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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 + @+ S( V( U4 `4 g, Y: z
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, Y1 Z- X! A3 g3 g6 w( F, V! RPlease be aware :+ }0 u5 Y8 y4 X# o6 V& T
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.
, {% } h* Z1 w/ H9 H9 J7 o2. 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; }& P, r' ^8 e x& v: f) v
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) p4 w- q& Y" Z- C6 P( S* K2 L
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
$ g2 |0 ^" y ]. N* D So to make job easy and fast I prefer to use more pipes.
1 B& b8 b6 ]" f/ R As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
) s! c% P0 Q, a: B The distance of 18 inches is mandatory by SHELL.; I( ]. X5 x4 G( W; o/ d% l0 A
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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