Section 2 Fittings
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Code for Lifting Appliances in a Marine Environment, July 2022 - Chapter 8 Fittings, Loose Gear and Ropes - Section 2 Fittings

Section 2 Fittings

Parent topic: Chapter 8 Fittings, Loose Gear and Ropes

2.1 Gooseneck and derrick heel assemblies

2.1.1 The safe working load of the gooseneck and derrick heel assembly is to be taken as the least of the values determined separately for the gooseneck pin, the derrick heel lugs and the derrick heel crosspin. Standard dimensions for these items and for the gooseneck bearing bracket, with corresponding safe working loads, are given in Table 8.2.1 Dimensions of gooseneck pins and the items are illustrated in Figure 8.2.1 Gooseneck pins.

Table 8.2.1 Dimensions of gooseneck pins

Boom axial thrust, in tonnes Straight pins Cranked pins        
d 1 l1 d 1 l1 e d 2 r t
1,6 50 60 — — — 24 25 26
2,0 50 60 — — — 26 25 28
2,5 60 60 55 60 35 29 30 30
3,2 70 85 60 65 38 32 35 33
5,0 70 70 65 70 40 35 35 36
5,0 80 85 70 80 46 41 40 40
6,3 90 100 80 85 49 44 45 45
8,0 100 105 90 90 52 47 50 50
10,0 110 120 100 100 58 54 55 57
12,5 120 125 110 105 61 58 60 64
16,0 140 150 120 110 64 67 70 73
20,0 155 170 130 115 67 75 75 82
25,0 170 200 140 125 72 79 80 92
32,0 190 210 155 140 78 83 85 102
40,0 190 220 170 155 85 93 95 112
50,0 200 220 — — — 103 100 124
63,0 225 245 — — — 113 113 140
80,0 250 275 — — — 129 125 150
100,0 275 290 — — — 144 138 160

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.1 Gooseneck pins.

Note 2. Straight gooseneck pins for axial thrusts exceeding 20 t are generally tapered, see Ch 8, 2.1 Gooseneck and derrick heel assemblies 2.1.4.

Table 8.2.2 Dimensions of derrick heel assemblies

Boom axial thrust, in tonnes a b c r t d 2 d crosspin
1,6 32 80 28 25 16 24 22
2,0 35 90 30 28 16 26 24
2,5 45 107 32 30 22 29 27
3,2 50 112 35 32 22 32 30
4,0 50 120 38 35 25 35 33
5,0 55 135 42 42 25 41 39
6,3 60 145 47 45 32 44 42
8,0 65 153 53 48 32 47 45
10,0 70 173 60 55 40 54 52
12,5 75 188 67 60 40 58 56
16,0 85 208 76 68 45 67 64
20,0 95 235 85 75 50 75 72
25,0 100 260 95 80 60 79 76
32,0 105 270 105 85 70 83 80
40,0 115 300 115 95 70 93 90
50,0 125 325 127 105 80 103 100
63,0 135 340 144 115 80 113 110
80,0 160 350 154 130 100 129 125
100,0 175 370 164 145 100 144 140

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.2 Derrick heel assembly.

Note 2. Values of a and b may be adjusted for other forms of rib stiffening.

Table 8.2.3 Dimensions of gooseneck bearing brackets

Gooseneck pin
diameter, d 1 		a b c d 3 t 1 t 2
50 95 45 70 85 12 10
55 95 45 80 90 12 10
60 95 50 90 100 12 10
65 120 50 100 110 12 10
70 120 60 115 120 12 10
80 140 60 130 130 12 10
90 140 70 145 140 12 10
100 175 70 160 160 15 10
110 175 80 175 170 20 12
120 215 80 190 190 20 12
130 215 90 205 200 22 12
140 215 90 225 210 25 12
155 235 100 235 230 30 15
160 235 100 240 235 30 15
170 235 100 250 250 30 15
180 235 100 270 260 30 15
190 255 110 285 280 33 18
200 255 110 300 290 35 18
225 255 120 315 325 40 20
250 275 130 330 360 40 20
275 275 140 345 395 40 20

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.3 Gooseneck bearing.

Note 2. The width of bracket at the mast (dimension w in Figure 8.2.3 Gooseneck bearing) is to be not less than 0,67 times the diameter of the mast at that point.

