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� <br /> aSTP Pressure Distributivn P <br /> �, _. <br /> Mir�nesota�Poliution Q�SS�d� W�rk�l i�'�� UNIVERSITY � � <br /> Cantral Agenty 5 OF MINI+tESOTA �`�,' <br /> PrajectlD: 15-0490 v Ob.1Z.13 <br /> 1. Media Bed Width; �� ft <br /> 2. Mintmum Number af Laterals in system/zone = Rouded up number of[(Media Bed Width -4)= 3] + 1. <br /> ( 10 -4 ) + 1 = ��taterals Does not apply Co at-grades <br /> 3. Desi�ner Selected Number of tatera(s: ��taterals <br /> Cannot be less than (ine 2 (acrept rn vt-Qrades) .., ,�,_,r,,.,. <br /> 4. Seleet�rforation Spcuing: 3.0 ft ' ��� '� <br /> w _�� �-> ��., �.- <br /> 5. Select Perforaxfon DiQmeter Sfze; 1/4 in ""'�"��-��--� M. �"- _ � _ _�. <br /> �.t.e. n�k:n R..� n.t... <br /> 6. Length of Laterals =Media Bed Length - 2 Feet. <br /> 75 - 2ft - 73 ft Perforvtion can not be ctoser then 1 foot from edqe. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Laterals by the Perforatian Spacing <br /> and round down to the nearest whote number. <br /> Number of Perforation Spnces 73 ft : �ft = 24 Spaces <br /> Number of Perforations per Laterdi is equal to 1.0 plus the Number vf Perfnration Spaces. Check table <br /> 8. below to verify the �umber of p�rforations per taCerat guarantees less than a 10%discharge variation. The <br /> va(ue is double with a center manifotd. <br /> Perforatrons Per Latero! = 24 Spaces + 1 = 25 pe�fs. Per Laterat <br /> l�ia�n Nwr�r of P�rfarati4ns Pea�L�terat ta�ar�ntee�fti9�D�ctavge Y��tn <br /> � ��inc Pt�rt�a�ans � 71�2 ln�h P�rforaGons <br /> RE=furat�n SFarng ifeet} Ripe Diamet�r(Inctte�) PerforaCian 5pacit� Pipe Uiameter(lnciyes) <br /> i 1�: 1�2 2 3 iF�21 1 i?�: 1�" 2 3 <br /> 7 �0 13 18 34 f� 2 1t ib 2i 34 b8 <br /> 2�2 � t2 tb 28 54 2� 1� 1� Z4 3� da <br /> � 8 t2 16 �5 52 3 9 i4 !9 "s0 64 <br /> 3'16 lrtich P�t#uratians 118 IrKt�Perfarations <br /> Pipe�iameter(lnchesl PerforaQon S��:irg Fipe Diarne#er(Inchesl <br /> Pe�f�iratwn 5pacing IF�t) <br /> i 1Y+ 1�: 2 3 f�c�e:} 1 t� 1h 2 3 � <br /> 2 12 18 26 �6 � 81 3 Z1 � 33 � l� 444 <br /> rS= 92 17 t�i 4l1 8� 2�� 3U 34 � 4�1 �9 � i35 <br /> � i2 16 2x 3T 7� 3 24 24 � 38 b� 128 <br /> 9� TotQt Number of Perforations equals the Number of Perforations per�aterat muttipkied by the Number of <br /> Perforated Laterals. <br /> 25 Perf. Per Lat. X �Number af Perf. Lat. = 75 Totat Number of Perf. <br /> 10. Setect Type of Monifa(d Connection (End or Center): [J] End ❑ Center <br /> 11. Setect LnterQl Aiometer (See Tab/e): 2.00 in <br />