Why Rope-end Terminations?
Rope end 'termination' options:
There are three common methods to terminate a rope:
Knots are popular because they are inexpensive to produce. However, knots do have some serious limitations particularly when used for personal protection and in adverse work environments.
- Knots rely solely on the knowledge, and skill of the person tying the knot; human error plays a significant role in all height safety accidents
- Knots are bulky and cumbersome, often interfering with the functionality of associated equipment and hardware
- Knots significantly reduce the break strength of the rope to which the knot is applied (typically up to 50% of the rope strength)
Spliced Terminations by an unqualified splicer:
Splicing, more art than science, is a time consuming, hand-process relying heavily on the skill of the individual splicer for safe completion.
Climbing or rigging lines, spliced correctly, do run smoothly and are compatible with other components in the system or configuration therefore there is a need for them in many industries. but, like knots, the quality of the splice is totally dependent on the knowledge and skill of the splicer.
Splicing break-test results often show considerable variation, dependent totally on the individual splicers ability, and their 'on the day' distraction while completing the task.
Without possessing a significant depth of knowledge on the subject, a spliced rope is also difficult to accurately access for quality control.
Quality control and the time it takes to produce each splice, coupled with inconsistent break-test results when a splice is created by someone without the correct procedures in place make this form of termination unacceptable for many companies particularly where human life is at risk.
Spliced Terminations by Shift 2:
The Owner and Splicer (Anna) at Shift 2 has the Yale certification for rope splicing. This certification is to be done yearly to maintain a high standard of splicing.
Anna also holds the French Cousin Trestec certification for their double braid Atrax splice. This is a custom splice designed by Cousin Trestec to fit through mechanical devices.
On top of that Shift 2 sends splices out for testing on regular occasions to two independent facilities, as well as batch testing on our own test bed when ever we are doing a run on a particular rope. - See here for more information Testing Facilities
Anna has a depth of knowledge when it comes to ropes and follows a strict procedure when dealing with rope splicing to ensure that each and every splice is consistently up to the highest of international standards.
In contrast to knots and splicing, CNC sewn rope-end terminations are consistent in the manufacturing process and produce minimal variations in test-break results, adding overall confidence and security for companies dependent on ropes for PPE.
Almost all ropes 8 - 16mm in diameter can be terminated with a CNC stitch. However there are a growing number of technical climbing and rigging lines that simply cannot be spliced - a sewn termination or knot is the users only option.
Sewn rope terminations also allow for the introduction of hardware (eg thimbles) into the 'eye' to help reduce chafing and wear in adverse environments.
Shift 2 uses UV and chemical resistant bonded polyester yarns manufactured in the USA specifically for stitching personal protection cordage and ropes.
“It's the only thing I haven't broken on shock load - and I break everything! ”
Gareth Wood - Arbor Technix