Figure 8.2.1 Gooseneck pins

Figure 8.2.2 Derrick heel assembly

Figure 8.2.3 Gooseneck bearing

2.1.3 Where arrangements other than those covered by the Tables or by recognised Standards are proposed, the dimensions of the components of the assembly are to be such that the stresses given in Table 8.2.4 Stresses in gooseneck and derrick are not exceeded.

Table 8.2.4 Stresses in gooseneck and derrick

Item Boom axial thrust, T, in tonnes
  T ≤ 25
N/mm2 		25 < T ≤ 50
N/mm2 		50 < T
N/mm2
Gooseneck pin:      
  Bending plus direct stress 90 40 + 2T 140
  Bearing pressure 20 + 0,5T 20 + 0,5T 45
         
Derrick heel crosspin:      
  Shear stress 25 + 0,4T 35 35
  Bending plus shear stress 90 + T 90 + T 140
  Bearing pressure 20 + 0,5T 20 + 0,5T 45
         
Gooseneck pin collar:      
  Horizontal bearing pressure 10 N/mm2
  Minimum diameter 1,15d 1 mm
         
Bearing bracket Total stress in any part is not to exceed 0,45σy

2.1.4 Where a gooseneck pin is supported by two bearings, the diameter of the pin in way of the lower bearing may be reduced to 0,6d 1, provided the bearings are spaced such that (a + b) is greater than 3,0d 1, see Figure 8.2.3 Gooseneck bearing for illustration of these terms. Proposals for a greater reduction on large gooseneck pins will be specially considered.

2.2 Swivel bearing assemblies

2.2.1 The safe working load of the assembly is to be taken as the least of the values determined separately for the individual components. Standard dimensions for the trunnion, pin and bearing bracket with corresponding safe working loads are given in Table 8.2.5 Dimensions of swivels and Table 8.2.6 Dimensions of swivel bearing brackets and the items are illustrated in Figure 8.2.4 Swivel bearing assemblies.

Table 8.2.5 Dimensions of swivels

SWL, in tonnes a b d 1 d 2 d 3 r 1 t 1 d pin
2,0 75 90 34 65 25 25 22 32
4,0 95 110 42 80 33 33 30 40
6,3 110 130 47 90 42 43 40 45
8,0 120 150 52 100 48 48 45 50
10,0 130 170 57 110 52 55 50 55
12,5 140 190 62 120 56 60 55 60
16,0 150 215 68 130 65 65 60 65
20,0 170 240 78 150 74 70 65 75
25,0 180 270 83 160 78 75 70 80
32,0 190 300 93 180 86 85 80 90
40,0 210 330 103 200 96 95 90 100
50,0 235 380 113 220 106 105 100 110
63,0 260 410 123 240 116 115 110 120
80,0 295 480 134 260 131 135 125 130
100,0 330 540 144 280 146 148 140 140

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.4 Swivel bearing assemblies.

Note 2. SWL is the required SWL of the bearing assembly.

Table 8.2.6 Dimensions of swivel bearing brackets

SWL, in tonnes c d 1 e g h t 2 t 3 r 2
2,0 75 34 75 140 95 21 10 35
4,0 95 42 80 160 115 15 10 43
6,3 115 47 90 180 135 20 10 48
8,0 140 52 110 200 155 25 10 55
10,0 160 57 125 230 175 25 12 60
12,5 175 62 140 260 195 30 12 65
16,0 190 68 150 290 223 30 12 70
20,0 205 78 160 320 248 35 15 80
25,0 220 83 180 240 278 35 15 85
32,0 220 93 190 370 308 40 15 95
40,0 245 103 190 410 338 45 15 105
50,0 270 113 210 450 388 45 18 115
63,0 300 123 230 500 420 50 20 125
80,0 335 134 260 560 490 50 20 135
100,0 375 144 300 630 550 55 20 148

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.4 Swivel bearing assemblies.

Note 2. SWL is the required SWL of the bearing assembly.

Figure 8.2.4 Swivel bearing assemblies

2.2.3 Where arrangements other than those covered by the Tables or by recognised Standards are proposed, the dimensions of the components of the assembly are to be such that the stresses given in Table 8.2.7 Stresses in swivel bearing assemblies are not exceeded.

