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, <br /> � OSTP Pressure Distribution :;,� <br /> MinnesotaPoliution D ' UNIVERSITY �!� <br /> Control A nc <br /> es�gn Worksheet OF MINNESOTA 1..y,,,``' <br /> Project ID: v 03.19.15 <br /> 1. Media Bed Width: �� ft <br /> 2. Minimum Number of Laterals in system/zone = Rounded up number of [�Media Bed Width - 4) : 3] + 1. <br /> ( 10 - 4 ) + 1 = �taterats Does not apply to at-grades <br /> 3. Designer Selected Number of Laterols: �laterats <br /> CQnnot be iess than (ine 2 (occept in aC-aradesl <br /> 4. Select Perforarion SpQcing: 3.0 ft � " � � • __ <br /> �.�wwW.xlrw..4*ae.d 1 ...� t'M..�.Y •�._�1 .. <br /> 5. Select Perforation Diameter Size: 7/32 in .-« <br /> __._._.�.__ _�._ _ .__ _ <br /> ,,.,w� �..�:�.. <br /> 6. Length of Loterats = 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 Spoces. Divide the Length of Latera(s by the Perforafion Spacing <br /> and round down to the nearest whole number. <br /> Number oj Perforation Spaces 61 ft = �ft = 20 Spaces <br /> Number of Perforations per Larerot is equal to 1.0 plus the Number of Perforation Spaces. Check table <br /> 8. below to verify the number of perforations per tateral guarantees less than a 10%discharge variation. The <br /> value is double with a center manifold. <br /> Perforations Per Laterot = 20 Spaces + 1 = 21 Perfs. Per Lateral <br /> MaxirAuei Nixnber d P�rforitions Ptr taNt�l to Gu�rantse�40�i Distlw�t Y�natian <br /> '.Mch P ont�p�s Tt32 Inch PKfofiaoru <br /> Pe+foru�on Spxin�1Feet) �Di�meter lirxhesl Perfor�tion Spxing P�pe Aan+eter(k�ct+es) <br /> I 11� t�t 1 3 (Ftttl t t�i tv; 2 3 <br /> 2 10 13 t� 30 60 2 tt 16 21 3� i1 <br /> 1�h E 11 !b 1d S� 2�: 10 ta 20 32 61 <br /> 3 8 12 16 2S 52 3 9 1� 19 30 60 <br /> 3'16 tnth Perforations t 'S let4�Perf�ratioru <br /> Parforation Sp�cing IFeKI �Di�meter Ils�chest p�5,p�i� P�e Diut�etei Ik�chesi <br /> t 1s� tw I 3 (f�l 1 ttt t�: 1 3 <br /> 2 12 f1 t6 K 87 2 2t )3 �4 7�! 1+9 <br /> 1�: 12 17 24 �Q dQ 2+: 2Q 30 �it 69 135 <br /> 3 12 t� 12 37 75 3 20 29 3a M /2E <br /> 9• Totol Number of Perforotions equals the Number of Perforotions per Laterat multiplied by the Number of <br /> Perforated�aterals. <br /> 21 Perf. Per Lat. X �Number of Perf. Lat. = 63 Total Number of Perf. <br /> 10. Select Type of Manifo(d Connection (End or Center): �; End ❑ Center <br /> 11. Select Lateral Diameter (See Toble}: 2.00 in <br />