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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 . ~0 y, e9 R3 s" N
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Please be aware :
1 {/ L+ H/ g' N7 v4 S$ A' _: U1. 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. * u& b) Z1 d2 s+ Z0 }, E
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.
. d" O8 V; x* H1 ^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) , m6 R0 J1 C0 \7 Z9 g8 ~& ~
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.( C% ?( P7 ^, e/ l
So to make job easy and fast I prefer to use more pipes.
! Y! f) U- M! \. D. B, R! F As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
2 b* J# P; I# \: _, C The distance of 18 inches is mandatory by SHELL.3 y7 i+ v4 Z4 Z
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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