154HC Mast Section How to determine the service life of the tower crane, how big is its real life
According to the GB5144 "Safety Regulations for Tower Cranes", the normal use of the main bearing structure of the tower crane should not exceed 1.25 × 10s working cycles. The rough estimate is about 8 to 10 years. According to the "Tower Suspension Design Code", the tower crane designed for this type of work cycle is of a lower grade and can only work under most medium loads and less maximum loads. In reality, most tower hoists on the market do not specify the design life of the product on the information provided to users such as instructions. How to determine the service life of the tower crane? What is the true life span of a tower crane?
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The use of Tower hoist shows that in recent years, there have been more fatigue cracks in tower hoist steel structures using more than 10 years and less than 80 TM. At the same time, more and more fatigue cracks have been found in the steel structure of the tower crane that has been used for about 5 years. Some fatigue cracks were discovered in time, corresponding remedial measures were taken, and a few were not found, resulting in major accidents. Most of the cracks occur at the top and bottom of the tower and the bottom of the tower.
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