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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 : T2 A8 I O$ \' ~7 X$ [
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2 H7 R- q- Y; O) s; q5 N' vPlease be aware :! z6 P9 f4 d+ |6 E; w
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. , V& ?* q& m: E, t
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.
: N4 m# j* E" i, n, M3. 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)
8 k/ h: R/ W2 y; E* K/ n4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.5 ^5 ^$ ?* x# B: o: k$ Q& T
So to make job easy and fast I prefer to use more pipes.
& I. w1 V+ T& b+ d: Z2 e4 D2 E As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
! w: s+ P8 J' q; O The distance of 18 inches is mandatory by SHELL.* R! l+ _# l5 u" a+ _ r8 x* ?
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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