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Common Names
Common Uses
Countries of Distribution
Cutting Resistance
Drying Defects
Family Name
Grain
Heartwood Color
Kiln Drying Rate
Kiln Schedules
Movement in Service
Nailing
Natural Durability
Numerical Data
References
Regions of Distribution
Resistance to Impregnation
Response to Hand Tools
Sapwood Color
Scientific Name
Screwing
Strength Properties
Texture
Trade Name
Tree Size
Turning
Veneering Qualities

Scientific Name
Acacia richii

Trade Name
Qumu

Family Name
Leguminosae

Wood Image 1

Common Names
Qumu

Regions of Distribution
Oceania and S.E. Asia

Countries of Distribution  [VIEW MAP]
Fiji [Polynesia]

Common Uses
Agricultural implements, Boat building (general), Cabinetmaking, Flooring: industrial heavy traffic, Furniture, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Paneling, Sporting Goods, Toys, Turnery, Vehicle parts

Heartwood Color
Brown
Yellow
Orange
Red
Yellow to golden-yellow to orange
Brown
Red


Sapwood Color
Different than heartwood


Grain
Even
Figure
Straight
Distinct (figure)
Variable (figure)

Straight
Irregular color
Distinct figure


Texture
Medium
Medium


Natural Durability
Resistant to powder post beetles
Susceptible to insect attack
Non-durable
Perishable
Resistant to attack from powder post (Lyctid & Bostrychid) beetles
Non durable
Perishable


Kiln Schedules
Kiln Drying Rate (in days) is fairly rapid


Drying Defects
Checking
Distortion
Slight twist/warp
Slight surface checking


Kiln Drying Rate
Drying rate is fairly rapid to fast
Rapid
Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)


Tree Size
Bole length is 10-20 m
Sapwood width is 0-5 cm
Bole length is 20-30 m
Tree height is 50-60 m
Tree height is 60-70 m


Cutting Resistance
Fairly Difficult to Very Difficult to saw
Cutting Resistance with green wood is difficult
Cutting Resistance with dry wood is difficult


Movement in Service
Excellent Stability - Small Movement
Stable


Nailing
Pre-Boring Recommended
Possible if prebored


Resistance to Impregnation
Permeable sapwood
Resistant heartwood
Resistant sapwood
Sapwood is permeable
Heartwood is resistant


Response to Hand Tools
Easy to Work
Fairly Difficult to Difficult to Work
Moderate working qualities
Easy to machine


Screwing
Pre-boring recommended
Possible if prebored


Turning
Fairly Easy to Very Easy
Very Good to Excellent Results
Fairly Difficult to Very Difficult
Fair to Good Results
Turns with moderate ease
Good results
Easy to turn


Veneering Qualities
Suitable for peeling
Suitable for slicing
Difficult to veneer
Veneers easily
Veneers moderately easy
Suitable for slicing
Suitable for peeling
Easy to cut
Diifficult to veneer


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


Numerical Data
ItemGreenDryEnglish
Bending Strength1357620956psi
Density51lbs/ft3
Maximum Crushing Strength68999945psi
Shearing Strength2312psi
Stiffness220825461000 psi
Weight5041lbs/ft3
Radial Shrinkage2%
Tangential Shrinkage7%
ItemGreenDryMetric
Bending Strength9541473kg/cm2
Density817kg/m3
Maximum Crushing Strength485699kg/cm2
Shearing Strength162kg/cm2
Stiffness1551791000 kg/cm2
Weight801657kg/m3
Radial Shrinkage2%

References
Alston, A.S.,1966,Powder Post Beetle Lyctus Species,Fiji Forestry Department, Suva. Fiji timbers and their uses No.6

Bolza, E., Kloot, N.H.,1972,The Mechanical Properties of 56 Fijian Timbers,Australia C.S.I.R.O. Division of Forest Products Technological Paper,No.,62

Fiji Department of Forestry,1969,A Summary of the Properties of 34 Indigenous Timbers,Fiji Forestry Department, Suva. Fiji timbers and their uses No.38

Fiji Forestry Department,1970,The Properties and Potential Uses of Qumu (Acacia richii) A Summary of,C.S.I.R.O. Investigations,Fiji Timbers and their Uses No.51,,Department of Forestry, Suva, Fiji

Fiji Forestry Department,1981,The Properties and Uses of 43 Indigenous and Exotic Timbers,Fiji Forestry Department, Fiji Timbers and their Uses No.71

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,1









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