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Red river gum
Red river gum (Eucalyptus rostrata)

Family: Myrtaceae

Common names: Murray red gum, Queensland blue gum, Red gum, Red river gum, River gum, River red gum, Rostrata gom, Rostrata gum, Rostrata-gom

Distributed in: Australia, Bangladesh, Congo, India, Israel, Morocco, South Africa, Thailand (Africa, Oceania and S.E. Asia)

Distribution overview: Grows mainly on river banks, reaching its best development along the Murray River in New South Wales and Victoria in Australia. It is also widely distributed throughout south Australia and Queensland.

Common uses: Agricultural implements, Beams, Boat building (general), Boxes and crates, Bridge construction, Building construction, Cabin construction, Cabinetmaking, Charcoal, Concrete formwork, Construction, Decks, Domestic flooring, Factory construction, Factory flooring, Flooring, Flooring: commercial heavy traffic, Flooring: industrial heavy traffic, Form work, Foundation posts, Framing, Fuelwood, Furniture, Handles: general, Heavy construction, Interior construction, Joinery (external): ground contact, Joinery, Joists, Ladders, Light construction, Mine timbers, Paneling, Parquet flooring, Pile-driver cushions, Piling, Plywood, Porch columns, Posts, Railroad ties, Rough construction, Shipbuilding, Sporting Goods, Stairrails, Stairworks, Stringers, Sub-flooring, Tool handles, Toys, Turnery, Vehicle parts, Veneer, Wharf construction, Wheels

Environment profile: Status has not been officially assessed

Tree size: Tree height is 20-30 m

Colors: the heart isRed, Reddish brownand the sapwoodClearly differentiated from the heartwood, Different than heartwood.The grain isStraight, the textureUniformand the lusterLow

Natural durability: Resistant to attack from termites (Isoptera), Susceptible to attack from powder post (Lyctid & Bostrychid) beetles

Odor: No specific smell or taste

Kiln Schedules: Dry at a slow speed

Drying Defects: Slight surface checking, Splitting

Ease of Drying: Thick Stock Requires Care

Tree Identification: Bole/stem form is misshapen

Blunting Effect: Blunting effect on machining is moderate

Boring: Use very sharp cutting edges to prevent grain from tearing

Carving: Poor results

Cutting Resistance: Presence of gum

Gluing: May require surface treatment for best results

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Pre-Boring Recommended, Pre-boring recommended

Planing: Very sharp cutting edges are required to produce a smooth surface

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Responds rather poorly to hand tools

Routing recessing: Fairly Easy to Very Easy

Sanding: Satisfactory

Steam bending: Moderate Gum exudation is reported to prevent the use of the timber for steam bending

Screwing: Good screw holding properties, Pre-boring recommended; Turning: Very Good to Excellent Results

Polishing: Satisfactory;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,63 0,74
Density 849 kg/m3
Bending Strength 592 932 kg/cm2
Crushing Strength 73 114 kg/cm2
Hardness 821 kg
Impact Strength cm
Shearing Strength 140 kg/cm2
Stiffness 93 114 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 833 689 kg/m3
Maximum Load cm-kg/cm3
Toughness 105 cm-kg
Static Bending 370 598 kg/cm2
Item Green Dry English
Bending Strength 8432 13256 psi
Crushing Strength 1049 1627 psi
Density 53 lbs/ft3
Hardness 1812 lbs
Maximum Crushing Strength 4966 7858 psi
Shearing Strength 1997 psi
Static Bending 5272 8516 psi
Stiffness 1332 1635 1000 psi
Toughness 92 inch-lbs
Specific Gravity 0.63 0.74
Weight 52 43 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

Shrinkage, Radial = moderate
Shrinkage, Radial = fairly large
Density (dry weight) = 53-60
Shearing strength (parallel to grain) = medium
Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = low
Bending strength (MOR) = low
Shrinkage, Tangential = moderate
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shearing strength (parallel to grain) = very low
Max. crushing strength = high
Bending strength (MOR) = medium
Modulus of Elasticity (stiffness) = very low
Density (dry weight) = 46-52 lbs/cu. ft.

Australia - N.S.W. Forestry Commission,1988,Furniture Timbers of New South Wales,Forest Commission, N.S.W., Aust. Tech. Publication No.1Banks, C.H., Schoeman, J.P., Otto, K.P.,1977,The Mechanical Properties of Timbers with particular reference to South,Africa,South African Forestry Research Institute Bulletin,(Ed.,Schoeman, J.P. 1973 & Otto K.P. 1976,No.48Boas, I.H.,1947,The Commercial Timbers of Australia - Their Properties and Uses,Council for Scientific and Industrial Research, MelbourneBolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchBolza, E., Kloot, N. H. 1963. The Mechanical Properties of 174 Australian Timbers. Technological Paper No. 25. Division of Forest Products, Center for Scientific and Industrial Organization (CSIRO, Melbourne, Australia.Hillis, W.E. and A.G. Brown, Editors. 1984. Eucalyptus for Wood Production. Commonwealth Scientific and Industrial Research Organization, Academic Press, Australia.Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc., Fresno, California.Sattar, M.A. and Bhattacharjee, D.K.,1990,Physical and Mechanical Properties of Eucalyptus camaldulensis,Bangladesh Forest Research Institute, Chitttagong, Bulletin 12 Timber,Physics SeriesScott, M.H.,1935,Weights of South African Growth Timbers,South African Department of Agriculture and Forestry Bulletin,No.145,Forest Products Institute, Forestry Series No.1Scott, M.H.,1953,Utilisation Notes on South African Timbers,South African Forestry Department Bulletin No.36Shukla, N.K. and Rajput, S.S.,1983,Physical and Mechanical Properties of Eucalypts grown in India,Indian Forester 109(112) 933-43Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7The Australian Timber Journal & Building Products, Merchandiser,1969,Timber Durability and Preservation,Supplement to Australian Timber Journal 35(4) Tech. Timb. Guide No.8Wallis, N.K. 1956. Australian Timber Handbook. Sponsored by The Timber Development Association of Australia. Angus & Robertson, Ltd., 89 Castlereagh Street, Sydney, Australia.Yoji Kikata (ed.,1991,The promotion of Lesser-known Species and Plantation-grown species,Proceedings of the International Forest Products Workshop, 14 to 15,October, 1991, Nagoya University, Japan
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