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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 4 [. X: ~/ X5 |$ j' |2 D0 p D" |3 J
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Please be aware :4 g9 H/ ~$ \# t0 W7 p7 V8 P* y# h, p
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.
# }/ G' K$ J' o6 _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.
, {; `4 J" W3 w3 w0 e3. 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) 5 g1 c# Y; U+ A1 d- C6 N
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
) P- ]& U1 P' i, V4 [0 w So to make job easy and fast I prefer to use more pipes. ) ]; `- S, _& _) Q4 X6 j
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.; }6 ~' y: [0 k4 F3 a
The distance of 18 inches is mandatory by SHELL.. P# C& _3 z/ m
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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