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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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/ U3 }7 @/ \) s/ [3 _. wPlease be aware :
* @5 L! @8 E4 j$ @$ y* O8 a1. 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. 5 | `' b9 T( f6 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. * X& b, V4 Q/ ~8 {0 z% U; D
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)
B- x; _. P' |' u# B# L4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.8 d0 V8 e% w/ p6 f- `+ r- S
So to make job easy and fast I prefer to use more pipes. 3 L" S r- l9 {6 K
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
2 I9 m! G" ~5 U& {3 U! w The distance of 18 inches is mandatory by SHELL.
, o' l, e+ [' G; I6 E- @) R, Y( TIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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