The gates of McGill & Co remained locked yesterday as recently laid-off employees tried to return their company vehicles.
Staff were told to return cars, vans and other materials yesterday, after they were made redundant on Friday afternoon.
However, workers who arrived on site with their vehicles found they could not hand them back as the gates to the compound in Dryburgh were closed.
One McGill worker, who declined to be named, said workers may have been given extra time to unload their vehicles.
He said: “Boys with vans have until the end of the week as they have to empty them (of tools).
“Company cars are due in today or tomorrow – the gates at the building are locked just now.”
A Partnership Action for Continuing Employment (Pace) event has been confirmed for Thursday at the Apex Hotel.
Alison Henderson, CEO of Dundee and Angus Chamber of Commerce, has encouraged affected workers to attend. She said: “There will be a whole roster of support agencies who will be able to help workers get through this.
“It’s intended to get as many of the affected workers in the same room as possible.
“We’ve had a number of employers calling us to say they have vacancies they can offer.”
The building contractors plunged into administration on Friday.
Shocked employees were given the news at meetings in the firm’s Dundee headquarters and at other offices in Glasgow and Edinburgh.
A total of 374 workers have been made redundant.
About 50 have been kept on for the duration of the administration process.
The firm has blamed “challenging” trading conditions and delays in payments for its collapse.
George Ramsay, Unite regional industrial officer, has pledged to support workers where possible.