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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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' b$ H" ~& @ m0 f6 L q' D2 Q; _Please be aware :- J% x0 J0 O+ X& {, X
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.
# C, b6 q$ Y% {7 B2. 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. 1 ^+ ]- Q6 v$ M& y6 S s3 `
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)
2 c: J. `, o. s- a6 I6 c3 [' V4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
* U% J( x! }# v. h- }, t" a1 M( q5 d So to make job easy and fast I prefer to use more pipes. $ S( ~9 `7 }+ C
As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
$ O# K, p# L4 m, T5 W- e x# j. f( H The distance of 18 inches is mandatory by SHELL.+ m! b1 e1 N" W# f* V$ S6 ^* A+ Y
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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