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� OSTP Pressure Distribution - <br /> MinnesotaPollution Desi n Worksheet UNIVERSITY � <br /> Control A enc � OF MINNESOTA `�,,,� <br /> Project ID: v 07.14.15 <br /> 1. Media Bed Width: �� ft <br /> 2. Minimum Number of Laterals in system/zone = Rounded up number of [(Media Bed Width - 4) = 3] + 1. <br /> ( 10 - 4 ) + 1 = �laterals Does not apply to at-grades <br /> 3. Designer Selected Number of Laterals: C�laterals <br /> Cannot be less than (ine 2 (accept in at-�rades) - <br /> 4. Select Perforation Spacing 3.0 ft � � � � � �� •••��T�w�- • __ �Y_ � <br /> �.�I�vn��un��t�n�.rl�'n�rn�� I�)'o1��rM j�• <br /> 5. Select Perforation Diameter Size: 7/32 in _ ,. �„�.. <br /> - n.�w.,,.�,.,,.,,. �.,�.,,�.,,�,K,,. �, <br /> 6. Length of Laterols = Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation can not be closer then 1 foot from edge. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Latera(s by the Perforation Spacing <br /> and round down to the nearest whole number. <br /> Number of Perforation Spaces 61 ft : ��ft = 20 Spaces <br /> Number of Perforations per Latera( 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 Latera( = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> �n Mirnber of Fprfanbons Pet t�ter�l bo Guir�r�tee<10li Di�ciyrre V�ri�tian <br /> /4 P on�ns 7/32 Inch Perforations <br /> Perforation Sp�cing(Feet) �F)iarneter(lnches3 Perforation Spari� Pipe Oi�rneter(b►ct�e�sl <br /> 1 11i 1v� 1 3 fFeeti t 1K 1vt 2 3 <br /> 2 10 13 1a 30 60 2 /1 16 21 34 6a <br /> 2� 8 12 16 16 54 2Yt 10 14 20 32 64 <br /> 3 E i2 1a 25 52 3 9 14 f9 30 60 <br /> 3/16 Mch Perforations t!8 Inch Perforatio�s <br /> Perfontion Spxing IFertl �Di�rt�eter(Inches) Perforation Spicin9 Pipe Di�metef(Inches) <br /> 1 11i 1v� 1 3 IFeet) 1 11i t�t 1 3 <br /> 2 12 ts 16 �6 aJ 2 21 33 M 7� 149 <br /> Z� �2 �� 24 �0 d0 2�i 20 30 41 69 135 <br /> 3 12 16 22 37 15 3 20 29 38 M 12E <br /> 9• Total Number of Perforotions equals the Number of Perforations per Latera! multiplied by the Number of <br /> Perforated Laterals. <br /> 21 Perf. Per Lat. X �3 �Number of Perf. Lat. = 63 Total Number of Pert. <br /> 10. Select Type of Manifo(d Connection (End or Center): 0 end ❑ center <br /> 11. Se(ect Latera( Diameter (See Toble): 2.00 in <br />