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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 + T. J; q2 p# j+ X1 a5 {
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9# jjj18
/ L( U* E- S- NPlease be aware :7 s3 V, P; ]2 f( M5 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. 5 S6 A, c, Q' }: k* x/ b8 u# i k
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. * ^, c2 v8 U9 C. S2 L8 L8 q6 H
3. 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) $ |6 `2 S2 E9 _# V5 o* s' n
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.' A$ I+ ?' [" J t
So to make job easy and fast I prefer to use more pipes.
: n5 k" T, P$ R/ U/ i As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.4 |. U4 C5 w/ D- `+ N
The distance of 18 inches is mandatory by SHELL.
6 {0 O! o% E4 P. b: d# ]3 qIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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