CertiStruct22 – Merbau Structural Timber Perth
Premium Quality Structural Timber
With local green-sawn Jarrah and Karri no longer readily available in the market, CertiStruct22 is the proven structural hardwood alternative for demanding structural applications across Western Australia.
CertiStruct22 is an ideal timber for constructing and repairing jetties, wharfs and boardwalks. The solid Merbau construction beams are also commonly used for bridge decks and walkways.
CertiStruct22 is as versatile as it is durable.
What Is CertiStruct22?
CertiStruct22 is a solid, partially air-seasoned Merbau (Intsia Bijuga, commonly known as Merbau or Kwila) structural timber graded to Structural Grade No.1, F22. Its Strength classification is S2 and rates J2 for Joint Strength, making it one of the more highly-rated structural hardwoods available in Australia.
Sourced sustainably and certified 100% FSC® Chain of Custody, CertiStruct22 is the responsible choice for builders, engineers and project managers who require a high-performing, ethically sourced structural timber.
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Key features
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F22 structural grade
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Exceptional strength with Janka hardness of 7.6 kN
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Class 1 natural durability above ground
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Termite and bushfire resistant
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Low shrinkage and movement during drying
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Sustainably sourced - 100% FSC® Chain of Custody Certified
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Pre-oiled with Intergrain Universal Oil - ready to use on site
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Available in a range of post, beam and decking sizes
Delivery capability
We can save you time and money by delivering directly to your worksite.
Supply availability
With our fully equipped warehouse, we always have the stock available so you can get on with your job.
Why Specify CertiStruct22?
Its Class 1 natural durability above ground makes CertiStruct22 a preferred choice for jetty and wharf construction and repair in Western Australia. Its high density and strength group ensure structural longevity in demanding marine environments.
Boardwalk & Walkway Timber
For public and commercial boardwalk applications, CertiStruct22 offers the structural capacity, durability and low-movement properties needed for safe, long-lasting installations. Its pre-oiled finish and dressed appearance make it suitable for boardwalk applications.
Bridge Decks
CertiStruct22’s F22 structural grade, high Janka hardness and natural durability make it well-suited for bridge deck applications where performance and longevity under load are critical.
Mine Site Applications
CertiStruct22’s hardness, density and termite resistance make it a practical structural choice for mine site infrastructure, walkways and platforms across Western Australia.
Merbau Posts & Beams
Available in a range of post and beam sizes, CertiStruct22 is a structural-grade solution for pergolas, carports, verandas, decking subframes and heavy construction where certified hardwood performance is required.
CertiStruct22 Sizes Available (mm)
| Posts | 90×90 | 150×150 | 200×200 | ||||
| Beams/Bearers | 100×75 | 150×75 | 200×75 | 300×75 | 150×100 | 200×100 | 300×150 |
CertiStruct22 Structural Properties
Why Choose Austim for CertiStruct22?
At Austim, we’ve been Perth’s leading supplier of quality timber to builders, trades and architects across Western Australia since 1985. We don’t just sell timber, we help you choose the right product for your application.
- Expert advice: Ask our team about the structural timber specifications to ensure you select the right timber for your project
- Quality assurance: CertiStruct22 meets a consistent quality and structural grade
- Supply reliability: Stocked at our Landsdale warehouse, ready for your project
- FSC® certified supply: Traceable, sustainable sourcing for projects with environmental requirements
Frequently Asked Questions
CertiStruct22 is a premium F22-graded, partially air-seasoned Merbau structural timber. It is graded to Structural Grade No. 1 under AS2082-2007 and is FSC® Chain of Custody Certified.
Yes. Merbau has a Class 3 marine borer durability rating (21–40 years) and Class 1 natural durability above ground, making it well-suited for jetty, wharf and near-marine structural applications.
CertiStruct22 is graded F22 (Structural Grade No. 1), with Strength Group S2 and Joint Group J2 classification.
Yes. CertiStruct22 Merbau is classified as resistant to termites and bushfire.
CertiStruct22 is available in a range of post, beam, bearer and decking sizes. (See common sizes listed above.) Custom and non-standard sizes may be available, contact Austim to discuss your project requirements.
Yes. CertiStruct22 is 100% FSC® Chain of Custody Certified, ensuring it has been sourced from responsibly managed forests.
Yes. Austim delivers across Western Australia, including Perth metro, South West WA, Mandurah, Rockingham, Yanchep and Northern WA. Contact our team to arrange delivery.
CertiStruct22 is a certified structural-grade Merbau product graded to F22 under Australian standards, with documented structural properties for specification purposes. It is pre-oiled with Intergrain Universal Oil and supplied to a consistent structural standard, making it suitable for engineered and specified structural applications.
Yes. Austim carries a full range of GL13 and GL17 laminated posts and beams alongside CertiStruct22. Contact the team for availability.
Download product range price list
Contact Us
Address: 252 Gnangara Rd, Landsdale, WA 6065
Phone: (08) 6558 1266
Email: sales@austim.com.au
Opening Hours
- Mon – Fri: 7.30am to 4.00pm
- Sat: Closed
- Sun: Closed
We are located in Landsdale, we can deliver anywhere in Western Australia including the South West, Northern WA, Perth, Welshpool, Mandurah, Rockingham, Yanchep and even further.
