Product Overview
This is a four-legged self-supporting lattice tower in which main members are Q345B and bracing is Q235B, lofted either from your drawings or from our standard tower family. Members are CNC cut and punched on multi-station presses with a hole pitch tolerance of +/-1 mm, so the crew on site bolts the tower together without reaming holes. The complete tower is acid pickled and hot dip galvanized to 86-120 microns, giving three decades of corrosion protection. Every member is steel stamped with its section number and shipped with matching galvanized bolts, step bolts and clamps.
Specifications
| Parameter | Value |
|---|---|
| Voltage class | 66 kV – 220 kV |
| Tower type | Suspension / tension / angle tower |
| Tower height | 25 m – 60 m |
| Base width | 3 m – 8 m |
| Main member grade | Q345B / A572 Gr.50 |
| Bracing grade | Q235B / SS400 |
| Zinc coating | min 86 microns (ASTM A123) |
| Connection bolts | M16 – M24 hot dip galvanized grade 6.8 |
| Design wind speed | 27 – 35 m/s |
| Design code | GB 50665 / ASCE 10-97 / IEC 60826 |
Applications
Used for new build and reinforcement of 66 kV to 220 kV overhead lines, including rural grid extension in Nigeria, mine site power lines in DR Congo, island interconnection in the Philippines and urban network upgrades in Bangladesh. Substation gantries and railway traction substations use the same fabrication.
Packing / Delivery / Payment
Packed tower by tower: main members strapped in bundles, small parts in wooden cases with a detailed packing list, shipped knocked down in 40HQ or open top containers with erection drawings and a member number schedule. Lead time is 30-45 days including galvanizing. Payment by L/C at sight or T/T with 30% deposit. We supply EN 10204 3.1 mill certificates, zinc coating thickness reports, SGS pre-shipment inspection, packing list and Certificate of Origin.