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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* S. Z4 B/ c! Q1 X+ S1 z
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Please be aware :' s7 L4 {8 _: y9 b
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. 1 I; J0 u% D- J8 V9 _- j
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.
' M, G0 s/ n- ]0 h b+ d3. 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) ; S- n' A) m! p' Z4 L/ q
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
% F$ o: _2 ^. `# z, j& ^1 f% { So to make job easy and fast I prefer to use more pipes. 1 d9 i, Y! k! S' B9 ?4 K+ `
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
( |+ ~9 |, C, X The distance of 18 inches is mandatory by SHELL.
* P/ A8 m# e& t6 X- cIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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