Endospermum Macrophyllum (Kauvula)


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Scientific Name
Endospermum macrophyllum

Trade Name
Kauvula

Family Name
Euphorbiaceae

Common Names
Ekor belangkas, Gubas, Kauvula, Sendok sendok, Sesendok, Terbulan

Regions of Distribution
Oceania and S.E. Asia

Countries of Distribution  [VIEW MAP]
Fiji [Polynesia], Fiji

Common Uses
Agricultural implements, Balusters, Bedroom suites, Boxes and crates, Broom handles, Building construction, Building materials, Cabinetmaking, Carvings, Chairs, Chests, Coffins, Concealed parts (Furniture), Construction, Core Stock, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory flooring, Figured veneer, Fine furniture, Floor lamps, Flooring, Food containers, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Interior construction, Interior trim, Joinery, Kitchen cabinets, Light construction, Living-room suites, Matches, Millwork, Moldings, Musical instruments, Office furniture, Paneling, Parquet flooring, Plain veneer, Plywood, Pulp/Paper products, Tool handles, Toys, Turnery, Veneer

Environmental Profile

Vulnerable
Abundant/Secure
Status has not been officially assessed

Distribution Overview
Fiji, in particular.

Heartwood Color

Red
Brown
Pink
Purple
Black
Yellow to golden-yellow to orange
White to cream
Pale cream
Pale brown
Light brown
Brownish buff

Sapwood Color

White
Yellow
Pink
Green/Grey
Brown
Color not distinct from heartwood

Grain

Straight
Interlocked
Even

 

Straight
Interlocked

Texture

Fine
Medium
Coarse
Medium to coarse
Medium
Coarse

Luster

Medium
High
Lustrous

Natural Durability

Susceptible to insect attack
Moderately durable
Non-resistant to powder post beetles
Non-resistant to termites
Durable
Resistant to termites
Non-durable
Non-resistant to marine borers
Perishable
Non-resistant to pinhole borers
Resistant to powder post beetles
Susceptible to attack from powder post (Lyctid & Bostrychid) beetles
Perishable
Non durable
Very little natural resistance
Susceptible to pinhole borer
Susceptible to marine borer attack
Susceptible to blue stain
Susceptible to attack from termites (Isoptera)
Susceptible to attack by marine borers and termites
Pinworms (ambrosia beetles) are commonly present
Heartwood is susceptible to wood staining fungal attack

Sawn timber is readily attacked by longhorn beetle.

Odor

Has a taste
No specific smell or taste

Toxicity

Some toxic effects

Kiln Schedules

Drying (speed) is fast

Drying Defects

Distortion
Splitting
Checking
Collapse
Internal Honeycombing Possible
Slight surface checking
Warping can be expected
Checking

Warping can be severe in stock containing tension wood

Ease of Drying

Variable
Moderately Difficult to Difficult
Rapidly
Fairly Easy
Slowly
Easy
Radial and tangential shrinkage from 1-2%
Little degrade if dried properly
Dries at a fairly rapid rate

Kiln Drying Rate

Naturally dries quickly
Naturally dries slowly
Naturally dries at a moderate speed
Drying rate is fairly rapid to fast

Tree Identification

Bole/stem form is buttressed

Tree Size

Sapwood width is 5-10 cm
Bole length is 30-40 m
Trunk diameter is 150-200 cm
Tree height is 40-50 m
Bole length is 20-30 m
Tree height is 50-60 m
Sapwood width is 10-15 cm
Trunk diameter is 100-150 cm
Tree height is 60-70 m
Bole length is 10-20 m
Sapwood width is 0-5 cm
Trunk diameter is 200-250 cm
Trunk diameter is 250-300 cm
Trunk diameter is 350-400 cm
Tree height is 30-40 m

Heavy buttresses, occasionally reaching 60 inches (150 cm).

Certified Source

Certified Source

Comments
Abnormal Wood Tissue – Tension wood may be present in timber from leaning or crooked trees.

General finishing qualities are rated as good

Blunting Effect

Little
Moderate

Boring

Fair to good results
Fairly easy to very easy
Easy

Carving

Fairly Easy to Very Easy
Fair to Good Results
Very good results

Cutting Resistance

Easy to saw
Cutting Resistance with dry wood is easy
Cutting Resistance with green wood is easy
Low resistance

Sawn surfaces of material containing tension wood may be woolly.

