HTC has more than 180 tower crane operators and they voted 94% last week in favour of strike action in a dispute over pay.
Three 24-hour stoppages have been called for successive Fridays – on the 7th, 14th and 21st November.
Their union, Ucatt, warned that a large number of sites across London and the rest of England are set to be affected including: Crossrail, the London Bridge redevelopment, Nova Square Victoria, the Elephant and Castle redevelopment and the Atomic Weapons Establishment at Aldermarston.
Major construction contractors set to be affected include: Kier, Lend Lease, Bam, Costain, Mace and Vinci.
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