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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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9# jjj18
$ x- B, f' ^; W, ]Please be aware :
1 ^7 t" Y! \9 W& Y0 l' F/ w+ E1. 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.
! h. G; {. y9 f8 E( ]/ d2. 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.
* F( S& k/ K6 A$ G1 b3. 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)
! ?# r* i/ B8 C4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.: ?% G! E: N: d8 U, U
So to make job easy and fast I prefer to use more pipes.
! I3 B8 d2 m6 n& `8 [0 F7 r As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.9 [- W6 h+ Y0 @$ f
The distance of 18 inches is mandatory by SHELL.
b/ f& C- e9 h2 ?/ i9 LIn this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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