Breaking Loads

Breaking Loads – TENSILE GRADE 1770N/MM2 7×7 Wire Core

A similar rope to 6×7 but the fibre core is replaced by a wire strand, resulting in a greater resistance to crushing and added strength, lacks flexibility on larger diameter ropes.

Size Dia (mm)	Appoximate Mass (Weight 100/Kgs)	Minimum Breaking Load (Tonnes)	Approximate SWL (FOS 5:1 kgs)
1
1.5	0.90
2	1.52	0.276	55
2.5	2.2
3	3.43	0.54	108
4	6.1	0.960	192
5	9.53	1.5	300
6	13.7	2.16	492
7	19.5	3.15	630
8	25.5	4.11	822
9	32.2	5.2	1.00
10	39.8	6.42	1.20
11	48.2	7.77	1.50
12	57.3	9.25	1.80

TENSILE GRADE 1770N/MM2 7 x 19 Wire Strand Core

A similar rope to 6×19 but the Fibre Core is replaced by a wire strand
resulting in less flexibility but a slightly higher breaking strain and better resisance to crushing

Size Diameter (mm)	Approximate Mass (kg/100M)	Minimum Breaking Load (Tonnes)	Approximate SWL (kgs FOS 5:1)
2	1.49	0.24	48
2.5	2.4	0.37	74
3	3.43	0.54	108
4	6.1	0.96	192
5	9.53	1.50	300
6	13.7	2.16	432
7	19.5	3.15	630
8	25.5	4.11	822
9	32.2	5.2	1.0
10	39.8	6.42	1.2
11	48.2	7.77	1.5
12	57.3	9.25	1.85
13	67.3	10.8	2.16
14	78	12.6	2.5
16	102	16.4	3.2
18	129	20.8	4.1
19	144	23.1	4.6
20	159	25.7	5.1
22	193	31.1	6.2
24	229	37	7.4
26	269	43.4	8.6
28	312	50.4	10.00
32	408	65.7	13.1

TENSILE GRADE 1770 N/MM2 6X19 Fibre Core

This rope is widely used for General Purpose Engineering, It has good strength and flexibility with reasonably good resistance to abrasion and crushing.

Size Dia (mm)	Approximate Mass (Weight kgs/100M)	Minimum Breaking Load (Tonnes)	Approximate SWL (FOS 5:1 kgs)
2	1.39	0.239	47
3	3.11	0.500	100
4	5.54	0.890	178
5	8.65	1.39	278
6	12.5	2	400
7	17.7	2.92	584
8	23.1	3.81	762
9	29.2	4.82	964
10	36.1	5.95	1.1
11	43.7	7.21	1.4
12	52	8.57	1.7
13	61	10.1	2
14	70.8	11.6	2.3
16	92.4	15.3	3
18	117	19.3	3.8
19	130	21.5	4.3
20	144	23.9	4.7
22	175	28.8	5.7
24	208	34.3	6.8

6 x 7 Fibre Core this construction has good strength & maximum resistance to abrasion

Size Dia (mm)	Approximate Mass (Weight Kgs/100M)	Minimum Breaking Load (Tonnes)	Factor of Safety (Approximate SWL 5:1 kgs)
2	1.38	0.24	48
2.5	2.0	0.37	74
3	3.11	0.54	108
4	5.54	0.96	192
5	8.65	1.50	300
6	2.15	2.16	432

6×36 IWRC galvanised wire rope Tensile grade 1770N/MM2 Also offered in 1960 grade

Size Diameter (mm )	Appoximate Mass (Weight 100/Kgs)	Minimum Breaking Load (Tonnes)	Approximate SWL (FOS 5:1)
8mm	25.5	4.11	0.822
9mm	32.2	5.2	1.04
10mm	39.8	6.42	1.28
11mm	48.2	7.77	1.55
12mm	57.3	9.25	1.85
13mm	67.3	10.8	2.16
14mm	78	12.6	2.52
16mm	102	16.4	3.28
18mm	129	20.8	4.16
19mm	144	23.1	4.62
20mm	159	25.7	5.14