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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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Please be aware :2 {* Q* w8 S8 ~) s& H7 w+ u/ T, U
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.
8 E \; ~2 `! A% @! }; J2 _- [. G2. 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.
/ [# m8 {# |; R. |8 M3. 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) " _ c {- W/ c
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.* r2 Q) y6 \$ s1 d
So to make job easy and fast I prefer to use more pipes. % F1 E5 d; \6 R' x$ K! N! B
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
/ Y" A$ L6 S/ l$ `1 w# G7 O The distance of 18 inches is mandatory by SHELL.5 |) k" n) p0 s% a, |
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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