This International Standard specifies, for ropes of different
kinds, a method of determining each of the following
— linear density;
— lay length;
— braid pitch;
— breaking force.
The linear density, lay length and braided pitch are measured
with the rope under a specified tension called the reference
tension, as specified in Annex A.
The elongation corresponds to the measured increase in length of
the rope when the tension to which it is subjected is increased
from an initial value (reference tension) to a value equal to 50 %
of the minimum specified breaking strength of the rope.
The breaking force is the maximum force registered (or reached)
during a breaking test on the test piece, carried out on a tensile
testing machine with constant rate of traverse of the moving
element. The breaking force values given in the tables of rope
specifications are only valid when this type of testing machine is
When it is not possible to test the whole section of rope, the
method described in Annex B can be used, subject to agreement
between the parties involved.
This International Standard also provides a method for measuring
water repellency, lubrication and finish content, and heat setting
treatment, when requested by the customer.
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