• A temporary lifting device used for raising tower members, cross-arms, and even full tower sections.
• Made from high-strength aluminum alloy, lighter than steel, making it easier to transport and erect.
• Configurable in different lengths (modular sections bolted together).

• Expressed in kN or tons.
• Must exceed the maximum load you plan to lift, with at least 25–30% safety margin.
• Typical:
  • 1–3 tons → for light angle members.
  • 5–10 tons → for tower panels and sections.
  • 15–20+ tons → for heavy transmission towers (400–765 kV).

• Gin pole length should be higher than the tower section being erected.
• Common lengths: 6 m, 9 m, 12 m, up to 24 m.
• Longer poles = higher lifting height, but lower load capacity (due to bending).

• Installed with an inclination (5–15°) for stability.
• Capacity reduces as the angle increases — always check the manufacturer’s load chart.

• Telescopic or modular sections → easier to transport and adjust height.
• Aluminum alloy grade (e.g., 6061-T6) → ensures strength and corrosion resistance.

• Sheaves/pulleys sized for the rope/steel wire used.
• Guy lines (usually 3 or 4) to stabilize the pole.
• Base plate or ground anchoring system for stability.

1. Tower Type
   • Small distribution towers (≤33 kV): light 1–3 t poles, 6–9 m.
   • Sub-transmission towers (66–132 kV): 5–10 t, 9–15 m.
   • Transmission towers (220–400 kV): 10–15 t, 12–18 m.
   • UHV towers (500–765+ kV): 15–20+ t, 18–24 m.
2. Member Weight
   • Find the heaviest section/panel to be lifted.
   • Select a pole with capacity ≥1.25 * heaviest load.
3. Erection Method
   • Piece-by-piece erection → shorter poles acceptable.
   • Block/panel lifting → requires higher capacity and longer pole.
4. Site Conditions
   • Narrow sites → modular aluminum poles easier to handle.
   • Coastal/corrosive areas → aluminum is preferred over steel.

• Always use certified poles with load test reports.
• Follow manufacturer’s load-angle chart — capacity decreases with tilt.
• Use swivel blocks, anti-twist rope, and proper anchoring.
• Inspect pole joints, pins, and guy ropes before every lift.

Rule of Thumb:

• Capacity: Heaviest load * 1.25 safety factor.
• Length: Tower section height + clearance.
• Material: High-strength aluminum (lightweight, corrosion resistant).
• Accessories: Guy lines, base, pulley matched to load.