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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
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9# jjj18
6 U9 L" s# C2 CPlease be aware :1 E8 F& p7 v8 n1 f# ~- p
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.
) k" L3 H- U' h# a3 Z& f4 {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.
, K/ f2 R6 v$ u$ S( W! D) h. Q2 e3. 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) 0 [1 A. U% F8 y
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
& r; V" S' w9 B* H- R; r So to make job easy and fast I prefer to use more pipes. 3 _1 W- s1 ^7 v( a, y2 f
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.8 r5 [" [0 r5 Z6 Q; p i
The distance of 18 inches is mandatory by SHELL.# o4 L; {# y' L3 z* K/ V, z$ }; r
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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