Manitowoc 3900W - EXAMPLE - Determining Total Load and Maximum Working Radius from Lower Boom Point

CAPACITY CHART INFORMATION
F2081-2
EXAMPLE – Determining Total Load and Maximum Working Radius From Lower Boom Point
DESCRIPTION WEIGHT (lb)
Component Weights
1 Fixed Jib
(see Jib Deduct table in capacity chart) 6,400
2 Load Block/Hook and Weight Ball (below jib point) 2,825
3 Upper Boom Point
(from capacity chart if noted) Does Not Apply
4 Load Block/Hook and Weight Ball
(below upper boom point) Does Not Apply
5 Load Block/Hook and Weight Ball
(below lower boom point) 4,800
6
Total Weight of Slings and Other Lifting Equipment Below Jib Point,
Upper Boom Point, and Lower Boom Point 700
7
Total Weight of Wire Rope Below Fixed Jib Point, Upper Boom Point, and Lower Boom Point
(see Load Line or Wire Rope Specifications Chart for weight of wire rope per ft) 1,728
Totals
A Total Component Weights (
ADD items 1 – 7 above ) 16,453
B Weight of Load to be Lifted 50,000
C Total Load to be Lifted
(ADD A and B above) 66,453
D Maximum Working Radius (for Total Load to be Lifted from C above –— see correct capacity chart) 85 ft
For this example, an M-250 equipped
as follows has been used:
• B30.5 Capacity Chart
• 130 ft of #44 Heavy Lift Boom
• 40 ft of #132 Jib
• 60 U.S. Ton Block with 4-Part
Load Line Suspended 30 ft
below Jib Point
• 100 U.S. Ton Block with 4-Part
Load Line from Lower Boom
Point (full block travel)
• 50,000 lb Load from Lower
Boom Point
• 2.7 lb/ft Weight of Wire Rope.
Deduct from Capacities when
Jib is Attached
Jib Length Jib No. 132
40'
60'
80'
100'
120'
6,400 lbs
8,200 lbs
10,300 lbs
12,800 lbs
15,300 lbs
Boom
Lgth.
Feet
Oper.
Rad.
Feet
Boom
Ang.
Deg.
Boom
Point
Elev.
Feet
Capacity
Pounds
1
3
0
26
27
28
29
30
82.7
82.2
81.8
81.3
80.9
136.6
136.4
136.2
136.1
135.9
350,700*
348,700*
346,700*
337,400
378,300
32
34
36
38
40
80.0
79.1
78.2
77.3
76.4
135.5
135.1
134.6
134.2
133.6
285,800
259,100
236,600
217,600
201,200
42
44
46
48
50
75.4
74.5
73.6
72.7
71.7
133.1
132.5
131.9
131.2
130.5
186,900
174,400
163,300
153,500
144,600
55
60
65
70
75
69.4
67.0
64.5
62.1
59.5
128.7
126.5
124.1
121.5
118.5
126,100
111,300
99,300
89,400
81,000
80
85
90
95
100
56.9
54.2
51.3
48.4
45.3
115.3
111.7
107.7
103.3
98.4
73,800
67,600
62,200
57,400
53,200
105
110
115
120
125
42.0
38.5
34.7
30.5
25.6
92.9
86.7
79.7
71.5
61.5
49,400
46,000
42,900
40,100
37,600
A922
1
7
2
3
4
7
7
5
6
1
D
B
395143