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OSTP Pressure Distribution <br /> ��^n�ata��Eut�^ Desi n Worksheet �NIVERSITY � 4 <br /> Controi Agency � OF MYNNESOTA '�..� <br /> 12. Catcutate the Squvre Feet per Perforution. Recommended value is 4-11 ft 2 per perforvtion. <br /> Does not apply to At-Grades <br /> a, Bed Area = Bed Width (ft) X Bed Length (ft) <br /> 20 ft X 32 ft = 640 {�2 <br /> b. Square Font per Perforatfon = Bed Area divided by the Tota!Number of Perforatfons. <br /> 640 ft2 + b6 perforations = 9.7 ft2/perforations <br /> 13. Select Minimum Averctge Head: 1.� ft <br /> 14. Select Perforqrion Dlscharge (GPM) based on Table: 0.56 GPM per Perforation <br /> 15. Determine required Flow Rate by muttiplying the TotQl Number of Perfs. by the Perforation 03schQrge. <br /> 66 Perfs X 0.56 GPM per Perforation = 38 GPM <br /> 76. Volume of Lfquid Per Foot of Distr3bution Pi'ping(TQble I!): 0.170 Gallons/ft <br /> �7, Volume of Distribution Piping = <br /> Table ii <br /> =jNumber of Perforated LQtera/s X Length of Loterals X (Volume of Volume of Liquid in <br /> Liquid Per Foot of Distribution Piping] Pipe <br /> � �� � �� �PQ Liqt�id <br /> 6 X 30 ft X 0.170 gaUft = 30.6 Gallons �ameter Per Foot <br /> (inches) (Galbns) <br /> 18. Minimum Delivered Yolume=Votume of Distribution Piping X 4 � 0.045 <br /> 9.25 0.078 <br /> 30.6 gals X 4 = 122.4 Gallons 1.s o.110 <br /> 2 0.170 <br /> Pe� 3 0.380 <br /> � 4 0.661 <br /> � . .....- --- <br /> � � ��� -c�� - -- -- <br /> r� �� <br /> i <br /> i� <br /> n�� �' �fl��p�\' <br /> � � <br /> / � <br /> t �• � 1 <br /> � <br /> S�MII���AbO� <br /> D� � . �� ~` �AkMlitllOGiiWI <br /> {1��ip!if01lI�plNilp <br /> �1 <br /> Comments/Special DeSign Considerafions: <br />