Koninklijke Houthandel G. Wijma & Zonen B.V.
Okan

Okan

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Okan’s heartwood is yellow to yellow-brown with a more or less light to dark green, olive green tint, which can sometimes give off a coppery glow under the influence of light red-brown. On the crosscut surface, the thick growth rings can be clearly identified by their dark coloured edges. The sapwood is light pink and 50-75 mm thick, and is clearly differentiated in colour from the heartwood. When damp, Okan has an unpleasant smell, but is without taste or smell when dry.

Properties of this timber species

General
• Botanical name: Cylicodiscus gabunensis
• ATIBT name: Okan
• Other names: Denya

Strength class
• Okan (growing regions: Ghana and Cameroon) quality class Category 3/Tropical/NEN 5493 is classed in strength class D50 (NEN-EN 338)

Uses
• Because of its great durability, Okan can be used for exterior work, especially for hydraulic works such as lock gates, piling, harbour works and bridge supports
• It can be used anywhere where the requirements for strength and durability are high, for example, for sleepers, heavy structures and industrial floors
• Because of its attractive fine colour, it can be ideally used for decoratively turned goods
• In the UK, Okan is used as a substitute for Demerara Greenheart

Durability
• Resistance to fungi: class 1 (very durable)
• Resistance to insects: Termites class D (sapwood and heartwood very durable), the heartwood shows good resistance to the effects of pile worm in saltwater, Marine borers class D under Northern European conditions.

Density
• (800)-850-920-960-(1100) kg/m3 at 12% moisture content
• Fresh 1000-1200 kg/m3

source: Houtvademecum © 2010 Centrum Hout Almere, 10e herziene druk

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