Several hundred construction workers in the Unite and GMB unions on Total’s Shetland Gas Plant have voted to strike.
GMB members voted by 98 percent for strikes and Unite members by 97 percent.
They work for Total’s main contractor Petrofac and its subcontractors Bilfinger Industrial Services (BIS), Balfour Beatty Engineering Services (BBES) and Randridge.
Workers want an extra £50 a day to compensate for Petrofac’s failure to provide suitable accommodation.
They also want payment for those staying on accommodation barges who face lengthy journeys to and from the construction site.
GMB Scotland secretary Harry Donaldson said Petrofac had “tried to bully and ride roughshod over standard industrial relations practices”.
Unite rep John Taylor said the problems with accommodation were “a safety issue”.
“It’s virtually impossible for some people to get sleep,” he said.
Talks between the unions and bosses were due to take place on Wednesday of this week.