Table 8.2.7 Stresses in swivel bearing assemblies

Item Safe working load, in tonnes
  SWL ≤ 25,
N/mm2 		25 < SWL,
N/mm2
Swivel pin:    
  Shear stress 25 + 0,4 SWL 35
  Bearing pressure 40 + 0,6 SWL 55
       
Trunnion eyeplate:    
  Shear pullout at hole 50  
  Bearing bracket Total stress on any part is not to exceed 0,45σy

Note Safe working load is the required SWL of the bearing assembly

2.3 Fixed eyeplates

2.3.1 Fixed eyeplates at the derrick boom head are generally to be in accordance with the dimensions given in Table 8.2.8 Dimensions of fixed eyeplates at the derrick boom head

Table 8.2.8 Dimensions of fixed eyeplates at the derrick boom head

SWL, in tonnes Oval eye
a 		Round eye
b 		e 1 t 1 d r 2 e 2 t 2
2,0 50 27 50 25 25 25 40 22
2,5 55 29 54 25 27 28 40 25
3,2 66 33 57 30 30 30 45 28
4,0 77 36 65 35 33 33 50 30
5,0 87 41 70 40 39 38 55 35
6,3 91 45 75 40 42 43 60 40
8,0 101 51 80 50 48 48 70 45
10,0 117 56 90 50 52 55 75 50
12,5 128 61 100 60 56 60 80 55
16,0 145 67 115 60 65 65 85 60
20,0 157 73 125 70 74 70 95 65
25,0 170 80 135 80 78 75 100 70
32,0 194 88 150 90 86 85 110 80
40,0 220 98 170 100 96 95 120 90

Note 1. All dimensions are given in millimetres and are illustrated in Figure 8.2.5 Fixed eyeplates at the derrick boom head.

Note 2. The dimensions e 1 and e 2 are to be measured from the outside surface of the derrick boom tube, or the outside surface of the doubling plate, if fitted.

Figure 8.2.5 Fixed eyeplates at the derrick boom head

2.3.2 The dimensional details of the fittings may differ at opposite ends depending on the loads to be carried. Where the fitting is made continuous and of the larger thickness required by the Table, care is to be taken to ensure that this thickness is suitable for the proposed shackle or other attachment to the eyeplate.

2.3.3 It is highlighted that an increase in the dimension e1 or e2 will result in an increased bending moment on the derrick boom and this may result in increased scantlings.

2.3.4 Fixed eyeplates attached to the ship’s structure for use with the cargo gear are to have dimensions generally in accordance with Table 8.2.9 Dimensions of eyeplates at ship's. Attention is to be given to the stresses which may arise from applied forces not in the plane of the eyeplate. Where the dimensions of the eyeplate differ from the Table values, the safe working load may be taken as:

where

dimensions a, b, d and t are illustrated in Figure 8.2.6 Fixed eyeplate at the ship's structure.
Where the cross-section of the eyeplate varies, the minimum value of (d x t) is to be used for the calculation.

Table 8.2.9 Dimensions of eyeplates at ship's

SWL, in tonnes a b d t
1,0 35 22 16 16
1,6 42 24 20 20
2,0 50 27 25 25
2,5 55 29 25 25
3,2 66 33 30 30
4,0 77 36 35 35
5,0 87 41 40 40
6,3 91 45 40 40
8,0 101 51 50 50
10,0 117 56 50 50
12,5 128 61 60 60
16,0 145 67 60 60
20,0 157 73 70 70
25,0 170 80 80 80
32,0 194 88 90 90
40,0 220 98 100 100
50,0 240 108 110 110

Note All dimensions are given in millimetres and are illustrated in Figure 8.2.6 Fixed eyeplate at the ship's structure.

Figure 8.2.6 Fixed eyeplate at the ship's structure

2.3.5 Adequate support is to be provided by the ship structure in way of the eyeplate. Arrangements to give effective spread of the load into the surrounding structure may be required, see also Ch 2, 8.9 Deck eyeplates.

2.4 Built-in sheaves

2.4.1 Where a built-in sheave is fitted in the derrick boom, the diameter of the sheave is to be not less than that required for the rope nor less than 1,2 times the derrick boom diameter at that point. The material, construction and design of the sheave, sheave pin and supports are to be in accordance with Ch 8, 3 Blocks.

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