Laserfiche WebLink
OSTP Pressure Distribution <br /> U��iveusiTY <br /> MinnesotaPollution Design Worksheet Of�1�lNNESOTA <br /> Control Agency .. _ <br /> 1. Select Number of PerJoraCed Laterals in system/zone: �_'� _. �" �� <br /> p��'�''.^ f q 7�x 9C�A3..m ,. '> .a�'�,9�P, <br /> (2 feef is minimum and 3 feet is maximum spacing) �...' � _-..�. � ' ' �„ � °`'�-' ��'�o�q�,, <br /> � _.� <br /> 2. SelectPerforatianSpadng: 3.0 ft `�'�_ 5 }"'gy � r;, .o,'�,��a�. <br /> � f �i 4 '��9 k�� � � ';�rt.'D1bi�� <br /> ; D c�o <br /> I 3. Select Perforo[ion Diameter Sire 1/4 inch �-"- <br /> '. �.r�-:��.�i�,r��., . l�!u 3 <br /> i4. Length of Luterals -Media Bed Length-Z Feet. Perforation can not be cfoser then 1(oot fromf edge. <br /> 63 - 2ft = 61 fc <br /> IS. Determine the Number of Perforation Spoces. Div9de the 1_ength of Locera(s (Line 41 by [he Perforotion Spocing (Line 2)and <br /> I round down to[he neares[whole number. <br /> �I Number of Perforation Spoces = 61 ft = �3 ft - Z� Spaces <br /> i6. Number o(Per forations pe��aterol is equal[0 1.0 plus[he Number of Perforation Spaces (Line 5). <br /> Perforotions Pei Loterol = 20 Spaces + 1 = 21 Perfs.Per Lateral <br /> Check Table 1 to verify the number of perforations per latera(guarantees less than a 10 0"discharge variation. The valiie is double i f <br /> the a center mani(old is used. <br /> �- Totu(Number of Perfo�ations equals the Number of Perjoratrons per Lateral (Line 6)multiplied by the Number of <br /> Perforated Laterafs (Line t�. <br /> 21 Perf.Per Lateral X �Numlxr of Perf.Latcrals = 63 Total Number ot Perf. <br /> 8. Calcula[e[he Squore Feet per Perforotion. IZecommended vo(ue is 4 10 jt' per perforation. ,�,,a,��,o;>�n,.s�w=M� <br /> Does not appl y to At-Grades -- <br /> Bed Area - 6ed Width(fq X Bed Length(ft) �"����� • � � � <br /> ,o� �.ia� o—�'o.se�a:id.._ <br /> 10 rc x 63 ft = 630 ft' °" � °`— <br /> ,s o.�� , o s� <br /> _.....—a:�—r—---rt <br /> z o,. <br /> =_ _9 o es_ g-+�- <br /> Squore roof per Perfaration =Bed Area divided by the Tota!Number oj Perforations (Line 7). -;o o-n �o s�— -- <br /> S.0 D 1 : 0 9] I 26 �.65 <br /> b30 ftZ < 63 perforations = 10.0 ttZ/pertorations y: '"�> '"�" <br /> — — '� <br /> 9. SetectMinimumAverageHeod: 1.0 ft ° �r����`�y'yr�.��I��f:a��J� <br /> .<. � .,��.�..io.m..�:+..,....rs ._.. <br /> 10. Select Per(oration Oischarge (GPM)based on Table IIi: 0.74 GPM per Perforation <br /> 11. Determine required F(ow Ra[e by multiplying the Total Number of Perforafions (Line 7)by the Perforafion Dischorge (Line 10). <br /> 63 Perforations X 0.74 GPM per Perfora[ion = 47 GPM <br /> 12. Select Type of Manifo(d Connection (End or Center): [��end ]ce��ce� <br />