Workers protest building industry practices

About 2,000 building workers have rallied in Brisbane's CBD demanding changes to the way the industry is run.

They also want better safety.

Workers carrying a coffin lead the march to the Prime Minister's Brisbane office.

There was another death at a Brisbane construction site yesterday when a concrete beam fell on scaffolding in Brisbane's south.

It is the 18th death in Queensland this year.

Construction, Forestry, Mining and Energy Union (CFMEU) state secretary Michael Ravbar says workers are frustrated.

"Safety's become a major problem in our industry and a couple of weeks ago we lost two in a row in one week and they've just had enough," he said.

"The union says the Australian Building and Construction Commission is treating workers unfairly and needs to be abolished.

Similar rallies are being held in Sydney and Melbourne.