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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 L& ]3 o) y* b3 s: |$ G
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Please be aware :
; T& C% p) B ]3 p1. 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.
W' s5 n2 o1 }, W F( W3 \- E2. 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. 2 O& Q) Z3 b$ ?% o% H, ` N
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)
, a: |- K( J/ @5 R- X& g4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
9 n3 u2 N$ B" B1 r% s4 A2 S% q So to make job easy and fast I prefer to use more pipes. 3 V4 B7 Q% x# g9 n
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.- i/ E' `+ K: D% B2 {0 ?
The distance of 18 inches is mandatory by SHELL.( E, E+ t# P7 h( a3 h
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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