ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
Winch Deck Bolt MCD Calculation Worksheet
2
Password to unlock spreadsheet: Sikuliaq
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
WINCH WITH FAIRLEAD
WINCH WITHOUT FAIRLEAD
38
39
Figure 1: Winch Definition
40
41
42
INPUT DATA (refer to Figure 1)
43
44
ENTER LENGTH OF THE WINCH FOUNDATION, L72inches(1)
45
ENTER LONGITUDINAL POINT OF ACTION, X16.256inches(2)
46
ENTER HEIGHT OF POINT OF ACTION, H66.34inches(3)
47
ENTER MAXIMUM INCLINATION OF WIRE ROPE, q36degrees(4)
48
ENTER WEIGHT OF WINCH without wire, W5600lb(5)
49
50
ENTER WIRE ROPE SPECIFICATION:9.98 mm OD Triaxus Type A305382 Cable
51
ENTER MINIMUM BREAKING STRENGTH OF WIRE ROPE15961lb(6)
52
53
ENTER WIRE LOAD
54
1.5 ´ Minimum Breaking Strength from Line (6), P23942lb(7)
55
[Reference: 46 CFR, Subchapter U, §189.35-9(c)(1)]
56
57
BOLTS IN TENSION
58
ENTER THE DESIGN TENSILE CAPACITY OF WINCH
59
FOUNDATION BOLTS, Cσ
60
(must be 7,000 pounds or less)7000lb(8)
61
62
ENTER THE YIELD TENSILE CAPACITY OF WINCH
63
FOUNDATION BOLTS, Yσ
64
(must be 1.67 ´ Cσ or less)11690lb(9)
65
66
BOLTS IN SHEAR
67
ENTER THE DESIGN SHEAR CAPACITY OF WINCH
68
FOUNDATION BOLTS, Cτ
69
(should be 0.577 ´ Cσ or less)5880lb(10)
70
71
ENTER THE YIELD SHEAR CAPACITY OF WINCH
72
FOUNDATION BOLTS, Yτ
73
(must be 1.67 ´ Cτ or less)9700lb(11)
74
75
ENTER THE UNIT WEIGHT (in air) OF THE WIRE ROPE0.2614lb/ft(12)
76
ENTER THE LENGTH OF WIRE SPOOLED ON WINCH DRUM17582feet(13)
77
ENTER THE WIDTH OF THE WINCH FOUNDATION72inches(14)
78
79
80
CALCULATE MINIMUM NUMBER OF BOLTS
81
Part 1: Calculation of Minimum Number of Tensile Bolts for Horizontal Pull
82
83
84
85
86
Where Nσ1 is the minimum number of Tensile Bolts for Horizontal Pull
87
88
Multiply Wire Load by Height of Point of Action,
89
PH = Line (7) ´ Line (3)1588279lb-in(15)
90
91
Divide Line (15) by Length of Base,
92
PH/L = Line (15) / Line (1)22059lb(16)
93
94
Enter one-half of the Weight of the Winch,
95
W/2 = 0.5 ´ Line (5)2800lb(17)
96
97
Subtract Line (17) from Line (16); If negative, enter zero,
98
PH/L - W/2 = Line (16) - Line (17)19259lb(18)
99
100
Divide Line (18) by Line (9) and enter the whole number