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<br /> PRES5URE DISTRIBUTIOt�1 SYSTEM
<br /> 1. Select number of perforated laterals � � »- � ��'�'
<br /> �.,_
<br /> 2. Select perforation spacing = ��� _ ft.
<br /> 3. Since perforations should not be placed closer than 1 ft. to
<br /> the edge of the rock layer (see p. F-14), subtract 2 ft. from the '
<br /> �
<br /> rock layer length. `'�
<br /> .:� .
<br /> ,� , ;,
<br /> Rock laycr lenRth — 2 f t. � �� f t.
<br /> 4. Determine the number of spaces between perforations.
<br /> Divide the length above by perforation spacing and round E-17a
<br /> C�OWI't t0 riedrE'St W�'IOIe riUITIbeT. TABLEOFPERFORATIpNDISC�iARCESItic;>�.�
<br /> "' Head Perfora�ion cii.unetc:(mches)
<br /> Len th erf. s acin %���"� ft. = -=�� ft. _ �.' s aces �t3z �!4
<br /> � P P g -`. �3) (2) P
<br /> 1.Oa 056 0.79
<br /> 1.5 0.69 0.90
<br /> 5. Number of perforations is equal to one plus the number of 2.ob t�^� i.oa
<br /> 2s ��� �.»
<br /> perforation spaces . 3.o ava � �s
<br /> 4.0 1.13 t.47
<br /> 5.0 1.26 1.65
<br /> spaces + 1 = -".�"� perforarions/lateral aUse 1.0foot of head for residential systems
<br /> bUse 2.0 feet of head Eor other establishments
<br /> 6. Multiply perforations per lateral by number of laterals to
<br /> get total number of perforations. E-17b
<br /> ` .. wum�.ue.ar dmi.w qur.mcn Rnxr:eo�S�ue.:ie
<br /> �.... ' : ..'' ryruea<IO�O�eOe�e.uWm
<br /> laterals x perfs/:ateral— �?� .—perforations. �-�. 1,2$inch I.S intn 2.O ir;r
<br /> trrl
<br /> 2.5 �4 �g ��3
<br /> 7. Deter.nine required flctfr rate by multiplying 3A 13 i� � z�
<br /> number of perforations by flow per perforation a.o ii is � 2�
<br /> (see page E -li; s.o io �a I z,
<br /> � ' �� ..:..r`.�. _�'
<br /> �r5 X ��i:..,� �..�.� ��r.;. �:.��
<br /> �,�.�., ��.�.r�,..,.,,,,,,�M•,��
<br /> � I8. If laterals are connected to header pipe as shawn on page E-
<br /> � �
<br /> 15, select minimum required lateral diameter from table on ;�•�...�.• �
<br /> page E-17; enter table with perforaH�n �pacing ar.d number �,,,.�✓�..•�'"' ���'
<br /> of perforarions per late�ral. Seleci :ninimum diameter for ���
<br /> perforated lateral = ' inches.
<br /> F-12
<br /> . ,.�..t
<br /> 9. If perfora+ed latPr�: system is attached to manifold pipe near �„�_.__r �„-
<br /> the center, a�, �n page E-12, perforated lateral length and �"�'
<br /> -�
<br /> number af perfor-ations per lateral will be approximately one "�'�`'�� �
<br /> •yu�t_�
<br /> half oE that in step 8. Using these values, select minimum _� . ,,,,
<br /> diameter for �erforated lateral fram page E-17 as �,,.,�'` "�
<br /> inches.
<br /> : �i.��
<br />
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