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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 :2 F2 y+ _- O8 v( P( L! C( U, X
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.
9 T! x' ]+ d6 J# B6 v# u2. 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.
: d' v/ K# p0 A' `/ b1 r3. 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)
0 e( B0 u$ ~! \8 r- Q4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
- p- ]0 L/ I- x$ l So to make job easy and fast I prefer to use more pipes. . N% {) |9 Z7 Y: M' v* S: O+ _) F
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
) v: R h/ g# x) L0 T, `& x, N The distance of 18 inches is mandatory by SHELL./ K& T0 q6 f, G. R& K' U
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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