The union that represents cleaning staff at more than 1,500 New York City office buildings is set to vote on whether to authorize a strike.
Local 32BJ of the Service Employees International Union will vote Thursday on whether to grant its bargaining committee the authority to call a strike. The current contract expires Dec. 31.
The union says it will not accept management's proposal for a two-tier wage structure that would pay new hires less than existing workers.
A management group says New York City's building workers are the highest-paid in the country.
The Realty Advisory Board on Labor Relations says the workers earn an average salary of $47,107. The realty board says the total cost per employee including benefits is $76,721.
The last office cleaners' strike was in 1996.