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. , <br />� <br /> OSTP Pressure Distribution . <br /> � � , UNIVERSITY � T` � �� <br /> �� . <br /> �����Q����� Des�gn Worksheet OF MINNESOTA �,;�; <br /> Controi Agency Z, <br /> t. Select Number of Perforated Luterols in system/zone: � . � <br /> � <br /> (2 feet is minimum end 3 feet is maximum spacing) �''� �'�'T z'°��* <br /> 2. Setect Perforation Sp�cing: 3.0 ft - - 12�- - <br /> 9•oF rodc <br /> 3. Select Perforation Diameter Size 1 i4 inch ���,h.�,��, <br /> Pei(oraGan 2'm 3' <br /> 4. Length of Larerols =Media Bed Length-2 Feet. Perjoration can not be closer then 1 foot from edge. <br /> 50 - 2ft = 48 ft <br /> 5• Determine the Number of Perforvtion Spaces. Divide the Length of l.aterais (Lir�e 4)by the Perforotion SpQcing (Line 2)and <br /> round down to the nearest whole number. <br /> Number of Perforation Spaces = 48 ft = ��ft = 16 Spaces <br /> 6. Kumber of Perjorotions per taterai is equal to 1.0 plus the Num6er of Perforation Spoces (Line 5j. <br /> P'erforations Per Laterol = 16 Spaces + 1 = 17 Perfs.Per Lateral <br /> Check Toble 1 to verify the number of perforotions per loteral gua�antees less than a 10%discharge variation. The value is double if <br /> the Q tenter rranifotd is used. - <br /> 7. Totat Number oj Perforottoru equals the Number of Perforutioris per Laterol (Line 6)muttiplied by the Number af <br /> Perforated Loterats (Line 1). <br /> 17 Perf. Per Lateral X �Number of Perf. Laterals = 51 Totat Number of Perf. <br /> 8. Cakutate the Sqoore Feet per PerforaHon. Rerommended vntue is 4-10 ft 2 per perforotian. ���� <br /> Does not appty to At-Grades �„� <br /> Bed Area = Bed Width(ft)X Bed Length(ft) <br /> "`°°a '�. '�,. '�tt '�, <br /> 1_O' �� O.it :s0.�1 �R46 0.�4-�� <br /> 10 ft x 50 ft = 500 ft2 +•s °.� °." °'" °.' <br /> xC o.ia osv aw �.w <br /> iS 0.29 0.65 0.i9 t.t7 <br /> Square Foot per Perforallon =Bed Area divided by the Totot Number of Perforations (Lir�7). � > aa: :a.n a�s r.:a <br /> 1.0 0.2T 0.67 1.1] 1.47 <br /> s .�`�. O.M �::�.tl.9] -.1,2i �� .-1,65.-= <br /> 500 ftZ .- 51 perforations _ 9.8 ftZ/perforations ,,,,� ,����t61���«� <br /> 9. Select Mirri►n�m Average HeQd: 1.� ft ��a����������� <br /> 2 faN o��lh� <br /> 7/41nd��d 3/16 tiU peipatWis on�IS <br /> 5 faet t/a kKh pMatatlp�s on MSf5 <br /> 10. Select Perforation Disctwrge (GPM)based on Tabte III: 0.74 GPM per Perforation <br /> �1• Deternrine required Fl�v Rate by multiplying the Totai Nurnber of Perforations (Line 7)by the Perforation Discltorge (Line 10). <br /> 51 Perf�ations X 0.74 GPM per Perforation = 38 GPM <br /> 12. Select Type of Monifold Connection (End or Center): �� ❑� <br />