Reason tower crane standard section cracks and how to respond

Tower crane tower in part by a chassis base section, reinforce highly festival, standard section, half section, of which, most likely to swap portfolio standard section is also very important component, in the course of this may occur that kind of problem, such as cracks, transverse cracks appeared following the situation on the last section of the tower crane slewing how to deal with:

The main reason for this rift is the irrational structure, leading to material fatigue yield stress concentration, the formation of cracks. In general this phenomenon tower crane time is not long, no more than six years, some might appear a year, this situation is generally what structure? Are generally turning back seat and welded connections with right-angle side and a standard rectangular section steel using double-sided welding, and the other at right angles to the side and turn back seat welding, have undercut phenomenon. So the structure is very important! Decided to transfer the force structure, layout structure determines whether a reasonable and smooth power transmission and power transmission direction.

Undercut is because the standard in the production engineering section welding irregularities caused undercut reduces the effective cross-sectional area of ​​the standard section of the base material, reducing the capacity of the steel structure, also causing stress concentration, and develop into a crack source, in this Under kinds of action material fatigue easily cause crack or fracture.

All production units using the unit and installation should pay attention to these safety problems, the installation of safety as the first element, must pay serious attention, safety consciousness. The use of units have the choice of quality manufacturers and avoid irrational use of poor quality products, strict adherence to the process of doing wrong practices, timely inspection maintenance, preventive measure to reduce accidents!