ENE/Wind/TBT-ENE-011

Nacelle and Blade Installation

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Nacelle and Blade Installation

Toolbox Talk Record

Ref: TBT-ENE-011  |  Issue: 1  |  Date: March 2026
PresenterProject
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What?

  • Nacelle and blade installation is the most hazardous phase of wind turbine construction.
  • Nacelles typically weigh between 50 and 300 tonnes and are lifted to heights exceeding 80 metres.
  • Individual turbine blades can exceed 60 metres in length and are extremely sensitive to wind.
  • Lifts of this scale require detailed lift plans prepared by an Appointed Person under LOLER 1998.
  • Wind speed limits for blade lifts are typically set at 7–10 m/s due to the sail effect.
  • Large mobile cranes or specialist tower cranes with capacities over 500 tonnes are used.
  • Exclusion zones must cover the full radius of the crane boom plus the blade overhang.
  • Working at height during bolt-up and connection takes place in exposed and elevated positions.
  • Lightning risk increases significantly at nacelle height — weather monitoring is essential.
  • Communication between the crane operator, riggers, and nacelle team must be continuous and clear.

Why?

Fatal consequencesDropping a nacelle or blade from 80+ metres would destroy the turbine and could kill anyone within the exclusion zone.
Extreme wind sensitivityTurbine blades act as sails — even moderate gusts can make a suspended blade uncontrollable.
Working at heightPersonnel connecting components at nacelle height face severe fall risks in exposed, windy conditions.
Do Don't
  • Prepare a detailed lift plan for each nacelle and blade lift operation
  • Monitor wind speed continuously and halt lifts if limits are exceeded
  • Establish and enforce exclusion zones for the full crane and load radius
  • Ensure all riggers and installers wear full fall arrest harnesses at height
  • Use continuous radio communication between the crane team and nacelle crew
  • Verify crane ground conditions and outrigger pad capacity before each lift
  • Brief the entire lifting team on the sequence, signals, and abort procedures
  • Check weather forecasts for wind, lightning, and precipitation before starting
  • Ensure a rescue plan is in place for personnel working at nacelle height
  • Record all lift data including wind speeds, loads, and any deviations
  • DON'T attempt blade lifts in wind speeds above the approved limit
  • DON'T allow personnel inside the exclusion zone during heavy lifts
  • DON'T proceed with lifts if lightning is forecast within the work period
  • DON'T work at nacelle height without a full harness and anchor point
  • DON'T continue a lift if the load starts to spin or become uncontrollable
  • DON'T skip the pre-lift briefing — every team member must understand the plan
  • DON'T position tagline operatives where they could be struck by swinging loads
  • DON'T assume yesterday's ground assessment is valid today after rainfall
  • DON'T use communication methods that could be affected by wind noise
  • DON'T rush bolt-up connections at height to save time during weather windows

See also: Wind Turbine Construction Safety | Lifting Operations Awareness (LOLER)
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