Natural Timbers Flashcards
What are four different types of natural timbers?
Jarrah, Australian Oak, Radiata Pine, Douglas Fir
What is the scientific name of Jarrah?
Eucalyptus marginata
What is the scientific name of Australian Oak?
Eucalyptus obliqua
What is the scientific name of Radiata Pine?
Pinus radiata
What is the scientific name of Douglas Fir?
Pseudotsuga menziesii
What are the timber testing techniques used to determine performance and suitability to end use/purpose?
Hardness - Janka hardness test
Stiffness/elasticity - placing weights in the middle of a plank between two supports
Workability - planing, nailing, chiseling, cutting
What are the chemical properties of timber?
Flammable
What are the physical properties of Jarrah?
Medium-high strength, high density level, difficult workability and moderate blunting effect on blades
What are the physical properties of Australian Oak?
High strength, high density, difficult workability due to the timber splintering when cut
What are the physical properties of Radiata Pine?
Low strength, low density, relatively easy workability
What are the physical properties of Douglas Fir?
Medium strength, very low density, relatively good workability but blades must be kept sharp
What does Jarrah look like?
Jarrah trees grow to around 40m high and a trunk of 3m in diameter
The timber is a deep reddish-brown to light pink colour with subtle, yet distinct grains
How can Jarrah be used?
Railway sleepers, floorboards, fencing, outdoor furniture and joinery
What does Australian Oak look like?
Trees grow up to 90m high and a trunk of 3m in diameter
The timber is light in colour varying from a straw colour to a brown/red colour with straight and subtle grains
How can Australian Oak be used?
General construction, veneers, flooring and furniture
What does Radiata Pine look like?
Commercial trees grow to around 30m in height and a trunk of 1m in diameter
The timber is a pale yellow/white colour with slightly darker, straight grains
How can Radiata Pine be used?
Framing, plywood, veneers, construction and paper
What does Douglas Fir look like?
Grows to around 100m in height and a trunk of 4-5m in diameter
The timber is a pale yellow colour with a distinct straight, but slightly wavy grain
How can Douglas Fir be used?
Heavy construction, veneers, flooring, lining, joinery and turning
