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Sustainable timber: can my walls talk?

UQ people
Published 31 Jul, 2020  ·  3-minute read

Dr Joe Gattas is at the forefront of a project that aims to reduce wastage and emissions to work towards a sustainable timber industry, while adding value, knowledge and character at the same time. Learn about his quest for mass timber sustainability. 

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Sustainable timber means embracing "imperfections"

If you’ve visited Bunnings or a timber yard, or driven past a lumber truck, you’ve seen the rows upon rows of stacked timber, all cut to uniform lengths and widths.

Have you ever wondered why we’re so fixated on this uniformity, rather than embracing the natural defects in timber that can actually add character and strength to a structure?

Did you know the timber industry wastes huge amounts of time, money and resources removing pieces considered to be ‘defective’?

If you answered ‘yes’ to any of those questions, you're in good company.

Dr Joe Gattas of UQ’s School of Civil Engineering believes we should flip the current equation and design buildings or usages specific to the qualities of the available timber, rather than using only those pieces that fit our rigid traditional requirements.

“In sustainable construction, one of the biggest unknowns lies in how we can reduce resource consumption, and subsequently and importantly, reduce total carbon emissions,” says Joe.

“There’s significant scope to reduce waste. We’re talking about going from using 40% of the tree to being able to use 80%. How do we use all those defects and funny looking bits and include them as part of a structure that creates added meaning and value?"

“Wouldn’t it be nice to be able to show people around your building and, not only has that building been given a unique personality, but there’s also a story to tell about where the material is from and the history behind it?”

UQ Senior Lecturer Joe Gattas stands in a classroom beside a window look out over greenery

Working towards mass timber sustainability

In addition to being a senior lecturer at UQ, Joe is a Chief Investigator at the Future Timber Hub, a collaboration funded by the Australian Research Council.

Focusing on sustainable timber, the hub is a partnership between:

  • UQ
  • the Queensland Department of Agriculture and Fisheries
  • Arup
  • Hyne Timber
  • Lendlease
  • the Queensland Fire and Emergency Services
  • Scion NZ
  • other universities from Australia, Canada and New Zealand.

“If we better understand the ways trees grow, and how they are processed as building materials, we can design their end-use to match specific natural attributes and reduce the environmental impact of our building construction,” says Joe.

Rather than literally trying to jam a round peg into a square hole by cutting what nature provides into existing ‘standard’ sizes, the project seeks to observe, track and record the qualities of the stock available before the timber is even harvested.

Joe describes this as a “digital passport” for timber materials, adding it to a database that drastically increases the industry’s knowledge about available construction assets, and allows for more educated apportioning and final usages.

Ultimately, this data-driven approach means that from the outset, researchers and construction companies can access data from forests at the planning stages of a project, which means they can accurately predict building materials required through digital fabrication and mass customisation.

“That way, we don’t have to pick timber out of a lumber yard or hardware store,” says Joe.

“We can pick timber straight from the forest, and can choose the exact piece of timber that best suits what we are trying to do."

“We are ensuring that the properties of any available piece are used where they can be most effective.”

Learn more about the many directions you can take by studying a Bachelor of Engineering (Honours) at UQ.

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