Myristica chartacea (Kaudamu)


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Scientific Name
Myristica chartacea

Trade Name
Kaudamu

Family Name
Myristicaceae

Common Names
Darah darah, Duguan, Kaudamu, Kumpang, Mutwinda, Penarahan, Tambolau

Regions of Distribution
Oceania and S.E. Asia

Countries of Distribution  [VIEW MAP]
Fiji [Polynesia], Fiji, Indonesia, Malaysia, Philippines

Common Uses
Balusters, Bedroom suites, Boxes and crates, Building construction, Building materials, Cabinetmaking, Carvings, Casks, Chairs, Chests, 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, Furniture , Furniture components, Furniture squares or stock, Furniture, Handles: general, Hardboards, Hatracks, Interior construction, Joinery (external): ground contact, Joinery, Kitchen cabinets, Ladders, Light construction, Living-room suites, Moldings, Office furniture, Packing cases, Paneling, Particleboard, Plywood, Tool handles, Toys, Turnery, Vehicle parts, Veneer

Environmental Profile

Questionable
Extinct
Endangered
Status has not been officially assessed

Distribution Overview
Species in the Myristica genus are reported to occur in the Indo-Malayan region, Indonesia, the Philippines, and Western Pacific Islands.

Heartwood Color

Yellow
Red
Pink
Orange
Pale red to pink
Pale brown
Light brown

Sapwood Color

Yellow
Pink
White to yellow
Different than heartwood
Darkens with exposure
Cream/Pale brown

Grain

Straight
Even

 

Straight

Wood has a plain appearance without features

Texture

Very fine
Medium
Even textured

Luster

High

Natural Durability

Durable
Susceptible to attack from powder post (Lyctid & Bostrychid) beetles
Perishable
Sapwood is susceptible to wood staining fungal attack
Non durable
Heartwood is susceptible to wood staining fungal attack
Susceptible to marine borer attack
Susceptible to attack from termites (Isoptera)
Pinworms (ambrosia beetles) are commonly present
Highly susceptible to attack by subterr. and dry wood termites
Highly susceptible to attack by pinhole borers
Highly susceptible to attack by marine borers

Logs should be removed quickly from the forest after felling to prevent degrade from blue- and yellow-stain.

Odor

No specific smell or taste

Kiln Schedules

T10 – D4S (4/4) US
Kiln Drying Rate (in days) is rapid

Drying Defects

Checking
Distortion
Slight collapse and honeycomb
Moderate surface checking
Surface checking and slight collapse are common

Ease of Drying

Thick Stock Requires Care
Reconditioning Treatement
Fairly Easy
Requires special attention
Moderate
Requires care to minimize degrade
Mild kiln schedules recommended to minimize drying defects
Might require reconditioning treatment

The timber requires carefully controlled drying conditions to prevent degrade. Mild kiln schedules are recommended, and a short reconditioning treatment may be necessary to remove collapse.

Kiln Drying Rate

Rapid (<10 days for boards < 32 mm, to <30 days for boards >= 63 mm)

Tree Size
Boles are described as often straight and cylindrical.

Product Sources
Kaudamu is the trade name of timber produced by four Myristica species in Fiji. The timbers are very similar and are often mixed and marketed together under the same trade name.

Boring

Fairly difficult to very difficult
Both green and seasoned material bore easily

Carving

Fairly Difficult to Very Difficult
Good results

Cutting Resistance

Cutting Resistance with green wood is easy
Cutting Resistance with dry wood is easy
Yields smooth clean surfaces
Fairly easy to saw

Mortising

Fairly Difficult to Very Difficult
Easy to mortise

The material is reported to mortise easily with ordinary tools to produce clean surfaces

Moulding

Fairly Difficult to Very Difficult
Very good moulding properties
Good finishing results

Nailing

Nails hold poorly

Planing

Fairly Difficult to Very Difficult
Planes well, to a good finish
Easy to plane
Yields clean surfaces

Resistance to Impregnation

Sapwood is resistant
Moderately permeable to preservative treatment
Heartwood is resistant

Resistance to Splitting

Poor
Good

Response to Hand Tools

Responds Poorly
Fairly Difficult to Difficult to Work
Easy to machine
Responds well to hand tools

Routing & Recessing

Fairly Difficult to Very Difficult
Good in both routing and recessing.

Sanding

Good sanding properties

Turning

Fairly Difficult to Very Difficult
Yields clean surfaces
Easy to turn

Veneering Qualities

Easy to cut

Polishing

Good results

Strength Properties

Max. crushing strength = medium
Bending strength (MOR) = low
Density (dry weight) = 31-37 lbs/cu. ft.
Modulus of Elasticity (stiffness) = very low
Shrinkage, Tangential = large
Shrinkage, Radial = large
Modulus of Elasticity (stiffness) = low
Shrinkage, Tangential = fairly large
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = low
Density (dry weight) = 38-45 lbs/cu. ft.
Very dense
Shrinkage, Tangential = moderate
Shrinkage, Radial = moderate
Modulus of Elasticity (stiffness) = medium
Max. crushing strength = low
Heavy
Compression strength (parallel to grain) = high
Bending strength (MOR) = medium

The bending strength of air-dried wood of the species is similar to that of Teak, which is considered to be strong. Teak, White oak, and Hard maple have high crushing strength. It is moderately hard and resistant to wearing and marring

Numerical Data

Item Green Dry English
Bending Strength 6929 11965 psi
Crushing Strength 529 1068 psi
Density 37 lbs/ft3
Hardness 864 lbs
Impact Strength 23 inches
Maximum Crushing Strength 3534 6740 psi
Shearing Strength 1395 psi
Static Bending 3783 7771 psi
Stiffness 1270 1698 1000 psi
Toughness 81 inch-lbs
Specific Gravity 0.43 0.48
Weight 36 29 lbs/ft3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 12 %
Item Green Dry Metric
Bending Strength 487 841 kg/cm2
Crushing Strength 37 75 kg/cm2
Density 592 kg/m3
Hardness 391 kg
Impact Strength 58 cm
Maximum Crushing Strength 248 473 kg/cm2
Shearing Strength 98 kg/cm2
Static Bending 265 546 kg/cm2
Stiffness 89 119 1000 kg/cm2
Toughness 93 cm-kg
Specific Gravity 0.43 0.48
Weight 576 464 kg/m3
Radial Shrinkage 4 %
Tangential Shrinkage 8 %

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

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

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,1966,The Properties and Potential Uses of Kaudamu (Myristica species) A Summary,of C.S.I.R.O. Investigations,Fiji Timbers and their Uses No. 11, 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