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OSTP Pressure Distribution
<br /> UNIVERSITY � �
<br /> Minnesota Pollution Design Worksheet ���
<br /> ControlAgency OFMINNESOTA �-'���
<br /> ProjectlD: 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 ) + � - � 3�laterals Does not apply to at-grades
<br /> �----
<br /> 3. Designer Selected Number of Loterals: ��laterals
<br /> Connot 6e less than line 2 (occept in at-Qrades) -
<br /> 4. Select Perforation Spating: 3.0 ft - - _
<br /> 5. Select Perforation Diameter Size: 7/32 —_ '.."����,,,-., _ "," _ - -_,-;__
<br /> in -�-,,.—,.�---_
<br /> ,,.,,.,,,�,....�...., -,n, , ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
<br /> 6. Length of Laterols =Media Bed Length - 2 Feet.
<br /> 63 - 2ft = 61 ft Perforation can not be c(oser then 1 foot from edge.
<br /> � Determine the Number of Perforation Spoces. 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 Perforations per Loteral is equal to 1.0 ptus the Number of Perforotion Spoces. Check table
<br /> 8. below to verify the number of perforations per laterat guarantees less than a 10%discharge variation. The
<br /> value is double with a center manifold.
<br /> Perforations Per Lateral = 20 Spaces + 1 = 21 Perfs. Per Lateral
<br /> Maxirt�N�of Perfaati�oru Pef Lateral to Guarantee<10%Dncharge Yariatian
<br /> %�Inc Pertorations 7,'32InchPerforaHons
<br /> Pe�foratan Spaong IFe�t) ���a�t�{���s� Perforation Spxing Pipe D+ame#er(Inches►
<br /> 1 ty1 1�; 2 3 iFeetl t t?� 1�� 2 3
<br /> 2 10 f3 18 3U 60 2 11 16 21 34 b8
<br /> 2'� 8 12 1b 2� 54 2t� 10 14 20 31 W
<br /> 3 8 12 16 2� 52 3 9 14 19 30 60
<br /> 3'16 Inch Perforatians 1'8 Inch Perforations
<br /> Fe�foratio�Spacing IFeet) �PE Dia.meter Ilnches) Pe�foratio�Spacing Pipe Dia�►eter�inch�es)
<br /> S 1Y; 1i: 2 3 (Feetl t t:e 1t; i 3
<br /> 2 12 18 16 45 61 2 21 33 44 74 149
<br /> Zi� �2 �� 24 4Q 64 2�: 20 30 41 69 1's5
<br /> 3 12 16 22 3J 75 3 20 24 38 N 128
<br /> 9• Tota(Number of Perforations equals the Number of Perforations per LQtero( multiplied by the Number of
<br /> PerforQted Lotera(s.
<br /> 21 Perf. Per Lat. X �_�Number of Perf. Lat. = 63 Total Number of Perf.
<br /> 10. Select Type of Monifoid Connection (End or Center): i� end ❑ center
<br /> 11. Select Lateral Diameter (See TQb(e): 2.00 in
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