Tracing back its origin to the 1830s, wire ropes were first developed for mining hoist applications. It is made up of several metal wire strands twisted in the shape of a helix. Nowadays wire ropes are used for lifting and hoisting in elevators and cranes, and for mechanical power transmission. As premium wire rope manufacturers, Saudi Dutest aims to provide the best quality lifting products which can withstand extreme environments and treatments.
Finding the right wire rope for certain esoteric applications is extremely important for a successful construction project. For the safe working load of wire rope, there are some ways to determine the breaking strength of the rope which can be tested before application. Here are some common ways to measure the breaking strength of wire rope.
Materials: Wire ropes are made of galvanized steel or aluminum and compressed zinc to reduce the effects of corrosion. Aluminum wire ropes are generally stronger than steel and can be used for all rigging, maritime, mooring, and towing rope application. They can also stand up against the corrosive influence of seawater.
The coating of the ropes can also determine the level of strength of the wire rope as it protects the inner cable from fraying. Nylon coated ropes can hold up well in high-friction applications that expose them to heat. Vinyl coatings are often applied in the form of a PVC sheath. Construction sites and the mining industry also opt for bright vinyl coating to enhance safety. The construction of rope lay, and rotation resistance will also measure the strength of the wire rope.
Manufacturer’s certification: The sturdiness of wire rope is also dictated by manufacturer’s certification of published dimensions and information regarding the structure of the wire rope. All ropes of the same size, grade and core offer similar minimum breaking force characteristics and weight per foot, despite differences in the construction type and material used. Consider consulting a wire rope guide to check for wire rope strength and have assistance in the installation process for special tasks.
Working load limit: Staying within the working load limit is an important aspect to check to prevent overloading cables. Minimum breaking strength indicates the smallest load that will pull a piece of wire rope apart. Aggregate strength refers to the collective breaking strength of all the wires in a single cable when they are tested individually. To calculate the working load limit, divide the tensile strength by the design factor. The number you get is the maximum working load you can apply without risking tensile failure.
Formula: Ultimate Breaking Strength / 5 = WLL (Working Load Limit)
Saudi Dutest is one of the recognized wire rope suppliers in Saudi Arabia who represent premium quality CASAR wire ropes in Saudi Arabia.
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