Choose a rope
There are many types of ropes for many different purposes. Consult always the manager, who will recommend the best specific products to cover properly your needs. Rombull Ronets counts with qualified professional staff to make this possible. When there is any risk or danger, for either people nor property, many facts have to be known. Make sure that the used rope is the proper specific one for the work to be done, that its size and width is the correct, check out the specifications on its label.
The different prime materials and many rope configurations make, not every rope have the same resistance. All cordage manufactured in Rombull Ronets counts with a label with information about the breaking load that the rope will support. We obtain the breaking load of a product with a calibered dynamometer, in the laboratory, under specific conditions when the rope reaches the point of fracture. For the use of ropes a safety grade in between 5 and 12 must be applied, depending on its applications and use conditions. We also have to know that knots will weaken the rope and decrease its strength by as much as 65%. Big ranges in safety facts have to be used when:
• Load is not precisely known.
• Workers have no experience or are not properly trained.
• Inspections are not frequent.
• There is abrasion, cuts or dirtiness.
• Impact or dynamic loads are probable.
• High temperatures or chemical agents are present.
• Tension in the ropes is going to be held indefinitely
• There is an accident risk, with negative consequences for persons or the value of materials.
• Pullies with very closed curves are going to be used.
• Knots that can affect the rope resistance are done.
Another aspect that has to be taken into account is when it ́s going to support dynamic impacts from suspended loads, this fact can increase the value of the load by two,three or even sometimes more. Whenever there is a risk for people, we must use ropes under extreme safety precautions.
Comparative characteristics of the fibers
1 Tenacity: is the measurement of the resistance of the fibers to breaking.
2 Elongation refers to the percentage of elongation of the fibers at break.
3 Coefficient of friction: is based on reluctance to slip or slide
4 Critical temperature: it refers to the point at which degradation is caused by temperature it self.
Types of rope by construction
Braid: The process to produce rope or textile structure formed by a braiding process in “V” form, The interwining of strands in a briding process to produce a rope structure.
Twisted: The number of turns about the axis applied to a fiber, yarn, strand or rope over a given length to combine the individual elements into a larger and stronger structure.
Cord: A small braided item of cordage, usually less than 4mm of diameter.
Rope: A rope is a length of fibres, twisted or braided together to improve strength for pulling and connecting.
Core: A textile product (yarn, strand, small diameter rope etc.) placed in the center of a rope and used as a support for the strands around it.
Rope with core: Twisted or braided rope used as an element of subrope of a parallel structure.
Double braided rope: Two ropes in one, a braided core is over-braided with a cover braid, hence the terms braid on braid and 2 in 1 braid. / Exceptionally strong rope construction of a core braid containing within an outer braided jacket.
Parallel core rope: Specialized construction consisting of parallel fiber core wrapped with a double layer and covered with a braided jacket.
Twisted rope: The number of turns about the axis applied to a fiber, yarn, strand or rope over a given length to combine the individual elements into a larger and stronger structure.