ISO 13729-2012 Closed Chock
Description:
The closed chock is a type of ship’s mooring and towing fitting installed on the ship side to lead the mooring and towing rope from the ship’s inboard to outboard. The closed chocks are normally adopted for ships which use wire ropes. The radius of chock surface was designed based on the bending ratios of rope through the chock, it will not less than twelve times of the wire rope diameter.
Classification:
The closed chock can be classified by it’s installation site as follows:
-- Type A -Deck mounted closed chock;
-- Type B -Bulwark mounted closed chock.
Drawing of ISO 13729-2012 Type A Closed Chock:
If you need ISO 13729-2012 Type A Closed Chock with base, please contact us.
Parameters of ISO 13729-2012 Type A Closed Chock:
Nominal size
L*H*D
l1
l2
l3
l4
H1
H2
H3
R
R1
R2
R3
R4
R5
R6
d1
T
Calculated
weight
(kg)
250*200*214
488
453
76
265
427
368
108
100
219
160
108
86
150
128
108
22
73
300*250*286
614
565
89
330
551
481
144
125
282
212
144
118
180
154
144
26
142
350*250*333
716
660
114
403
601
525
168
125
308
232
168
138
200
170
168
30
222
400*250*381
820
754
139
475
652
553
192
125
335
236
192
156
250
214
192
36
310
450*250*381
870
804
164
524
652
553
192
125
335
236
192
156
250
214
192
36
322
500*250*381
920
854
189
574
652
553
192
125
335
236
192
156
250
214
192
36
337
400*250*428
870
796
139
500
701
609
216
125
360
268
216
178
250
212
216
38
434
450*250*428
920
846
164
550
701
609
216
125
360
268
216
178
250
212
216
38
452
500*250*428
970
896
189
600
701
609
216
125
360
268
216
178
250
212
216
38
472
500*400*428
970
896
176
600
851
759
216
200
435
343
216
178
250
212
216
38
528
500*250*525A
1068
1000
190
652
798
675
264
125
409
286
264
224
320
280
264
40
657
500*400*525A
1068
1000
193
652
948
825
264
200
484
361
264
224
320
280
264
40
724
500*250*525B
1074
1000
176
652
801
680
264
125
412
291
264
218
320
274
264
46
753
500*400*525B
1074
1000
179
652
951
830
264
200
487
366
264
218
320
274
264
46
825
Parameters of ISO 13729-2012 Type B Closed Chock:
Nominal
size
L*H*D
l1
l2
H1
H2
R
R1
R2
R3
R4
R5
R6
d1
d2
T
θ
Calculated Weight(kg)
250×200×214
516
441
466
306
100
233
153
108
96
150
138
108
80
12
44°
49
300×250×286
638
554
588
410
125
294
205
144
128
180
164
144
100
16
44°
100
350×250×333
736
646
636
449
125
318
224.5
168
150
200
182
168
120
18
55°
141
400×250×381
834
736
684
450
125
342
225
192
172
250
230
192
120
20
47°
184
450×250×381
884
786
684
450
125
342
225
192
172
250
230
192
120
20
47°
194
500×250×381
934
836
684
450
125
342
225
192
172
250
230
192
120
20
47°
202
400×250×428
882
778
732
515
125
366
257.5
216
194
250
228
216
120
22
56°
264
450×250×428
932
828
732
515
125
366
257.5
216
194
250
228
216
120
22
56°
276
500×250×428
982
878
732
515
125
366
257.5
216
194
250
228
216
120
22
56°
288
500×400×428
982
878
882
665
200
441
332.5
216
194
250
228
216
120
22
56°
311
500×250×525A
1078
976
828
551
125
414
275.5
264
240
320
296
264
120
24
53°
379
500×400×525A
1078
978
978
701
200
489
350.6
264
240
320
296
264
120
24
53°
408
500×250×525B
1078
976
828
554
125
414
277
264
238
320
294
264
120
26
53°
405
500×400×525B
1078
978
978
704
200
489
352
264
238
320
294
264
120
26
53°
442
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