PITTSBURGH — Pittsburgh Symphony Orchestra musicians went on strike Friday after unanimously rejecting calls for a 15 percent pay cut, pension changes and staffing cuts they say management has proposed.

“The consequences of those cuts would be severe and immediate,” the union said in a statement announcing the strike. It predicted musicians would leave, and the symphony would be unable to attract top-notch players.

The musicians have agreed to concessions in the past, most recently a nearly 10 percent pay cut in 2011, to help the orchestra deal with funding issues. The proposed immediate 15 percent pay cut would reduce each musician’s base pay from $107,239 to $91,153, the union said, with annual raises of 2 percent and 3 percent in each of the next two years.

Symphony management didn’t immediately respond to request for comment on the strike.

However, symphony President Malia Tourangeau last month said the orchestra is at a “critical crossroad,” losing $1.2 million for its Broadway series because its contract with the Pittsburgh Cultural Trust is expiring along with a donor’s contributions. The orchestra is projecting a deficit of nearly $1.6 million this season.

The financial forecast emerged when the symphony applied for $1.55 million in grants from the Allegheny Regional Asset District. The quasi-governmental agency was set up to distribute a share of Allegheny County’s 1 percent sales tax to “regional assets” like sports stadiums, libraries, and arts groups – including the symphony.

About $150,000 of the grants would be earmarked for fiber optic cables for high-definition video and interactive flat-screen signs; the other $1.4 million was to cover expenses. The projected $1.56 million deficit for 2016-17 was based on the symphony receiving the full regional asset grant amount.