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OSTP Pressure Distribution <br /> MinnesotaPollution Design Worksheet UNIVERSITY ;_ <br /> Control Agency OF MINNESOTA �'�`�.�' <br /> Project ID: 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 = ��laterals Does not app(y to at-grodes <br /> 3. Designer Selected Number of Laterals: ��laterats <br /> Cannot be (ess thon line 2 (accept in at-Qradesl <br /> 4. Select Perforation Spacing: 3.0 ft ' � � /�` � ' <br /> _._ -- '-`�_.�; � <br /> ,. <br /> 5. Select Perforotion Diameter Size: 7/32 in " - -- -- ! <br /> , <br /> ` � <br /> 6. Length of LoterQ(s = Media Bed Length - 2 Feet. <br /> 63 - 2ft = 61 ft Perforation can not be closer then 1 foot from edge. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Latera(s by the Perforation Spacing <br /> and round down to the nearest whole number. <br /> Number of Perforation Spaces 61 ft .- ��ft = 20 Spaces <br /> Number of Perforotions per Loteroi 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 less than a 10% discharge variation. The <br /> value is double with a center manifold. <br /> Perforations Per Loterol = 20 Spaces + � = 21 Perfs. Per Lateral <br /> Ma�nmum N;unber of F'erfaations Pe�Latera(to Guarantee t 1Q�Discharge Yanation <br /> ;Int7 f'e+tcxarc�s i:;2 Incn Pwfarations <br /> Pipe Dia'�,eC�t"I!uh?51 Ferfaradon S�,acir� Pipe Uame:er iir,chesl <br /> F'e�fo�eC4�SpaC'ng IFe�tl <br /> I iv: t�, 2 3 iFeetl t tY: it: 2 3 <br /> 2 10 93 1B 30 60 2 14 16 1i 34 68 <br /> '-'' ° fZ 16 i 2° 5-t 2•: 10 14 20 3Z 6-� <br /> � E 12 16 25 5Z ? 9 14 19 34 60 <br /> ? �6 inch Perxa;ic�ns 1'E Inch Fenarat�ons <br /> Pip�:Dia�eter fi�ch?,l Fe�fcration S�acinq Fip�C�arrwter ilnches! <br /> F'a•{�rcCO�Spai:ng IF�tI <br /> 1 1t: 1�2 2 3 IFeetl 1 1;: t;; j ? <br /> 2 12 18 16 46 87 2 2t 33 44 74 149 <br /> ��� 12 17 24 44 80 2'•: 20 3t� �+t 64 135 <br /> 3 12 15 21 37 75 3 20 19 38 64 128 <br /> 9• Totaf Number of Perforations equals the Num6er of Perforotions per Lotera( multiplied by the Number of <br /> Perforated LaterQ(s. <br /> 21 Perf. Per Lat. X �Number of Perf. Lat. = 63 Total Number of Perf. <br /> 10. Setect Type of Manifo(d Connection (End or Center): [� End ; I center <br /> 11. Sefect Loterol Diameter (See Table): 2.00 in <br /> _ __ <br />