Dubbo Regional Airport Expansion

Client: Dubbo City Council

Project: Dubbo City Regional Airport Expansion

Description: Expansion of the existing departure lounge, including new café and toilets, passenger screening area and capacity for future second-storey and lateral expansion

Barnson’s Role: Structural, civil and geotechnical consultants, geotechnical testing and construction supervision.

Cost: Estimated construction cost $1.5 million

Time frame: Construction took 26 weeks, with the new terminal area operational early in 2014.

With more than 150 flights per week, Dubbo City Regional Airport is one of the state’s busiest regional airports, servicing more than 171,000 passengers per year. Following from a recent growth in Dubbo air traffic - which is expected to continue - Dubbo City Council called tenders to expand the airport.

Barnson was the successful tenderer for the structural and geotechnical engineering design for the expansion project. The project included doubling the capacity of the existing departure lounge, providing a new café, toilets and passenger screening area. The brief also included providing better circulation space within the baggage handling area and ensuring that the structure has the capacity for future growth. That meant an expansion that could have a second storey added and accommodate lateral expansion in the future.

The Barnson team provided structural engineering advice on the relatively column-free space within the new departure lounge and the removal of column within the baggage handling area. Led by Chris Bassingthwaighte, the team recommended the structural column grid be larger than the original design to minimise the number of ground-floor columns needed to support a future first floor expansion. As a result, the footings, steel structure and lateral bracing were designed with residual capacity to support loads associated with both vertical and lateral expansion.

Chris’s team designed the structural steelwork to allow the current roof to be dismantled and reassembled to cover a new first floor, while the external walls would remain free standing during construction. Additional footings have been incorporated to allow the installation of columns to support the first floor when it is added.

As well as the design work, Barnson provided geotechnical testing for the project and supervised construction.