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Pressure Distribution <br />Design Worksheet <br />9. <br />Perf. Per Lat. X Number of Perf. Lat. = Total Number of Perf. <br />10.ft <br />11. Select Type of Manifold Connection (End or Center): <br />12.Select Lateral Diameter (See Table):in <br />13.Calculate the Square Feet per Perforation. <br />Recommended value is 4-11 ft2 per perforation, Does not apply to At-Grades <br />a. Bed Area = Bed Width (ft) X Bed Length (ft) <br />ft X ft = 500 ft2 <br />b.Square Foot per Perforation = Bed Area ÷ by the Total Number of Perfs <br />ft2 ÷ perf =ft2/perf <br />14. Select Minimum Average Head :ft <br />15. Select Perforation Discharge based on Table: GPM per Perf <br />16. <br />Perfs X GPM per Perforation = GPM <br />17.Volume of Liquid Per Foot of Distribution Piping (Table II): Gallons/ft <br />18.Volume of Distribution Piping = <br />X ft X gal/ft = Gallons <br />19. Minimum Delivered Volume = Volume of Distribution Piping X 4 <br />Gallons <br />Comments/Special Design Considerations: <br />0.110 <br />500 <br />51 0.41 22 <br />gals X 4 = <br />= [Number of Perforated Laterals X Length of Laterals X (Volume of <br />Liquid Per Foot of Distribution Piping] <br />15.8 <br />3 <br />63.4 <br />48 0.110 15.8 <br />3 <br />Flow Rate = Total Number of Perfs X Perforation Discharge. <br />0.41 <br />1.0 <br />9.851 <br />1.50 <br />3.0 <br />17 <br />Total Number of Perforations equals the Number of Perforations per Lateral multiplied by the Number of <br />Perforated Laterals. <br />10 <br />51 <br />50 <br />End <br />Spacing of laterals; Must be greater than 1 foot and no more than 3 feet: