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发表于 2010-4-18 15:27
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本帖最后由 jack_lai 于 2010-4-18 16:39 编辑 & \% G1 I- I* M$ }) T G
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9# jjj18
6 M+ F% O7 @5 O6 J) L4 F# [; g. UPlease be aware :, r( x9 |( j) R2 P. z1 y8 ~
1. In order to reach the instruments which are above the Grid Floor A ,see F1 above, cables coming from the Branch Tray C have to pass the Grid Floor A. , [$ I' X% R. `4 ~
2. If using basket tray to conduct cables, you have to make a hole at the Grid Floor A by cutting a piece of stuff from the Grid Floor A. then the basket trays can go through the Grid Floor A.
% p( l" N7 C0 e& p8 L) O3. IF using a pipe to conduct cables, because the size of the pip is one inch you can make a small hole at the Grid Floor A by a iron bar(撬棍) % \: b1 i) {# e( L, z) _
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.$ w/ p# n1 h/ C3 R' L
So to make job easy and fast I prefer to use more pipes.
, O6 i5 D* X: V, W/ Y% {5 K As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.* ~1 e4 }# q& Y0 L
The distance of 18 inches is mandatory by SHELL.6 r/ k9 k2 ]& L
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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