Client: Sam’s Liquid Waste

Project: Liquid Waste Treatment Facility, Dubbo NSW

Barnson’s Role: Geotechnical investigations; building design and drafting; detailed structural and civil engineering design; and site supervision

Time frame: The project was completed early in 2014

Sam’s Liquid Waste in Dubbo specialise in hiring toilet and shower facilities for major events, as well as providing a range of waste disposal, grease trap, and septic tank servicing needs. As they are licensed by the EPA and service NSW and Queensland, it’s important that they comply with the BCA and EPA guidelines for the storage and processing of liquid waste.

To upgrade the facility a concrete tilt panel framed extension to an existing shed, that complied with regulatory guidelines, to provide liquid waste storage and treatment facilities was designed.

Barnson did the preliminary designs and saw them from development application through to construction. The building consists of an existing steel, portal frame shed.  New steel structures were added for liquid waste storage and treatment.

The new extension includes a reinforced concrete tilt panel framed extension to the side of the existing building, loading and offloading pits up to 3m deep extending out from the existing shed, an offloading awning, and a treatment shed with bunding.

The 10m high reinforced concrete tilt up panel walls are supported by steel rafters, and the main 23m clear span skillion are key features of the design. The design also features long, deep drop-off pits, and a partially open and closed wall cladding arrangement.

In addition to this, the slab for the extension had to be designed to support several tanks with a capacity of up to 60 kilolitres of liquid waste.

As well as completing the design to meet the regulations, Barnson undertook geotechnical site investigations. Barnson also detailed the structural and civil engineering design of the steel and concrete structures, bunding, stormwater and fire services, and supervision work until the project was completed.