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OSTP Pressure Distribution <br /> Minnesota Pollution Design Worksheet UNIVERSITY <br /> Control Agency OF MINNESOTA `Z,�- <br /> Project ID: v 06.12.13 <br /> 1. Media Bed Width: �� ft <br /> 2. Mini;�nGm Number of Laterals in system/zone = Rouded up number of [(Media Bed Width - 4) = 3] + 1. <br /> (� 10 - 4 ) + � _ ��laterats Does not apply to at-grades <br /> 3. Designer Selected Number of Lotero(s: C_Jlaterals <br /> Cannot be less thnn (irre 2 (accept in at-Qrades) __ <br /> 4. Select Perforation SpQcing 3.0 ft , . ���.�.��`.-;`.M` '_ <br /> M�niimun <br /> �w�l���nlnx��y�.u.vl i'.��n��� 1')•W�a4 '- 1�' <br /> 5. Select Perforation Diometer Size: 7/32 in ,....�.w, " <br /> ����V�� 1h.�ldn�xH�4wxiny]'b�1• <br /> I.rlu�.�1�.����� ��/. <br /> b. �ength or Latera(s = Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation can not be closer then 1 foot from edge. <br /> � Determine ine Number of Perforation Spaces. Divide the Length of Laterals by the Perfororion Spacing <br /> and round down to the nearest whole number. <br /> Numb�r�;'�erforotion Spoces 61 ft = �ft = 20 Spaces <br /> Number of rerforotions per Lotero( is equal to 1.0 plus the Number of Perforation SpQces. Check table <br /> 8. betow to verify the number of perforations per lateral guarantees less than a 10%discharge variation. The <br /> value is doubie with a center manifold. <br /> Perforations Per Loteral = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Mlazimum t�mber of P�erforatiorn Rer taten)to Gu�r�r�tee<10lf Discltirye Y�ri�tian <br /> ':Irxn P orarions 1/32 Inch Perforatia�s • <br /> Perforat�on Spann�IFeetl �Re DiarnetQr!lnchesl Perforation SpxinB �Pe�'Anthesl <br /> t tl� ft: 2 3 (feet! t tK i�h 2 3 <br /> � 10 i 13 18 30 60 2 11 16 21 3� 6a <br /> ��'= 8 !2 16 28 54 2µ 10 14 20 31 b4 <br /> j e 11 16 25 52 3 9 14 19 � 60 <br /> 3.'16lnch Pertoracioru 1�B inth Perforations <br /> Perforation SFeactnq IFeetl �����IIM�� P�aation Spacing Pipe pi�rr�(�nthes) <br /> ' tia � tv: 2 3 (Feet1 t t�t 1�4 2 3 <br /> � 12 �8 2b 46 a7 1 21 33 M 74 149 <br /> ��� ?2 �7 24 44 80 2�h 20 30 41 69 135 <br /> s 12 + 1h 22 31 75 3 20 2q 3� �{ 1� <br /> 9• Tota( Number or Perforations equats the Number of Perforations per Latera! multiplied by the Number of <br /> Perforoted Laterols. <br /> 27 �Perf. Per �at. X � 3 �Number of Perf. Lat. = 63 7otal Number of Perf. <br /> �-----� <br /> 10. Select ;ype of Man�fola Connection (End or Center): � End ❑ Center <br /> 11. Select Lateral Diameter (See Tab(e): 2.00 in <br />