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OSTP Pressure Distribution <br /> MinnesotsPoUutbn Design WorksheetUNIVERSITY <br /> Control Agwicy OF MINNESOTA <br /> Project ID: v 07.14.15 <br /> 1. Media Bed Width: 10 Ift <br /> 2. Minimum Number of Laterals in system/zone= Rounded up number of[(Media Bed Width - 4) + 3] + 1. <br /> ( 10 <br /> -4 ) + l - laterals Does not apply to at-grades <br /> 3. Designer Selected Number of Laterals: laterals <br /> Cannot be less than line 2(accept in at-grades) - <br /> 4. Select Perforation Spacing: 3 0 <br /> 5. Select Perforation Diameter Size: 7/32 in «..� <br /> 6. Length of Laterals =Media Bed Length - 2 Feet. <br /> 63 - 2ft 61 ft Perforation can not be closer then 1 foot from edge. <br /> 7 Determine the Number of Perforation Spaces. Divide the Length of Laterals by the Perforation Spacing <br /> and round down to the nearest whole number. <br /> Number of Perforation Spaces j 61 ft + ft = 20 Spaces <br /> Number of Perforations per Lateral is equal to 1.0 plus the Number of Perforation Spaces. Check table <br /> 8. below to verify the number of perforations per lateral guarantees less than a 10%discharge variation. The <br /> value is double with a center manifold. <br /> Perforations Per Lateral =E=Spaces + 1 = 21 Perfs. Per Lateral <br /> �M�rtYri�raf�dr�►drsrdl�a�i�:�ra�sMli <br /> 7/32IrA Fe iwWm <br /> ONO Ferie <br /> 1 t 1% 2 3 t1 1 1w t14 2 3 <br /> 2 41 x iib 2 H 16 21 " 34 0 <br /> / 12 16 21 54 2% 10 14 20 32 M <br /> $ i1 12 K 3f >Q, 3 9 14 1! x #0 <br /> 3/16" 1/1 Mid pa Is one <br /> t NO 06WAI r Pohl *K*4 Pipe own*k4w <br /> I to t14 2 3 Ifs) 1 1% 1% 2 3 <br /> 2 10 a a 46 A 2 21 32 44 74 $0 <br /> 2% 12 17 24 40 10 1% 20 30 41 69 135 <br /> 3 In I is I n I v x 3 H 21 3/ 44 121 <br /> 9. Total Number of Perforations equals the Number of Perforations per Lateral multiplied by the Number of <br /> Perforated Laterals. <br /> 21 Perf. Per Lat. X C�Number of Perf. Lat. - 63 Total Number of Perf. <br /> 10. Select Type of Manifold Connection (End or Center): Q End ❑ Center <br /> 11. Select Lateral Diameter(See Table): 2.00 in <br />