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4STP Pressure Distribution <br /> Desi n Worksheet UNIVERSITY '�, _ <br /> Minnesota Pollution �. <br /> Control Agency � OF MINNESOTA �-"�\_" <br /> ProjectlD: v 06.12.13 <br /> 1. Media Bed Width: �� ft <br /> 2. Minimum Number of Laterals in system/zone= Rouded up number of [(Media Bed Width - 4) : 3] + 1. <br /> ( 10 - 4 ) + 1 = C�laterals Does not opply to at-grades <br /> 3. Designer Selected Number of Laterais: �__J laterals <br /> Cannot be (ess than line 2 (accept in at-¢radesJ <br /> 4. Setect Perforation Spacing: 3.0 ft -� �` <br /> , ,,,` �' I <br /> 5. Select Perforation Diameter Size: 1/4 in — �- - - <br /> -___ ._ _ __ __ �� _ <br /> 6. Length of Laterols =Media Bed Length - 2 Feet. <br /> 41 - 2ft = 39 ft Perforation can not be closer then 1 foot from edge. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Loterals by the Perforation 5pacing <br /> and round down to the nearest whole number. <br /> Number of Perforation Spoces 39 ft .- �ft = 13 Spaces <br /> Number of Perforations per Lotero( is equal to 1.0 plus the Number of Perforotion Spoces. Check table <br /> 8. below to verify the number of perforations per lateral guarantees tess than a 10%discharge variation. The <br /> value is double with a center manifold. <br /> Perforations Per Laterol = 13 Spaces + 1 = 14 Perfs. Per Lateral <br /> Maximu�Nurnber of Peaforatians Per Latera!to Guarantee�105a Discharge Varatia� <br /> �i��Fc�torabo�<. 7r32 inch Perforatia�s <br /> �ip�Diarne?er�Irxhesl Perforation Sparinc Pipe Cra�neter(lnches) <br /> Pe�forar�on 5paang IFeet) <br /> t �t: �t, � 3 (Feeti 1 tr � ti". 2 3 <br /> 2 tis 13 16 30 6q 2 1! td 2t 34 68 <br /> 2%: 8 tI Ib 28 54 ��: 1Q t� 7L� 3i 64 <br /> 3 8 12 tb 25 52 's 9 1� 19 34 b0 <br /> 3 161rr_h Fertora:ic�ns 1'E Inch Pe�iotata�s <br /> Fipe[hame',er(l;xhez) Pe�foratio�SpacinQ Pipe Pameter ilnches� <br /> P�rforatan Spacinq Ifeetl - <br /> 1 tY: 1�. 2 3 iFEetl I t�:� 1�� 2 3 <br /> 2 12 1E 25 �6 67 1 21 33 44 74 14f <br /> ��: 12 17 i4 40 60 2�_ 20 30 �t1 59 135 <br /> 3 12 16 2t 37 75 3 20 19 38 64 12E <br /> 9• Tota(Number of Perforotions equals the Number of Perforotions per Latero( multiplied by the Number of <br /> Perforated Laterals. <br /> 14 Perf. Per Lat. X �Number of Perf. Lat. = 42 Total Number of Perf. <br /> 10. Setect Type of Manifo(d Connection (End or Center): � end I� Center <br /> 11. Select Latera( Diameter(See TobCe): 2.00 in <br />