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BanutisBanutisBanutisBanutis
Banutis (Betula alnoides)

Family: Betulaceae

Common names: Banutis, Bhuj, Bhujpattra, Chambar maya, Dingleen, Haoul, Haur, Hlosunli, Indian birch, Kunis, Layang, Maksheri, Payan-utis, Payong, Phiypattra, Puya udish, Puzala, Sauer, Saur, Saver, Shag, Shagru, Shaul, Sheori, Utis

Distributed in: Burma, India, Nepal (Oceania and S.E. Asia)

Common uses: Boxes and crates, Furniture, Heavy construction, Light construction, Plywood, Turnery

Product sources: The tree is rather common throughout its growth range because its nut is harvested as a crop. The timber lacks any unique or outstanding features to warrant a high price on the international market. It is therefore not common on the European or N. American market. The timber is, however, a potential source of lumber for very large projects since it is capable of producing clear, very wide and very long boards.

Environment profile: Endangered

Tree size: Trunk diameter is 350-400 cm

Colors: the heart isWhite, Yellowand the sapwoodWhite, Yellow.The grain isWeak figure, the textureMediumand the lusterMedium

Natural durability: Resistant to marine borers, Susceptible to insect attack

Odor: Has a taste

Kiln Drying Rate: Rapid

Drying Defects: Resin Exudation, Splitting

Ease of Drying: Thick Stock Requires Care

Comments: General finishing qualities are rated as good

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Very Good to Excellent Results

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Fairly Easy to Very Easy, Very Good to Excellent

Planing: Fairly Easy to Very Easy

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Very Good to Excellent Results

Veneering qualities: Veneers easily, Veneers moderately easy

Steam bending: Fair to Good Results

Screwing: Fairly Easy to Very Easy, Very Good to Excellent Results; Turning: Very Good to Excellent Results

Painting: Poor to Very Poor; Polishing: Very Good to Excellent; Staining: Very Good to Excellent; Varnishing: Poor to Very Poor;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density kg/m3
Bending Strength 429 674 kg/cm2
Crushing Strength 275 449 kg/cm2
Hardness 451 kg
Impact Strength 68 cm
Shearing Strength 124 kg/cm2
Stiffness 95 110 1000 kg/cm2
Tangential Shrinkage 7 %
Radial Shrinkage 5 %
Weight kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 6111 9589 psi
Hardness 995 lbs
Impact Strength 27 inches
Maximum Crushing Strength 3916 6397 psi
Shearing Strength 1775 psi
Stiffness 1358 1568 1000 psi
Radial Shrinkage 5 %
Tangential Shrinkage 7 %
Volumetric Shrinkage 13 %

Shearing strength (parallel to grain) = low
Modulus of Elasticity (stiffness) = low
Max. crushing strength = medium
Hardness (side grain) = soft
Bending strength (MOR) = low
Toughness-Hammer drop (Impact Strength) = very low
Toughness-Hammer drop (impact strength) = medium
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Volumetic = fairly large
Shrinkage, Tangential = moderate
Shrinkage, Radial = fairly large
Shearing strength (parallel to grain) = medium

Gamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. LondonPearson, R.S., Brown, H.P.,1932,Commercial Timbers of India,Govt. Printer Calcutta,2 volsSekhar, A.C., Gupta, V.K.,1963,A note on the strength of Betula alnoides from West Bengal,Indian Forester 89(7) pp465-7
*Come interpretare i dati (manleva su eventuali imprecisioni)