Polypropylene Fiber Ropes - Strengths

Polypropylene fiber 3-strand and 8 strand rope - minimum breaking strength and safe load calculator. Calculate safe loads and masses for various rope diameters.

Calculator

Inputs

Rope Diameter

Safety Factor

Results

Minimum Breaking Strength-- lbf

Safe Load (Safety Factor 12)-- lbf

Safe Load-- kN

Maximum Safe Mass-- kg

Weight per Length-- kg/m

Rope Diameter (in)	Min Breaking Strength (lbf)	Safe Load (lbf)	Safe Load (kN)	Weight (kg/m)
1/4	1125	94	0.417	0.02
5/16	1710	143	0.634	0.03
3/8	2430	203	0.90	0.04
7/16	3150	263	1.17	0.05
1/2	3780	315	1.40	0.07
9/16	4590	383	1.70	0.09
5/8	5580	465	2.07	0.11
3/4	7650	638	2.84	0.15
7/8	10350	863	3.84	0.21
1	12825	1070	4.76	0.27
1 1/16	14400	1200	5.34	0.30
1 1/8	16000	1330	5.92	0.34
1 1/4	19350	1610	7.16	0.41
1 3/8	21150	1760	7.83	0.45
1 1/2	27350	2280	10.1	0.59
1 5/8	31950	2660	11.8	0.68
1 3/4	36900	3080	13.7	0.79
2	46800	3900	17.3	1.03