Static tests of the crane are conducted under the load, which is 25% above its capacity parameters according to the standard test methods.
Static tests of the jib-type crane having one or more load characteristics are periodically held in a position corresponding to a maximum load lifting capacity of the crane and / or the largest loading moment.
When static tests of jib-type cranes are carried out, the boom must be installed relatively to the leading substructure in the position corresponding to the lowest rated stability of the crane. The load must be lifted to a height of 100-200 mm.
If the lifted load does not fall on the ground within 10 min, and there is no cracks, permanent deformations or other damages of metal structures and mechanisms, than the crane positively passed the test.
Static and dynamic testing of cranes.
Static tests performed crane load, 25% above its nameplate load capacity. Dynamic load test is performed, 10% greater than the capacity of the crane, or a work load, ie. the cargo, which is equal to the mass of the crane lifting capacity. The dynamic test work load makes it easier to hold for heavy-duty cranes. The dynamic test shall be performed only in case of positive result of the static test. In the dynamic test is checked under a load of action mechanisms of the crane and its brakes.
In the dynamic test shall be repeated raising and lowering of the load, as well as the verification of the actions of all the other mechanisms of the crane. The main conditions for this test are the same as static. For example, for cranes equipped with two or more lifting mechanisms should be tested each mechanism; wherein the magnitude of the load is determined depending on the operating conditions
Dynamic tests of the crane are carried out by lifting a load, which is 10% heavier than its nominal capacity, and are intended to check the work of mechanisms and brake