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, ' � ' PRESSURE DISTRIBUTION SYSTEM Ceotextile fabric �
<br /> ` 1. �c'lect numb�r of perforated laterals " uarter inch. erforations s aced�3' • 12��
<br /> ? ,J ft ; ... . . . '. � . y"uf'F��k .
<br /> 2. ��lect��rfora�*ioat si�aczn� _ ' . - � � -
<br /> + ' ° . • Perf Sizing 3/�'' '7�3 Z��
<br /> � . � 3. �uice perfurations shoulc�not Ue pl�.ced closer than 1 foot to Perf Spacing 1.�' _
<br /> . th�edbe of the rocl:layex (see diagram),subtract 2 feet from � �
<br /> �ltt:rock layer len�th: , E-4: Maximum auowoble n�r,�ber of 1/4•inch per(orafions
<br /> � per lateral to guarantee<10"/o discharge variation
<br /> -1�cl�la}:��r -;� -` rt = Z.� ft perfqraHon
<br /> spacing
<br /> ,�. i_��tern.i.�� k!«n��n:�er or sn«ces batti een p�r�orations. feet 1 inch 1.25 inch 1.5�nch 2.0 lnch
<br /> �)ivide the length(3) by v�rforation spacing(2)and oX und
<br /> ,i,nvn t�nearest whole nuniber.
<br /> � 2.5 8 • 1a ld , 2d
<br /> P�rforation spacing�-��ft=z� ft=�spaces :�.0 8 1.; 17 '20
<br /> 5. .�umber of perforations is equal to one plus the number of 3,3 7 1? l0 25
<br /> ,��rforation spaces(�). Ch�ck figure E-4 to assure the number of 4,0 7 11 15 23
<br /> ,��v forutions per lateral gacara�ztees <10% discharge vari�tion.
<br /> 5,0 6 10 14 22
<br /> �
<br /> �� spaces + 1 = 1 Z perforations/lateral E-6: Perforation Discharge in gpm
<br /> 6. �. Total number of perforations = ��crfu;�tions per lateral (5) perforation diametar
<br /> tim�s number of lateral� (1) h�Ud inches�
<br /> (feet) 1/8 3/16 7/32 1/4
<br /> � Z perfs/lat x fo _lat=2�perforations �,Oa 0,18 0.42 0.56 0.74
<br /> G. ('al�ula<<� the:;qi�are f�:�t�3bE'per perforation. 2,0� 0.25 0,59 0.80 �! U4
<br /> ::!��,,�.1�: bt ��-�'� sqtt;�P�•f. Dotrs not upply to at-grades.
<br /> l:c.ck uc��: ar�_a � r x:< ��� dih ;ft) x g�ck length(ft) 5.0 0.41 0.94 1.26 1.65
<br /> —��' I�t X__y'�—ft'--7�c=�qf�i , ° Use 1 A fr.u�tor sin�l�7-family homes.
<br /> S��uare Euot���r p�rio�:a�i�n �= Roct: �ed area-�-number �t perfs (6) b us����rr���r .��-�nvrr��r ��i5�
<br /> ' 7 s'c� s�ft=_ �� perts = /o�y sqft/perf __ _
<br /> ;. )�`e�.,�n��:c���i_�d i'c��,� rai:by multiplying the total number o,'' � ,� ,,�w ,�,
<br /> �� , ���r�;.,���,;�:; ��=:,,; b,� :::�r� p�r perforatiori(see figure E-6) � ���,�«�c��p
<br /> �,3_� �� s �'%�
<br /> .��� , -�-�—t-�'-•° x �' �..�Pmip��r{s='YU gpm ��� �
<br /> ����� � �
<br /> 8. it laterals are connected tu hea��er pipe as shown on upper �- ;.�
<br /> S� dletriU161oCUGu�
<br /> �xample,to select minimuin required lateral diameter;enter �� olppenc+npu+rA
<br /> i�bure E-4 with perforation spacing(2) and number of perforati�,-��� :�g�e E•1:Man�old located at End of System
<br /> per lateral(5) Select minimum dia�rrete�for -
<br /> ��erforated lateral= incltes. FigureE•2:Manifoldlocated i%��"a"�
<br /> In the Center ot the System
<br /> y. �f perfurated lateral system is atta�he� to manifold pipe near /
<br /> �lic center, lower dia�ram,pari�orated lateral length(3)and ���y�������� /
<br /> ��umbrr of perfurations per lateral (5)will be approximately one `�-�� ,j�
<br /> n��lf oY that in step b. Usin�; thr�se vaiuc��. :,elect zninimum '� `������%
<br /> � �,�'�%_ytenaetu:cu�n
<br /> ,li.��n�t�r for perforated lateral = � //Zinches. i orwwua�,��G
<br /> G'" � 3���
<br /> .�
<br /> '/%' H �uu�n'x.inN� �
<br /> � i
<br /> ----
<br /> `.
<br /> � �e.�:.iy th� i h.,ve�,ro,rr�let�a ttus work in accordance with appli�able ordina.ncrs, rules arid lativ�.
<br /> ��- ,- -� ...
<br /> GCtL;�(J �� � �'�o si nature' �� ��(license#) L�'-{—��..� ��'J�.(date)
<br /> --r -� -- -�- ---�___—1 � 1; ..
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