Cathead Tower — 110-500 kV Transmission Tower
IEC 60826 Compliant · Hot-Dip Galvanized · 50,000+ Tonnes Annual Capacity. Cathead towers deliver cost-effective performance for medium to high-voltage transmission lines across diverse terrains.
Technical Specifications
Available in multiple configurations to match your project voltage and load requirements.
| Parameter | Unit | Spec 1 | Spec 2 | Spec 3 |
|---|---|---|---|---|
| Voltage Level | kV | 110 | 220 | 500 |
| Tower Height Range | m | 25-40 | 35-60 | 50-90 |
| Weight Range | ton | 8-15 | 15-30 | 30-60 |
| Material | — | Q345B | Q345B | Q420 |
| Wind Load Rating | m/s | 30 | 35 | 40 |
| Corrosion Protection | — | Hot-Dip Galvanized | Hot-Dip Galvanized | Hot-Dip Galvanized |
| Design Standard | — | IEC 60826 | IEC 60826 | IEC 60826 |
| Service Life | years | 30 | 30 | 30 |
Product Features
Engineered for durability, compliance, and project efficiency.
Optimized Structural Design
Cathead configuration minimizes steel weight while maintaining full structural integrity. Proven topology reduces foundation costs in soft-soil conditions.
Precision Manufacturing
CNC angle processing and robotic welding ensure consistent quality across every joint. All holes punched to ±0.5mm tolerance for field assembly compatibility.
Full Quality Assurance
100% ultrasonic weld inspection and third-party material testing. Mill certificates provided for all structural steel.
Application Versatility
Suitable for overhead transmission, renewable energy evacuation, and rural electrification projects in tropical, desert, and moderate wind zones.
Manufacturing & Engineering Integrity
Precision-controlled fabrication processes with certified quality metrics for every production batch.
Steel Grade Metallurgy
Q345B: yield ≥345 MPa, tensile 470–630 MPa, impact toughness ≥34 J at −20°C (longitudinal, Charpy V-notch per GB/T 1591). Q420: yield ≥420 MPa, tensile 520–680 MPa. Low-temperature impact verification mandatory for cold-region projects below −10°C ambient. Mill certificates with full chemical composition and mechanical property traceability provided per heat number.
Welding Integrity
Full-penetration structural welding per AWS D1.1 / EN 1090-2 execution class EXC3. 100% Non-Destructive Testing (NDT) via ultrasonic protocols (UT per ASTM E164). Acceptance criteria: no linear indications exceeding 3 mm, no rounded indications exceeding 6 mm. Welder qualification records (WQR) and welding procedure specifications (WPS) maintained for all joint configurations.
Anti-Corrosion Specification
In-house Hot-Dip Galvanizing (HDG) per ASTM A123 / EN ISO 1461. Average coating thickness ≥86 μm (zinc mass ≥610 g/m²). Coating uniformity verified by magnetic thickness gauge per ASTM E376. Adhesion test per ASTM D4541 with minimum pull-off strength 3.0 MPa. Supplementary epoxy zinc-rich primer available for high-corrosion coastal zones (C4–C5 corrosivity class per ISO 9223).
Global Grid Environmental Adaptability
Transmission towers engineered for Ultimate Limit State (ULS) performance under the world’s most demanding climatic and geographical conditions.
45 m/s Ultimate Wind Load
Structures verified per IEC 60826 reliability-based design framework for 3-second gust wind speed of 45 m/s (terrain category II, return period 50 years). Ultimate limit state (ULS) load factor γ=1.5 applied to characteristic wind pressure. Serviceability deflection limit H/200 at working load. Foundation reactions computed for combined wind + ice loading scenarios.
High-Salt Coastal Corrosion
HDG coating supplemented with epoxy zinc-rich primer (minimum 80 μm DFT) on lower splash-zone segments for C5 corrosivity environments per ISO 9223. 500-hour accelerated salt spray test per ASTM B117 on production sample coupons. Annual inspection protocol with coating thickness survey at years 1, 3, 5, and 10 of service life.
Seismic Redundancy (ULS)
Elastic response spectrum analysis per applicable seismic zone with peak ground acceleration (PGA) up to 0.4g. Redundant load-path design ensures progressive collapse prevention at ultimate limit state. Ductile detailing per capacity design principles: plastic hinge formation in bracing members before main legs. Inter-story drift limited to 1.5% under design earthquake.
Project Gallery
Real-world installations and manufacturing facility photos.
Request a Quote for This Product
Our engineering team will review your requirements and respond within 24 hours with a detailed quotation and technical recommendations.
Need a Different Configuration?
Custom designs available for special voltage levels, wind zones, and project specifications.