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OSTP Pressure Distribution fi� � fr1 .: <br /> Minnesota Pollution Desi n Worksheet UNIVERSITY � ~�� __ � <br /> Control Agency � OF MINNESOTA �'''s...,`�.� <br /> Project ID: v 05.13.14 <br /> 1. Media Bed Width: 24 ft <br /> 2. Minimum Number of Laterals in system/zone = Rounded up number of [(Media Bed Width - 4) = 3] + 1. <br /> ( 24 - 4 ) + 1 = �laterats Does not opply to ot-grades <br /> 3. Designer Selected Number of Latero(s: �laterals <br /> Cannot be less than (ine 2 (accept in ot-Qrades) -- �--- <br /> 4. Select Perforotion Spacing: 3.0 ft � � �� __ '__ <br /> i1•• Mm�rrwr� <br /> /'pe�tora[wm aP.�<..E 3'upan 1'1'o!ro�4 1T" <br /> 5. Select Perforation Diameter Size: 7/32 in — ��..�,... ' - <br /> PrAdat.o�+a.ruuf. li'-�fo���inn s4xfnN.1 <br /> b. Length of Laterals = Media Bed Length - 2 Feet. <br /> 46 - 2ft = 44 ft Perforation can not be closer then 1 foot from edge. <br /> � Determine the Number of Perforation Spaces. Divide the Length of Laterals by the Perforotion Spacing <br /> and round down to the nearest whole number. <br /> Number of Perforotion Spoces 44 ft - �ft = 14 Spaces <br /> Number of Perforations per Loterol 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 Latera! = 14 Spaces + 1 = 15 Perfs. Per Lateral <br /> Maximum ll�enber of Perforatioru Per L�er�to Guarant�e<.10l►Di�ch�rge Ya►iation <br /> '.Inc P orat�ons 7/321nch Per#orations <br /> Perfon�tior�Spaang IFeei) ���t�;��? Pecforation Spacing Pipe Diimeter I��ches# <br /> 1 1u 114 � 3 (feedl 1 1K 11. 2 3 <br /> 2 10 13 18 3t3 6U 2 11 16 t! 3�1 b8 <br /> 2ti: 8 12 16 28 54 21: 10 14 24 32 b4 <br /> 3 8 12 1b 25 S2 � 9 1� 19 30 i4 <br /> 3.'1 b krch Perfora,*ioru 1?61rxh Perforations <br /> Pipe Diameter llnchesl Perforation 5pacing Pipe Di�meter tirxhes) <br /> Per#oration 5puing(Fe,Et) 1 !1� 1� 2 3 �feetl 1 1� 1V: 1 3 <br /> 2 12 18 16 �6 81 2 21 33 44 74 119 ' <br /> 1Y� 12 17 24 �0 s0 3�: 20 34 41 69 135 <br /> 3 !2 16 21 37 75 3 10 29 38 N 12E <br /> 9• Tota( Number of Perforotions equals the Number of Perforotions per Latera! multiplied by the Number of <br /> Perforated Latera(s. <br /> 15 Perf. Per Lat. X �Number of Perf. Lat. = 120 Total Number of Perf. <br /> 10. Select Type of Manifold Connection (End or Center): � End ❑ center <br /> 11. Select Lateral Diameter (See Table): 2.00 in <br />