9-11 May 2023
ICC Sydney


Last year’s amendment to the National Construction Code brought the use of timber to new heights, literally speaking. The amendment enables timber-built buildings to reach up to 25 meters in height to be lodged with planning under deemed-to-satisfy provisions. The update gave the timber construction industry, green building enthusiasts, architects and designers the chance to start using timber for their projects with less difficulty.

Cross-laminated timber (CLT) are wood boards consisting of three, five, or seven layers of dimension lumber positioned at right angles to one another and then glued to form structural panels with excellent strength, dimensional stability, and rigidity. Cross-Laminated Timber is an engineered material that controls cross-grain movement using its cross-lamination. The material shrinks less than standard solid timber construction. CLT’s light weight lessens load on foundation which in effect minimises the use of materials with high embodied energy.

Since its development in Austria and Germany in the early 1990s, the use of CLT has crossed the globe with its strong structural properties and low environmental impact. With the growing demand for low impact building materials, CLT is proving to be not only a sustainable choice but also a cost-competitive alternative to masonry, concrete and steel.

Typical properties of CLT include a thermal conductivity of 0.13 W/mK. Its density is typically between 480 – 500 kh/m3. When perpendicular to grain of boards, the compressive strength is up to 2.7 N/mm2 while it lodges 24-30 N/mm2 when parallel to grain of boards.

Timber is famously a renewable material, same with CLT. CLT stores carbon throughout its lifespan. Its long lifespan also ensures less waste. The material is typically kiln dried with low moisture content to impede fungal and pest attack.

CLT essentially avoids thermal bridging when employed for parapet wall or flat roof solutions. Its levelled composition prevents loopholes for heat to escape, thus, maintaining the proper insulation of building components. This also attributes to its greater load distribution that can reduce the thickness of slabs for better transportability while retaining product build quality. 米乐体育M6app下载ers and contractors can maximise productivity when working with CLT for a simple and fast onsite construction process.

With CLT, developments with robust and upfront blueprints can improve overall design and efficiency. The finished wall construction exhibits a high degree of vapour permeability to mitigate the effects of moisture under relevant weather conditions. Suitable for non-visible finishes, CLT is also compatible with exposed finishes.

As technology opens doors to more advanced building methods, there can only be more possibilities for CLT to make it an even more worthwhile material for use in timber building construction.

Join the session entitled “Sustainable 米乐体育M6app下载ing Technologies – Featuring CLT Construction” at the 米6米乐体育 on Wednesday 3rd May. Tickets are $25.00 + GST and are available through registration here .

About the Author: Spec-Net

This article was first published by 米6米乐体育 Media partner,  Spec-Net . The Spec-Net 米乐体育M6app下载ing Directory commenced in 1994 and since then their news portal has grown to attract over 10 million visitors per annum. Thieir audience demographics are architects, designers, engineers, contractors, building companies, building manufacturers both commercial and domestic.

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