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OSTP Pressure Distribution <br /> Minnesota Pollution <br /> Desi n Worksheet uN1��Rs�TY <br /> Control Agency � OF MINNESOTA �=�\._'��' <br /> Project ID: v 06.12.13 <br /> 1. Media Bed Width: �� ft <br /> 2. Minimum Number of Laterats in system/zone = Rouded up number of [(Media Bed Width - 4) = 3] + 1. <br /> ( 10 - 4 ) + 1 = �laterals Does not app(y to at-grodes <br /> 3. Designer Selected Number of LQterols: �laterals <br /> Cannot be less than line 2 (accept in at-¢rades) <br /> � . <br /> 4. Select Perforation SpQcing: 3.0 ft � ` ' <br /> �� <br /> :,,_ ., ,.., � <br /> -- .. _ _ <br /> 5. Select Perforotion Diameter Size: 1/4 in - �- _ �" <br /> __ ,.,. ':, ,,:;�.:. , , <br /> 6. Length of Loterols = Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation can not be ctoser then 1 foot from edge. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Laterols by the Perforation Spocing <br /> and round down to the nearest whole number. <br /> Number of Perforotion Spoces 61 ft .- �ft = 2Q Spaces <br /> Number of Perforations per Lateral is equal to 1.0 plus the Number of Perforotion 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 Loteral = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> Ml�xi�n Nurr�r of Perforations Per Lateral to Guarantee�10�Dncharge Yanat�on <br /> �,Inc�Ft�tvre,�c�s ?,?2 Inc�Pe�fara:ions <br /> F7p•:�Dta!'}e,:•r al*tChesl Fe�foratio�Spatinq Pipe[hameter ilnchesl <br /> Pe�forat'on ipacmg Ifeetl <br /> t tt: 1�: Z 3 �Fc_�tl t SK� tt; � 3 <br /> 2 10 t3 18 30 60 2 11 t6 2t 34 b8 <br /> t�: 8 12 15 2p 5-t 2'.: fi} 9a �D 's2 5� <br /> ? 8 12 16 25 52 3 9 1d 19 30 �0 <br /> 3 16 inch Per�ra;ic�n� 1 8 inch Periorat�ns <br /> Ftipe Die.�ete� :'I�che:l Fertoration Sp�ing �ipe Ctemeter iirches! <br /> Fe�forat�on Spai;ng IF�rt <br /> 1 iY. 1�; 2 3 i�ee:! i !?: 1i^ 2 3 <br /> 2 12 18 26 46 �1 2 ti 33 �1 14 149 <br /> - . 12 17 24 4() 80 2�: 2Q 30 41 5Y �35 <br /> 3 12 16 22 37 75 3 20 29 38 63 128 <br /> 9• Total Number of Perforotions equals the Number of Perforations per Laterol multiplied by the Number of <br /> Perforoted Latera(s. <br /> 21 Perf. Per Lat. X ��Number of Perf. Lat. = 63 Totat Number of Perf. <br /> 10. Setect Type of Manifold Connection (End or Center): ] End � Center <br /> 11. Se(ect Latera!Diometer (See Table): 2.00 in <br />