The weakest point in the line is the knot or slice.
Breaking strength of 3 16 wire rope.
Knots and splices will reduce the breaking strength of a line by as much as 50 to 60 percent.
Rope diameter minimum breaking strength safe load safety factor 12 weight in mm lb f kn lb f kn lb m ft kg m 3 16.
It is recommended not to exceed 1 3 3 1 design factor of the rope s strength to maintain a useful service life.
Industrial wire rope 7390 harrison avenue cincinnati ohio 45247 888 345 0919.
Aircraft grade wire rope.
The same standard requires a design factor of 5 0 for rotation resistant ropes.
This general purpose aircraft grade braided wire cable is designed for strength and flexibility.
The mbf of starlift xtra is such.
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Asme b30 5 mobile and locomotive cranes requires a design factor of 3 5 for 6 strand hoist ropes.
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With a 3960 lb.
6 x 19 iwrc wire rope.
This would put you into 5 16 cable.
Maximum load capacity the wire.
6x19 class wire ropes with 15 26 wires per strand.
Just being able to calculate breaking strength doesn t give one a safety margin.
6x37 class wire ropes with 27 46 wires per strand.
Charles missouri 63303 866 852 9714.
2 5 x 1 57 2 x 900 5 546 pounds of breaking strength.
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6x19 class improved plow steel.
Rope diameter minimum breaking strength safe load weight in mm lb f kn lb f kn lb m ft kg m 1 4.
So if you want a 1700 lbs working load limit wll take that number x 5 which 8500.
However a splice is stronger than a knot.
These are the listed breaking strengths of each rope type and size.
2086 exchange drive st.
These wire ropes come in fiber core or iwrc variations with diameters ranging from to 1 1 3 and tensile strengths of 2 74 tons to 69 4 tons.
General purpose aircraft grade braided wire rope 12 99.