Wanted to ask you as folk involved in welding and steels about your experience rigging and work with ropes. Worked on construction sites here in UK and used some rigging skills.
All my rigging refs. from North America.
Just been pointed to a great publication from Ontario (thanks, Private) Construction Safety Association of Ontario - Hoisting and Rigging Safety Manual Also have: BC, Canada - the Boilermaking Manual From USA - books: Cranes and Derricks - Howard Shapiro, Jay P. Shapiro, Lawrence K. Shapiro Handbook of Rigging - Joseph A. MacDonald, W. A. Rossnagel, Lindley R. Higgins TM 5-725 Rigging-1968 - Dept of the Army Technical Manual
I've got these questions about rope use over there. I've had these "better rope" arguments put to me which I think are wrong.
Nylon rope or polypropylene (PP) rope?
You can obtain the strength you need with a bigger diameter PP rope - which would make it easier to handle. Advantage PP for the up-to-200kg (440lb) weights of steels which are manually movable? The PP dead-breaks in overload on horizontal hauls - never seen the claimed dangerous elastic break of a Nylon rope, but told you don't want to be near. Then cost - in the real world, because PP is much cheaper, you can replace it much more readily as it accumulates wear or any other question-marks over its properties.
Braid or 3-strand laid?3-strand has the advantage that you can twist open the lay - which means there is no part of the rope's structure you cannot inspect. Whereas braid - most of the strength is in the core (?) but you can only see the surface. And strength you get from a bigger more handleable rope. So I reckon advantage 3-strand in the harsh conditions with mishaps (eg run-over by vehicles, burns) of construction site use - where need to be able to inspect your rope frequently. And even more so cost - cheap PP 3-strand can be easily replaced if there are any question-marks over its servicability even given its inspectability.
That means that the cheapest most rough-and-ready "rope" is what you want to be using. ???
Then - 3-strand - you can splice it using the classic techniques - of which the eye-splice makes an end termination preserving 100% of the strength of the rope - very useful
(tensile testing shows this - plain rope between two terminating eye-splices breaks in mid-length not near eye-spliced ends:
Last question - what do you have to do to "test" your ropes? Visual inspection? Do you dead-load test your ropes?