Gluing

Fairly Easy to Very Easy
Fair to Good Results

Mortising

Fairly Difficult to Very Difficult
Fairly Easy to Very Easy
Fair to Good Results
Good mortising properties

Moulding

Fairly Difficult to Very Difficult
Fairly Easy to Very Easy
Fair to Good Results
Moulds well and readily

Movement in Service

Fair to Good Stability – Medium Movement

Nailing

Fairly Easy to Very Easy
Fair to Good Results
Very Good to Excellent Results
Nails hold poorly

Planing

Fairly Difficult to Very Difficult
Fairly Easy to Very Easy
Fair to Good Results
Planes to a smooth surface
Easy to plane

Resistance to Impregnation

Resistant heartwood
Resistant sapwood
Heartwood is permeable
Easily treated by pressure impregnation and open-tank processes

Resistance to Splitting

Poor

Response to Hand Tools

Easy to Work
Responds Readily
Fairly Difficult to Difficult to Work
Easy to machine
Responds well

Routing & Recessing

Fairly Easy to Very Easy
Fair to Good Results
Very good in both routing and recessing

Sanding

Very Good to Excellent Results
Fairly Easy to Very Easy
Yields smooth, clean surfaces
Easy to sand

Screwing

Fairly Easy to Very Easy
Fair to Good Results
Very Good to Excellent Results

Turning

Fairly Easy to Very Easy
Fair to Good Results
Very Good to Excellent Results
Easy to turn
Very good

Veneering Qualities

Suitable for peeling
Veneers easily
Suitable for slicing
Veneers moderately easy
No drying degrade
No steaming needed during bolt preparation.
No drying degrade. Dries flat without splitting
Easy to cut
There is slight to moderate drying degrade and the potential for buckles and splits
Suitable for slicing

Steam Bending

Poor to Very Poor Results
Unsuitable
Fairly Difficult to Very Difficult

Painting

Fair to Good Results
Fairly Easy to Very Easy

Polishing

Fair to Good Results
Very Good to Excellent Results
Fairly Easy to Very Easy

Staining

Fair to Good Results
Very Good to Excellent Results
Fairly Difficult to Very Difficult

Varnishing

Fair to Good Results
Fairly Easy to Very Easy

Strength Properties

Density (dry weight) = 31-37 lbs/cu. ft.
Max. crushing strength = medium
Bending strength (MOR) = low
Modulus of Elasticity (stiffness) = low
Shrinkage, Radial = very small
Shearing strength (parallel to grain) = low
Shrinkage, Tangential = small
Shrinkage, Tangential = very small
Shearing strength (parallel to grain) = very low
Modulus of Elasticity (stiffness) = very low
Density (dry weight) = 23-30 lbs/cu. ft.
Modulus of Elasticity (stiffness) = medium

Numerical Data

Item Green Dry English
Bending Strength 6918 10540 psi
Crushing Strength 505 902 psi
Density 31 lbs/ft3
Hardness 652 lbs
Maximum Crushing Strength 3800 6419 psi
Shearing Strength 1315 psi
Static Bending 4047 6399 psi
Stiffness 1434 1565 1000 psi
Toughness 80 inch-lbs
Specific Gravity 0.34 0.41
Weight 28 25 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 5 %
Item Green Dry Metric
Bending Strength 486 741 kg/cm2
Crushing Strength 35 63 kg/cm2
Density 496 kg/m3
Hardness 295 kg
Maximum Crushing Strength 267 451 kg/cm2
Shearing Strength 92 kg/cm2
Static Bending 284 449 kg/cm2
Stiffness 100 110 1000 kg/cm2
Toughness 92 cm-kg
Specific Gravity 0.34 0.41
Weight 448 400 kg/m3
Radial Shrinkage 2 %

References
Alston, A.S.,1966,Natural Heartwood Durability,Fiji Forestry Department, Suva. Fiji timbers and their uses No. 2

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

Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.

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 Department of Forestry,1972,Guide to the use of local timbers,Fiji Forestry Department, Suva. Fiji timbers and their uses No.55

Fiji Forestry Department,1967,The Properties and Potential Uses of Buabua (Fagraea gracilipes) A Summary,of C.S.I.R.O. Investigations,Fiji Timbers and their Uses No. 14, Department of Forestry, Suva, Fiji

Fiji Forestry Department,1967,The Properties and Potential Uses of Kauvula (Endospermum macrophyllum) A,Summary of C.S.I.R.O. Investigations,Fiji Timbers and their Uses No.19, Department of Forestry, Suva, Fiji

Fiji Forestry Department,1969,Timbers for Flooring A Note on Current & Potential Species,Fiji Timbers and their Uses No.36, 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

Smitinand, T., Et al,1980,A Manual of Diplerocarpaceae of Mainland South-East Asia,Forest Department, Thailand