Straight-Line Tower
Mainly used in areas where the transmission line runs straight.
- 35kV
- 12-36 m
- 110kV
- 15-51 m
- 220kV
- 18-54 m
- 500kV
- 24-60 m
- 750kV
- 24-102 m
Products & Services
Explore transmission towers, substation gantries, communication towers, steel monopoles and fasteners, plus drawing-based fabrication with hot-dip galvanizing and export delivery.
Category 01
Power Transmission Towers
Voltage range: 35 kV to 750 kV. Hengshengda manufactures angle steel and tubular transmission towers for overhead power lines worldwide. Our towers are designed to comply with IEEE, CSA, BS, AS/NZS, and ASCE standards and fabricated from high-strength structural steel with hot-dip galvanized coating per ISO 1461.
Tower Height Reference
Transmission Tower Height Range by Voltage Grade
Angle Tower
Mainly used at line turning points and terminal sections.
- 35kV
- 9-24 m
- 110kV
- 15-27 m
- 220kV
- 18-30 m
- 500kV
- 21-33 m
- 750kV
- 24-36 m
Crossing Tower
Mainly used where lines cross roads, railways, rivers, valleys, power lines, and communication lines.
- 35kV
- 27-48 m
- 110kV
- 27-48 m
- 220kV
- 30-54 m
- 500kV
- 36-60 m
- 750kV
- 36-102 m
- Custom design per project specification
- Full-scale tower testing available
- CAD / PLS-Tower / SAW detailed drawings
- Strict QC: material traceability & weld inspection
Category 02
Substation Gantries & Structures
Custom-engineered substation gantries, portal frames, equipment support beams, cable trays, and bus supports for GIS and AIS projects up to 750 kV. Designed to client-specific layout and loading requirements with full structural analysis.
| Parameter | Specification |
|---|---|
| Voltage Class | Up to 750 kV |
| Structure Types | Gantry, portal frame, H-frame, equipment pedestal |
| Span Length | As per project — typical 8–30 m |
| Material | Q355B / Q420B structural steel |
| Finish | Hot-dip galvanized or duplex coating (Zn + paint) |
| Design Standards | IEC, IEEE, BS EN 1993, or client-specific |
| Delivery | Knock-down bolted or pre-welded modules |
- FEA structural analysis for wind & seismic loads
- Integrated anchor bolt & foundation plan
- Color coating options for visual alignment
- Marked & bundled for easy field erection
Category 03
Communication Towers
Lattice steel towers and monopoles for cellular networks (4G/5G), microwave relay, radio broadcasting, and wireless infrastructure. Designed to support multiple antenna arrays, microwave dishes, and equipment platforms with full wind and ice load analysis.
| Parameter | Specification |
|---|---|
| Tower Types | Self-supporting lattice, guyed mast, monopole |
| Height Range | 15 m – 100 m (custom heights available) |
| Configuration | 3-leg / 4-leg triangular or square lattice |
| Antenna Capacity | Multi-operator (3–6 sectors), co-location ready |
| Material | Q355B / Q420B angle steel or tubular sections |
| Corrosion Protection | Hot-dip galvanized per ISO 1461 or ASTM A123 |
| Design Standards | TIA-222, ANSI/TIA-322, IEC 60652, or local codes |
| Wind Load | Per site-specific wind zone (up to 200 km/h) |
- Full structural analysis & foundation design
- Integrated ladder, platform, cable tray, and lighting
- Modular bolt-together sections for easy transport
- Compliant with telecom operator specifications
Category 04
Steel Monopoles
Multi-sided tapered steel monopoles for power distribution (12 kV – 230 kV), telecommunication towers, street lighting, and traffic signal poles. Manufactured from high-strength steel plate with continuous longitudinal welding.
| Parameter | Specification |
|---|---|
| Voltage Class | 12 kV – 230 kV |
| Cross-Section | 12-sided / 16-sided / 20-sided / round tapered |
| Height Range | 9 m – 50 m (single piece or modular) |
| Base Diameter | Up to 1,500 mm |
| Wall Thickness | 4 mm – 25 mm |
| Material | Q355B / Q420B / Q460C / ASTM A572 |
| Corrosion Protection | Hot-dip galvanized or thermal spray + paint |
- Suitable for power, telecom, and lighting
- Arm brackets & base plates included
- Low maintenance & long service life
- Transport-friendly section design
Category 05
Bolts & Fasteners
Complete range of transmission tower hardware and fasteners including step bolts, anchor bolts, base plates, connection plates, vibration dampers, clamps, spacers, and all sizes of hot-dip galvanized high-strength bolts (4.8–10.9 grade).
| Product | Specification |
|---|---|
| Step Bolts | M16 / M20 / M22, galvanized, anti-theft option |
| Anchor Bolts | M24 – M90, ASTM F1554 / BS 7419 / DIN |
| High-Strength Bolts | Grade 8.8 / 10.9, ISO 898, with nut & washer |
| Base Plates | Custom size, plasma-cut, drilled per drawing |
| Connection Plates | Gusset, splice, bracing plates |
| Clamps & Hardware | Suspension, strain, jumper, spacer, vibration damper |
| Coating | Hot-dip galvanized (ISO 1461), HDG + PTFE available |
- Fully traceable material certificates
- Third-party testing & inspection welcome
- Bundled & labeled per BOM
- OEM / custom fabrication accepted
Category 06
Steel Fabrication & Hot-Dip Galvanizing
Explore Fabrication & Galvanizing
Need steel components fabricated and galvanized to your drawings? Review the manufacturing, coating, inspection and export packing scope for your project.
| Process | Review scope |
|---|---|
| Fabrication | Coordinate cutting, drilling, welding and assembly requirements. |
| Hot-Dip Galvanizing | Review component suitability and the specified coating requirements. |
| Inspection | Check the agreed dimensions, finish and inspection documentation. |
| Export Packing | Agree component identification, packing lists and the loading plan. |
- Equipment & Pipe Supports
- Substation Steelwork
- Platforms, Stairs & Railings
- Custom Frames & Connections