What Structural Hazards Arise From Improper Installation Of Tower Crane Tie-rods?

I. Improper tie-rod angles causing localized stress concentration on the tower mast
If the inclination angle of the tie-rod exceeds standard limits, the tensile force generates a significant lateral component. The welds on the tower mast sections are subjected to prolonged alternating shear forces, making them highly susceptible to cracking and causing deformation of the main structural members.
Uneven loading between two tie-rods-specifically, overloading on one side-can directly cause the tower mast to twist toward that side.
II. Failure to install backing plates, leading to the crushing of concrete walls and embedded parts
When tie-rod supports press directly against wall reinforcement without steel backing plates to distribute the pressure, prolonged, repeated pulling forces can cause embedded parts to loosen or pull out. This results in extensive damage to the exterior wall concrete and a loss of load-bearing capacity at the attachment point.
In high-wind conditions, the tower mast loses lateral restraint, leading to a drastic increase in the amplitude of swaying.
III. Forcibly tensioning tie-rods, causing artificial bending of the tower mast
Workers may excessively tension the tie-rods to correct minor leaning in the tower mast. This external force induces permanent bending; as the crane climbs higher, the deformation worsens, creating a risk of collapse.
IV. Unequal tie-rod lengths causing load imbalance between the two members
If the two tie-rods at the same attachment level are of unequal length, the entire load concentrates on a single member. Overloading a single rod can lead to bending or stripped threads; if the rod snaps, the attachment's protective function fails completely.
V. Excessive spacing between attachments, resulting in an overly long free-standing tower section
Arbitrarily increasing the distance between attachment levels causes the unsupported height of the tower mast to exceed design limits. High-altitude wind loads are amplified manifold; insufficient overall tower rigidity and excessive oscillation amplitudes exacerbate structural fatigue.
Summary
The anchoring system serves as a critical line of defense for tower crane stability. Improper construction practices-such as incorrect angles, supports not making full contact, forced tensioning, and uneven load distribution-gradually compromise the tower structure. Only by strictly adhering to the drawings to control tie-rod angles, ensuring balanced loading on the dual rods, and properly reinforcing the supports can the tower's stability be firmly secured and structural accidents at height be prevented.