Lattice Wind Turbine Towers for Sale
AGICO offers customized steel manufacturing services for all steel structures in wind turbine lattice towers and hybrid towers. Each lattice tower is specially designed for a windmill project. Customers shall provide the drawings and specifications of the fabricated parts, and our factory will complete the manufacturing and delivery.
Besides the wind turbine tower fabrication, AGICO also supplies high-strength wind tower bolts and nuts for windmill projects.
Lattice Tower Wind Turbine Manufacture Details
- Truss Steel Materials: Angle steel/steel pipe/steel plate
- Structural Member Dimension: Customized according to drawing
- Wind Resistance: 0.35KN/m² -0.75 KN/m²
- Seismic Resistance: 8°
- Grounding Resistance: ≤10Ω
- Design Life: 30 years
- Connection Method: Bolted connection
- Corrosion Protection: Hot-dip galvanizing, powder coating/painting
- Installation: Manual ground installation, crane installation
Steel Lattice Tower Wind Turbine Introduction
The steel lattice tower for wind turbines is a common solution for onshore wind turbine towers. It has a truss-type support structure assembled from modular structural steel (angle bars and pipes) with high-class anti-corrosion coating treatment, The foundation of truss-type towers can adopt a point-distributed layout similar to ultra-high-voltage (UHV) transmission towers.
Why Use Truss-Type Lattice Towers?
- Lattice tower is a new-generation solution for ultra-high wind towers. With strong adaptability, truss-type towers can be flexibly deployed in both distributed and centralized wind projects, particularly in complex mountainous terrains, offering higher reliability and lower overall cost.
- Compared with mainstream tubular wind turbine tower foundations, lattice towers can significantly reduce land occupation and is suitable for applications such as river crossings, drainage canals, and rural roads. It expands the range of feasible wind turbine installation environments, allowing turbines to be positioned closer to power load centers and enabling local consumption of generated electricity.
Key technologies for lattice wind turbine tower include 4 parts: a built-in high-strength bolt connection system, a split-type tubular truss design, a maintenance access with self-elevating functionality, and a truss tower electrical equipment placement design.
Fabrication Options for Lattice and Hybrid Tower
AGICO provides full-range steel fabrication services for wind turbine lattice towers and hybrid towers, covering precision component manufacturing, modular assembly, and corrosion protection.
Lattice Tower Fabrication
- Angle steel and tubular member cutting & drilling
- High-precision bolt hole processing
- Trial assembly and dimensional inspection
- Hot-dip galvanizing and surface treatment
Hybrid Tower Steel Sections
- Lattice lower section fabrication
- Tubular steel tower section rolling and welding
- Flange and transition section manufacturing
- Interface accuracy and quality control
Lattice Tower Wind Turbine Application
- Ultra-high Hub Height Turbines: Supporting onshore wind turbines rated above 5 MW with hub heights of 140–160 meters.
- Complex Terrain Windmill Projects: Wind turbine locations in mountainous wind farms with slopes exceeding 25°.
- Retrofit and Upgrade Projects: Replacing conventional tapered tubular towers at the end of their service life, where the modular design significantly shortens installation and assembly time.
Wind Turbine Lattice Tower Manufacturing
1. Steel Material
The steel materials for lattice towers for windmills are structural steel angles and pipes; common steel grades include Q345B, IS 2062/EN 10025, etc. Key technological innovations include:
- Optimized column wall thickness: The tubular member wall thickness gradient is determined through finite element analysis (FEA), with the thickness reaching 35 mm at the base and gradually tapering to 18 mm at the top.
- Node reinforcement technology: L-shaped stiffeners are installed at flange connection areas, the gusset plate thickness is increased by 20%, and C40 micro-expansive concrete is simultaneously poured for integrated strengthening.
- Coating for Corrosion protection: The onshore solution for hot-dip galvanized coating thickness is ≥ 85 μm. For coastal environments, an additional epoxy zinc-rich primer + polyurethane topcoat system is applied to provide enhanced dual-layer protection.
2. Lattice Tower Structure Design for Wind Turbine
Lattice tower structure shall be designed and manufactured according to the wind turbine capacity, tower height, working environment, which is usually completed by a windmill engineering company, while the lattice tower structures have the following common designs:
- Web Member Connection: The web member of the lattice tower structure is formed by horizontal bracing and diagonal members, positioned at crossing angles of 45°–60°, and connected by riveted joints or annular plate node.
- Steel Lattice Tower Structure: The tower consists of a reinforced concrete column base and a steel truss superstructure. The truss tower body is assembled with prefabricated tubular members by flanges and tower bolt fasteners.
- Lattice Tower Layout: The lattice tower base adopts a polygonal layout, the side lengths is usually range from 1/20 to 1/10 of the total tower height. The steel columns are interconnected by beams, forming a closed space for wind turbine equipment..
- Multi-column Support: The main wind turbine tower structure is supported by 3 or more columns, which are segmented and connected via internal flanges, with each segment length controlled within 12 meters to accommodate standard transportation vehicles.
3. Installation & Transportation
Wind turbine lattice towers are manufactured in separate parts and transported to the site for pre-assembling on the ground, which makes it a significant advantage over tubular towers in transportation in mountain areas. Here are the details:
- Modular transportation: The lattice tower truss structure is disassembled into standardized modules. Sub-column segments are transported separately and connected with high-strength internal flanges and fasteners, transportation requires specialized vessels for sea transport or truck for road transport.
- Ground pre-assembly: Approximately 80% of the structural members are assembled on the ground within a 50-meter radius of the turbine location. Laser positioning is employed to ensure an installation accuracy of ≤ 3 mm/m.
- Overall lifting: Choose crawler crane of proper capacity for main tower structure erection, with the simultaneous installation of internal climbing systems and safety platforms for other truss members.
Wind Turbine Lattice Tower Cost Analysis
The total cost of Wind Turbine lattice tower covers more than just the manufacturing cost, transportation and installatino, foundation cost shall be accounted in the cost analysis:
- Material and manufacturing costs: Accounting for approximately 60%–70% of the total cost, mainly dependent on steel prices and tower weight. Based on current steel market prices, the estimated cost per ton ranges from $1,180 to $1,460.
- Installation and transportation costs: Accounting for approximately 20%–30% of the total cost, influenced by project location and lifting complexity.
- Foundation costs: Accounting for approximately 10%–20% of the total cost, which may be higher than that of conventional tubular towers due to the use of point-type foundation designs.
For a 3 MW (3,000 kW) wind turbine, the total cost of the steel lattice tower section adopting a truss-type design is estimated to be in the range of $806,000 to $1,000,000. The actual cost is based on market data estimates and shall be determined according to the detailed technical and tender results. If you want to know the cost for your wind turbine lattice tower project, contact AGICO now for more details.
