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� _ OSTP Pressure Distribution ; > }:6,= <br /> • LTNIVERSITY �'t�u ��3 > <br /> Minnesota Pollution Des� n Worksheet �����ti <br /> Control Agency � OF MINNESOTA � ���� 1i'�ti�,' <br /> ProjectlD: v 06.12.13 <br /> 1. Media Bed Width: �p ft <br /> 2. Minimum Number of Laterals in system/zone=Rouded up number of[(Media Bed Width -4) : 3] + 1. <br /> ( 10 -4 ) + 1 = �laterals Does not appfy to at-grades <br /> 3. Designer Selected Number of Latera(s: ��taterats <br /> Cannot be(ess than line 2 (occept in at-Qrades) � ; ,::-- <br /> 4. Select Perforation Spocing: 3.0 ft = , f=Y _ <br /> r�J a•..�wv� \�]'mW�ML 13" <br /> 5. Setect Perforotion Diameter Size: 7/32 �n - n �6-aR.� ' <br /> w.��..,..�,..y..�,�, �.,,4, <br /> 6. Length of Laterafs =Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation can not be c(oser then 1 foot from edge. <br /> � Determine the Number of Perforation Spc►ces. Divide the Len�th of Laterafs by the PerforQtion Spacing <br /> and round down to the nearest whole number. <br /> Number of Perforation Spoces 61 ft : ��ft = 20 Spaces <br /> Number of Perforations per Latera( is equal to 1.0 plus the Number of Perforation Spaces. Check tabte <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 manifotd. <br /> Perforations Per Latero( = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> �.3�Q�it1R1 NiJR15Bf Of F@i'FOr8h8115 Per LaEera!to fsuarantee<10b 6rcharge Uariats'm <br /> �`.Inch Pertora�ons 71311nch Periaraoons <br /> Pe�{orat�n Spacing IF�tI �P�'Dia�:er pnci-�s) Fe�foratiar�Spxina Pipe�:a.�eter(lnches) <br /> t fl� 1�: Z 3 (Feetl i !+� 1t: 2 3 <br /> 2 i0 13 18 3Q b0 2 !1 16 21 34 b8 <br /> 7j� 8 12 16 2E 5-� �� 10 14 20 32 64 <br /> 3 8 f2 15 25 52 3 9 � 14� 19 30 b0 <br /> 3/16 lnc6 Perorations 1!8 Irxh Pe►ferat;o�u <br /> Pipe D'u-me,�r(I.�chesl Parforati��5pacir� Pipe Oia.�ter(inchesl <br /> Fe�fo�et?o�S�t�ng(Feet� 1 1Y 11: 2 3 (���tl t t� 1►9 2 3 <br /> 2 12 t8 2b 46 87 2 2t 33 44 T� 144 <br /> 7�� f2 17 2; 40 80 2�; 20 34 41 69 135 <br /> 3 12 16 22 37 15 3 20 29 38 64 128 <br /> 9• Toto(Number of Perforations equats the Number of Perforations per Latera( muttiptied by the Number of <br /> Perforated Lvtera[s. <br /> 21 Perf. Per Lat. X ��Number of Perf. Lat. = 63 Total Number of Perf. <br /> 10. Select Type of Manifo(d Connection (End o�Center): � End ❑ Center <br /> 11. Select Latera(Orameter(See Table): 2.00 in <br />