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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 :# }9 b& ?' `' r
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; V7 P( B9 y$ Y, r' J7 B m2. 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.
, x5 F+ W% I4 D$ [2 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)
+ t v7 [- l) a7 I3 L4 f) Y+ ~4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
$ S7 x+ k- {* M: o. z So to make job easy and fast I prefer to use more pipes.
4 K$ x8 L, m. b7 b As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.& e$ w" ?- k" I* ]3 w P9 c, l0 X
The distance of 18 inches is mandatory by SHELL.$ a* I$ a2 u& H) T
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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