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One of the most important stages of testing any lifting equipment – whether it’s a tower crane or a Hiab truck-mounted crane – is Proof Load Testing.
What is Proof Load Testing? Proof Load Testing, sometimes known as overload testing, is a process where a load that is higher than the stated load capacity is applied to a crane. At Condor Test Weights we work out the exact proof load weight to use from the safe working load (s.w.l). We multiply the s.w.l by 125% to find the weight we should apply during our tests. Why Do You Need to Do an Overload Test? Our primary concern when undertaking all testing is that your lifting gear is fit for action. Proof Load Testing allows us to see more than simply testing under normal conditions will allow. 1. Overload testing will confirm that your crane is capable of lifting its stated capacity. The additional weight compensates for dynamic and static loading as you pick the load. 2. These tests can expose stresses and strains in the structure of your crane that testing with just the s.w.l would not. 3. It confirms that if loads above the s.w.l are applied to your lifting gear accidentally, your crane will be able to withstand the extra weight. Will You Need To Do Proof Load Tests Often? No. LOLER does not require Proof Load Testing at regular intervals, and we do not want to put extra strain on your crane unnecessarily. We carry out these tests before you use your lifting gear for the first time, and will normally repeat them after major modifications to your crane. Our staff have a wide knowledge of Proof Load Testing and other issues relating to crane tests. If you have any questions or concerns, get in touch. |
Proof Load Testing |