Directly from our own plantations in South Africa to your site. Over 65,000 Cloeziana piles to be supplied in 2025 and 2026.
You can purchase Cloeziana directly from the source, through a single supply chain managed by our group. Forever Forests Group is responsible for the sustainable planting of Eucalyptus cloeziana and grandis on FSC®100% certified plantations in South Africa. Margadant Wood is the processing and logistics specialist and the exporter: harvesting, sawmilling, grading, treatment and drying on site, and shipment to Europe. Wood Solutions imports and sells the timber internationally to contractors in hydraulic engineering and civil engineering, water authorities, specifiers, distributors and timber merchants.
This supply chain management means you know exactly where your piles come from and who has graded them. With every delivery, you will receive the FSC® certificate and the grading declaration from the manufacturer.
Cloeziana is the common name for Eucalyptus cloeziana, a species of eucalyptus native to Queensland, Australia, known in English as the Gympie messmate. The species grows straight and quickly and produces a dense, heavy hardwood. For the European market, Cloeziana is grown on plantations in South Africa; the timber supplied by Wood Solutions comes from the group’s own FSC®100% plantations, featuring proprietary genetics and full traceability right down to the plot.
The heartwood is naturally durable. Cloeziana requires no preservative treatment for use in soil, fresh water or salt water. This makes it a proven alternative to tropical hardwood from natural forests.
In 2024, SHR Wageningen classified Cloeziana round timber as strength class D70 in accordance with EN 338 and EN 14251 (report 23.0371). For the diameter class 160 to 180 mm, the characteristic values are: bending strength 72.3 N/mm², modulus of elasticity 20,047 N/mm²; according to SHR, larger diameters are at least equivalent. The density ranges from 875 to 950 kg/m³.
The natural durability of the heartwood falls within durability class 1 in accordance with NEN-EN 350. In practice, this means that Cloeziana is used without chemical treatment in structures that remain in contact with soil and water for decades. Treatment is optional, providing an additional margin of safety.
For use in salt water, there is one key question: can the timber withstand shipworm? This has been tested for Cloeziana. In the port of Herkingen, Cloeziana mooring piles were exposed to real-world conditions for 17 years; in 2024, SHR assessed the heartwood as resistant to shipworm (report 23.0493). In the Venice Lagoon, there have been around one hundred cloeziana mooring posts since 2010, which were found to be in perfect condition during the assessment in 2023. On the German Baltic Sea coast, five-year tests in breakwaters led to cloeziana being specified in tender documents for breakwaters there since 2010.
Anyone specifying azobé or other tropical hardwood from natural forests today is increasingly opting for Cloeziana. The facts at a glance: Cloeziana comes from 100% FSC®-certified plantations, is classified as D70 by SHR, falls within durability class 1, is resistant to pile worm and is supplied in accordance with the EUTR and EUDR. As the timber comes from our own plantations, supply security is guaranteed throughout the chain. For specifiers, cloeziana is therefore an equivalent alternative that meets the requirements for hydraulic engineering and scores higher in terms of origin and traceability.
Delft University of Technology (TU Delft) compared Cloeziana and Azobé using micro-drilling; you can receive this report, as well as the SHR reports, on request. Compare Cloeziana and Grandis based on test results.
We supply Cloeziana in three forms, all 100% FSC®-certified and graded in accordance with SANS 754:2019.
Round, 1.0 to 18.0 metres long and 50 to 400 mm in diameter, debarked, pointed on request. Milled Cloeziana piles: 1.0 to 12.0 metres in length, 100, 130, 150, 180, 200 or 220 mm in diameter. For mooring posts, sheet piling, jetties, foundations, bank protection and dyke reinforcement.
Thickness 20, 25 or 30 mm, width 100, 150 or 200 mm, length 1.0 to 5.0 metres, for sheet piling, quays and bank protection.
Beams and square sections ranging from 80 x 80 to 300 x 300 mm, up to 8.0 metres in length, air-dried to approximately 20 per cent moisture content.
In 2025 and 2026, Wood Solutions supplied over 65,000 Cloeziana piles, including 9,000 piles for the Amsteldijk dyke reinforcement project in the municipality of Nieuwkoop, 6,850 piles for the Stichtse Vecht dyke improvement project, over 10,000 piles for the Scheldestromen Water Board, 6,000 piles for the dyke reinforcement works at Heringsdorf and Süssau, and over 100 containers of piles for coastal protection at Graal-Müritz, Heiligendamm and Graswarder. Previous projects: Hiddensee (7,700 piles), Herkingen Marina and the Venice Lagoon.
Please email your enquiry to sales@woodsolutions.nl. We supply Cloeziana by the cubic metre and on a project-by-project basis, in accordance with tender specifications. Would you like to become a partner? Please email sales@woodsolutions.nl.
Cloeziana is the trade name for Eucalyptus cloeziana, a hardwood species native to Queensland (Australia) and grown for the European market on FSC®100% certified plantations in South Africa. The heartwood is naturally durable and has strength class D70.
D70, determined by SHR Wageningen in 2024 in accordance with EN 338 and EN 14251 (report 23.0371). Bending strength 72.3 N/mm² and modulus of elasticity 20,047 N/mm² for the diameter range 160 to 180 mm.
Durability class 1 in accordance with NEN-EN 350. The heartwood is used in soil, fresh water and salt water without the need for preservative treatment.
Yes. After 17 years in the port of Herkingen, SHR assessed the heartwood in 2024 as resistant to shipworm (report 23.0493). Cloeziana mooring piles have been in use in Venice since 2010.
In many cases, yes. Cloeziana has strength class D70 and durability class 1, comes from 100% FSC®-certified plantations and is supplied in accordance with the EUTR and EUDR. TU Delft compared both timber types using micro-drilling; that report is available on request. We would be happy to advise you.
Round piles from 1.0 to 18.0 metres in length and 50 to 400 mm in diameter, and milled piles from 1.0 to 12.0 metres in length and 100 to 220 mm in diameter. Pointed on request; bespoke sizes available.
NEN 5493:2010+C1:2011 (quality requirements for hardwood in civil engineering works, the Netherlands), NEN-EN 338 (strength class), NEN-EN 350 (durability) and NEN-EN 335 (service class). In Germany, DIN EN 12699 and DIN EN 1995-1-1 with national annex. Grading in accordance with SANS 754:2019.
Yes, 100% FSC® certified, certificates SCS-COC-000652-AY and SGSCH-COC-009190, with traceability back to the plantation.
Please email your enquiry to sales@woodsolutions.nl. We supply by the cubic metre and on a project-by-project basis, directly from The Hague.
Yes. The specification document for Cloeziana is a single A4 PDF containing a fully completed product specification: timber species, quality mark, quality requirements in accordance with NEN 5493:2010+C1:2011, durability class 1, use classes 4 and 5, strength class D70, dimensions, finishes and supporting documentation. You can download it from the Technical Reports page.
