Property and construction consultants Davis Langdon say that Brisbane and south-east Queensland is being partially insulated from a national building slow down by the large number of major infrastructure projects underway.

Davis Langdon has a national and international network and undertakes ongoing research into various aspects of the building and construction industry.

Brisbane based director Malcolm Butcher said Brisbane is in the enviable position where any development industry slowdown is largely being compensated by generational infrastructure projects such as dams, transportation links and health facilities.

"The $2 billion North South Bypass Tunnel which is currently underway is a perfect example of this," he said.

Mr Butcher said direct employment at any one time is approximately 900 and this will increase to 1500 jobs at peak construction time.

"This is a massive project and apart from the employment numbers some of the statistics on the actual construction side of it are significant."

He said the 6.8 kilometre tunnel, including 4.8 kilometres of dual twin lane tunnels, will use up 280,000 cubic metres of concrete.

"The hard rock tunnel boring machines advance between 16 and 20 metres per day and the excavated material, totaling approximately 3.5 million tones, will be transported via two conveyor belts, each 4.8 kilometres long, to two silos at Bowen Hills," he said.

"The material is set for use at Brisbane Airport."

Mr Butcher said there would be 37,000 precast concrete sections used during construction and they are delivered three at a time by large trucks.

"The economic boost this project alone is providing to south-east Queensland is massive and it is only one project of significance currently underway."

Mr Butcher said the ongoing mining boom, continuing strong migration levels and the sheer weight of infrastructure works underway would continue to underpin the State’s economy.

"We are probably better equipped than most areas in Australia to ride out any construction industry downturn and even that should only be minimal as financial markets re-adjust and we see interest rates start to reduce through next year," he said.

For further information, contact Meaghan Jones at Davis Langdon's Communications Department on +61 3 9933 8800 or email mjones2@davislangdon.com.au