3.3 12 9 7 16 12 9 25 19 14 <br />4.0 11 8 6 15 11 9 23 17 13 <br />5.0 10 8 6 14 10 8 22 16 12 <br />"F" FACTORS FOR A PIPE WITH MULTIPLE OUTLETS <br />Humber of <br />Perforations <br />"F" Factor <br />6 0.432 <br />8 0.409 <br />10 0.396 <br />12 0.387 <br />14 0.380 <br />16 0.376 <br />18 0.372 <br />20 0.370 <br />30 0.360 <br />L...