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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 :1 \4 E8 }- G; o% V
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. 2 D* h1 @& [, D/ s, {5 d
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.
7 I$ X: r2 m5 r* b% C3. 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) , F; ?0 D5 O5 J5 U
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
# a$ v9 X/ \) w5 T$ q* j/ n So to make job easy and fast I prefer to use more pipes. ; S, d, F% N: a! m& ]7 a
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
7 j$ P7 m; D- a The distance of 18 inches is mandatory by SHELL.
, [5 h* G/ S. p! jIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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