Company News

Qingdao Altai Tower Co., Ltd. has successfully completed the factory trial assembly of a 30-meter, 4-legged radar support tower. Executed for a major North African telecommunications infrastructure project, this pre-shipment fit check verified the structural integrity, bolt alignment, and critical dimensional tolerances of a 54.5-ton prototype tower before hot-dip galvanizing and final dispatch.

H2-1: What the Trial Assembly Covers: 2mm Leveling and Zero Site Modification

• For this specific radar support tower project, the trial assembly was not merely a visual check. It was a stringent dimensional verification aligned with the client's approved Inspection and Test Plan (ITP).

The assembly verified the following critical metrics:

1. · Overall Leveling Tolerance: The fully assembled 30m prototype tower was verified strictly within a maximum leveling tolerance of 2mm, ensuring structural plumbness.

2. · Bolt Alignment and Fit-up: All tower members, connection nodes, and accessory bolts were fitted without interference or distortion.

3. · Zero Site Modification Rule: The contract strictly prohibits any cutting, drilling, reaming, or grinding to correct fabrication errors during assembly. This trial successfully validated that all parts fit perfectly without the need for field modification.

H2-2: 30m 4-Legged Radar Tower: Key Design Parameters

The radar support towers under production are designed for severe environmental conditions and heavy payloads. Key parameters verified during the trial assembly include:

1. · Tower Type: 30m 4-legged self-supporting lattice structure.

2. · Unit Weight: A minimum of 54,500 kg per tower, reflecting the heavy-duty steel required for radar stability.

3. · Galvanization & Anti-Corrosion: Components are thoroughly prepared before assembly. Post-assembly, the steel will undergo hot-dip galvanizing with a minimum coating thickness of 85 μm at any measurement point.

4. · Accessories Integration: The assembly included the fit-check of anti-falling devices, copper earthing tapes, lightning rods, and aviation tower lights.

H2-3: Why Factory Trial Assembly Matters for Radar Installations

• Radar towers are often installed in remote or critical infrastructure sites where on-site adjustments are costly and compromise structural integrity. Conducting a full trial assembly at our manufacturing facility in Qingdao mitigates these risks:

1. · Risk Transfer: Identifies fabrication or hole-alignment issues at the factory stage, rather than on the construction site in Libya.

2. · Zinc Coating Protection: By validating the fit-up before galvanizing, we ensure that no post-galvanizing cutting or drilling (which exposes raw steel and causes rust) is required on-site.

3. · Third-Party Verification: The entire trial assembly was witnessed and approved by an independent third-party inspection company, ensuring objective compliance with international standards.

Q & A

Q: What is the acceptable leveling tolerance for a 30m radar support tower trial assembly?

1. -A: In this project, the fully assembled prototype tower must be leveled with a maximum allowable tolerance of 2mm to ensure structural integrity and proper radar alignment.
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Q: How do you prevent site modification during radar tower installation?

1. -A: We perform a complete trial assembly at our factory before shipment. Any cutting, drilling, or grinding to correct fabrication errors is strictly prohibited unless prior written approval is obtained. This ensures all components fit perfectly on-site.

H2-4: Verification Standards and Documentation

The trial assembly is executed strictly under the oversight of an independent inspection agency. The documentation generated from this process includes:

1. Material Traceability (Mill Certificates for all steel members).

2. Complete Trial Assembly Reports and dimensional inspection records.

3. NDT (Non-Destructive Testing) reports for welding integrity.

4. Compliance verification against the approved ITP.

All records are reviewed and stamped by the client's representative before the prototype tower is disassembled, surface-treated, and cleared for shipment.