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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 :! c9 X- n) {3 e0 v9 B3 \
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 a& S& P. q! H3 ]" b. o
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.
. H, \" p' d7 W7 K% T9 _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) 5 B8 B0 o! _0 e4 z
4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.0 n1 ]. A, E. Y& A
So to make job easy and fast I prefer to use more pipes.
. ?" {: c4 T G( g% u: D7 n As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.3 b, T2 Z% Z& R" Z3 E, m! U8 J! `
The distance of 18 inches is mandatory by SHELL.
% w, w% k7 W% kIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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