Ironbark
Eucalyptus drepanophylla, E. paniculata
Other names: Grey Ironbank
Distribution and Availability
E. drepanophylla is found from northern New South Wales to Bundaberg, Queensland. E. paniculata is found in New South Wales from Bega to Coffs Harbour.
General Description
As the name indicates, ironbark is exceptionally hard. The heartwood ranges from reddish-brown to dark brown. The sapwood is lighter in colour, sometimes almost appearing white. Grain is tight and straight.
Physical & Mechanical Properties
A particularly hard, strong and durable timber, with a broad range of applications thanks to its resistance to lyctid borers and termites.
Working Properties
Ironbark is commonly used in engineering applications as a sawn and round timber thanks to its class 1 strength and durability ratings. Ironbark performed well in extensive fire testing and has been designated suitable as a building timber in Australia.
Durability
Ironbark is strong and durable, making it ideal for a range of structural, exterior and interior applications detailed here.
Main Uses
Ironbark’s versatility means it is prized for engineering, and is used for structural, exterior and interior applications. It can be used for wharf and bridge construction, railway sleepers, cross arms, poles, piles and mining timbers. Unseasoned, Ironbark timber is excellent for general house framing, while seasoned and dressed is used for cladding, internal and external flooring, linings and joinery. It is perfect for fencing, landscaping and retaining walls.
Ironbark is often used for decorative projects such as outdoor furniture, turnery and joinery, although it is not idea for projects requiring fine detail.
Ironbark’s versatility includes boat building (keel and framing components, planking), and was especially regarded for use in the hulls of early ice-breaker ships. Coach, vehicle and carriage building, agricultural machinery, mallet heads, mauls and bearings, sporting goods (croquet mallets, parallel bars) and bowling ninepins have all been produced using grey ironbark.
Other Information
Ironbark is a very heavy timber, at 1120 kilograms per cubic metre. This makes it dense and can be difficult to work pleasingly. Dressed surfaces take on a steely sheen.
