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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. q4 b1 p% M- f
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Please be aware :
; J9 Y. F" v. y* \( u+ B1. 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.
7 n- U% }0 L: @4 A. y% u3 w% q2. 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. ' u& Q4 B) F. E" 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)
# R# c; X, g% G5 w, Z h, n+ ]4. While you finish one hole for the tray, you can finish 10 holes for the pipe with the same time.
0 i; {" B5 W& m' `( ~ F So to make job easy and fast I prefer to use more pipes.
Z+ V6 x6 |# y3 E As shown on F2, see the Ins A. If x or y is >18 inches I cut a hole for the tray.
! R" J4 p3 u0 f% m, n0 k6 i The distance of 18 inches is mandatory by SHELL.' [! b; a! |( o5 ]
In this case about 85% instruments above the Grid Floor A have been serviced by pipes. |
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