Proof Load Testing of Lifting Equipment

Yield strength is a material property describing the highest internal stress in a material that an item could achieve without permanently deforming.

Ultimate strength describes the internal stresses at a load that would cause failure.

Almost all codes require an engineer to use the yield strength for design except in cases like fall protection. In this scenario, it is common to see ultimate strength used in conjunction with a high loading scenario and the requirement to re-inspect after it's been loaded. It is important to keep in mind that many high tensile materials such as quenched, tempered or high carbon steels have a narrow band between yield, ultimate and transition causing permanent bending to breaking very quickly.


Polypropylene rope

Polypropylene ropes are synthetic and possess a variety of unique qualities. Polypropylene rope is particularly suited for use around water and will not rot due to water and is resistant to mildew. This rope is also produced in a variety of colours making it a common choice for barriers at golf courses, parks or even power plants. Because polypropylene floats, it is used to designate swimming lanes in pools.

Polypropylene rope is the most popular all-purpose rope for the average consumer. It is a high quality, light-weight rope that is affordable and very functional. It has great working qualities and appearance. Polypropylene rope is rot resistant and floats, making it very popular for water sports and markers.

Our standard polypropylene is yellow, and larger diameters come with a blue tracer. We also offer some colour options like black, blue, and white. Want the manila look but with a longer service life? Our Tan Polypropylene rope has the same working conditions as industry polypro, but is used to imitate the rustic appeal of natural fibre manila.
Observe the qualities available, as some diameters offer a variety of lengths to choose from. Note the tensile strengths that are provided. For the larger diameters, feel free to contact us for any custom cut lengths.