Dozens of workers on the Queensferry Crossing walked out in a row over Christmas payments.
Staff employed by the construction consortium building the £1.3 billion bridge were said to have confronted managers this afternoon over shortfalls in their wage packets.
A Transport Scotland spokesman said: “We understand that approximately 50 of FCBC’s employees have reported an issue with the calculation of holiday pay under new legislation [affecting holiday pay calculations].
“There are currently over 1,200 people employed on the project and other than the small number of affected employees, work has continued right across the site as normal this afternoon.
“Transport Scotland has a project team based on site who are monitoring the dialogue to help resolve the issue.”
The workers are understood to have gone to the site offices of the Forth Crossing Bridge Constructors group, which is building the bridge for the Scottish Government’s Transport Scotland agency.
It is understood the action has had no impact on the progress of the project, which is due to be completed by the end of next year.