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Fornitori

Ditta 5
Indirizzo: via dei platani 4 liguria
Tel.: +39 456 5664 54

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Ditta 4
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Ditta 2
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Ditta 1
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Ditta 0
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Biress
Biress (Terminalia aemula)

Family: Combretaceae

Common names: Biress, Leh-heli, Mbambaro, Mbombaro, Mkurungu, Muhuku, Muumba, Mwangati, Terminalia

Distributed in: Kenya, Tanzania (Africa)

Common uses: Boat building (general), Bridge construction, Cabinetmaking, Flooring: industrial heavy traffic, Furniture, Heavy construction, Joinery, Mine timbers, Piling, Plywood, Railroad ties, Sporting Goods, Toys, Veneer

Colors: the heart isWhite, Yellow to golden-yellow to orangeand the sapwoodWhite, White to yellow.The grain isStriped figure, the textureFineand the lusterMedium

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

LightInduced Color Change: Darker

Kiln Schedules: UK=E US=T6D2/T3D1 Fr=5

Kiln Drying Rate: Slow (18-28 days for boards < 32 mm, to 52-84 days for boards >= 63 mm)

Drying Defects: No end splitting, Slight twist/warp

Comments: General finishing qualities are rated as good General finishing qualities are rated as poor

Cutting Resistance: Cutting Resistance with green wood is easy

Mortising: Difficult to mortise

Moulding: Difficult to mould

Movement in Service: Difficult to mould

Nailing: Holds nails well, Possible if prebored

Planing: Difficult to plane

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Easy to machine

Turning: Difficult to turn


  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 753 kg/m3
Bending Strength 754 1173 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness 752 kg
Impact Strength cm
Shearing Strength 170 kg/cm2
Stiffness 106 122 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 3 %
Weight 737 592 kg/m3
Maximum Load 0,63 0,84 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 10732 16695 psi
Density 47 lbs/ft3
Hardness 1658 lbs
Maximum Crushing Strength 6899 9945 psi
Shearing Strength 2419 psi
Stiffness 1512 1745 1000 psi
Work to Maximum Load 9 12 inch-lbs/in3
Weight 46 37 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 6 %

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

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchDale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards LondonMurira, K.,1984,Natural Durability Tests of Tanzanian Timbers 1955 - 1982,Tanzania Forestry Research Institute, Timber Utilisation Research Centre,,Moshi.Takahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Tanzania Forest Division,1966,Kiln Drying Schedules for Tanzania Timbers Technical Note no.38,Tanzania Forest Div. Util. Sec. MoshiTanzania Forestry Department,1963,Timbers of Tanganyika - Syzygium guineense,Tanzania Forestry Department, Utilisation Section, Moshi - Timbers of,TanganyikaTanzania Forestry Department,1966,Timbers of Tanganyika - Terminalia aemula,Tanzania Forestry Department, Utilisation Section, Moshi - Timbers of,Tanganyika
*Come interpretare i dati (manleva su eventuali imprecisioni)