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� ���,.�..� OSTP Pressure Distribution <br /> � % UNIVERSITY <br /> '"'�„�',��°^ Desi�n Worksheet OF iV11NNESOTA ;L <br /> ti <br /> 1. Select Number of P+erforated Loterals fn system/zone: �3 � � <br /> Minimwn <br /> (2 feet 1s minimum and 3 feet is muximum spodng) '�'P"fO'"�01� 3' 2'�r� <br /> 2. Select Perforotion Spacing: 3.0 ft I _ 1z-- - <br /> 9'cfi roek <br /> 3. Select Perforotio►r Diometer Size 1/4 inch ��,���,�� <br /> Pa(oratron ' .2'to3' <br /> 4. Length of Laterots =Media Bed Length-2 Feet. Perforction can►at be cl�er then 1 foot from edqe. <br /> 50 - 2ft = �ft <br /> 5• Determine the Number of Perjorntiort Spaces. Divide the Le►►gth of LateraLs (Line 4)by the Perjoradon Spucing (Line 2)and <br /> ramd dawn to the nearest whole number. <br /> Number of PerforaHon Spuces = ��ft = �3�ft = 16 Spaces <br /> 6. Number of Perjorattons per Loteral is equal to 1.0 ptus the Number of Perj'orcdon Spaces (line 5). <br /> Perforatlons Per Lcteral = 16 Spaces + 1 = �7 p�_p���� <br /> Check TnWe I to veriJy the number of perforatior�per laterat guarcntees less than a 10%dischurge variotion. The value is double if <br /> the a center manifold is used. <br /> 7• Totat Number of Perforations equats the Number of Perforotions per Lateral (Lir�6)multiptied by the Number of <br /> Perforated Latemts (Line t). <br /> 17 Perf.Per Lateral X �Number of Pert.Laterats = 51 Total Number of Perf. <br /> 8. Catcutate the Square Feet per Perforotion. Recommended�lue is 4�0 ft 2 per perforotion. ���� <br /> Does rrot apply to At-Grades .�,,,,r„� <br /> H..a an , , , <br /> Bed Area = Bed Width(ft)X Bed le�gth(ft) % �N �n '�. <br /> �.d a�s o.�� ass o.�s <br /> 1 o t� X GO p a GAA �.2 1•S 0.22 OAi 0.49 0.9 <br /> �� :7 �� :7VV TL � o.2i.� O.S!�� �.`�OJOc. 7.0��.� <br /> 25 0.29 O.tS LLif 1.17 <br /> . Squcre Foot per Perforahon =Bed Area divided by the Total Number of PerJoratlor� (Line 7). �o o.a: o.n a�. ,a, <br /> I.0 0.�7 0.�7 1.13 1.17 <br /> S. 0.41� 0.!7 1.26 1.f6 <br /> 500 ft2 } 51 perforatiorn a 9.8 ftZ/perfarations ,r„� „�3n6 k^�� <br /> 9. Select Mfinimum Average Head: 1.0 ft ����������� <br /> z r«c nrr asami�Mnn+a <br /> 1!4 Ych aM L76 Ylth pNontbm anhKTS <br /> ShN 7/84d�perforatldsonMSR <br /> 10. Select Perforatlon Dlscharge (GPM)based on Table III: 0.74 GPM per Pertoration <br /> 11. peterm;ne required Flow Rcte by rtiultiptying the Tota(Number of Perforotions (Line 7)�r the Perjoration Dischorge (Line 10). <br /> 51 Perforetions X 0.74 GPM per Perforat�n = 38 GPM <br /> 12. Select Type of Mar►ffold Connection (End or CeMer): ❑� Q� <br />