IM 738-2
27
Mechanical Installation:
Rigging and Handling
Lifting Points
To determine the required lifting cable lengths and whether
four-or six-point lifting is required, use Tables 8 and 9 and
Figures 33 and 34.
Referring to Figure 33 and Figure 34, note that dimension A is
the distance between the outer lifting points. The four outer
rigging cables must be equal to or longer than dimension A.
Dimension B shows the minimum distance between the outer
and the inner lifting points for six-point lifting. Use this to
roughly determine the required length of the middle cables for
six-point lifting. Determine dimension A by subtracting
dimensions X and Y from dimension Z (e.g., A = Z – X – Y).
Where:
Z = Total unit length in inches
(refer to certified drawings for this dimension).
X = Outdoor/return air section length (refer to Table 8for this
dimension).
Y = Refer to Table 9 for this dimension (see Figure 33 and
Figure 34).If A
≤
288" (7315 mm), 4-point lifting is sufficient.
If A > 288" (7315 mm), 6-point lifting is required.
Figure 33. Unit type RPS/RDT lifting points
Table 8: X dimension (Figure 33 and Figure 34)
Outdoor/return air section
015C–030C
036C–040C
045C–075C
080C–135C
in
mm
in
mm
in
mm
in
mm
100 O.A.
0
0
0
0
0
0
0
0
Plenum
40
1016
52
1321
48
1259
72
1829
0–30% O.A.
40
1016
52
1321
48
1259
72
1829
0–100% economizer
40
1016
52
1321
72
1829
96
2438
0–100% economizer with 15” return fan
62
1575
—
—
—
—
—
—
0–100% economizer with 30” return fan
52
1321
52
1321
—
—
—
—
0–100% economizer with 40” return fan
—
—
80
2032
—
—
—
—
0–100% economizer with return fan
—
—
—
—
72
1829
96
2438
Table 9: Y dimension (Figure 33 and Figure 34)
RPS unit size
Dimension Y
015C–030C
49.5" (1257 mm)
036C & 040C
38.2" (970 mm)
045C–090C
39.5" (1003 mm)
105C
30.5" (775 mm)
115C–135C
39.5‘” (1003 mm)
A
Z
X
Y
4 L i f t i n g P o i n t s
Summary of Contents for RDT- 036c
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