Entandrophragma is a genus of twelve known species of deciduous trees in the family Meliaceae. Entandrophragma is restricted to tropical Africa. In a specimen of Entandrophragma excelsum towering more than 80 m was identified at Kilimanjaro. The fruit is a five-valved capsule containing numerous winged seeds. The timber of a few species is traded as a tropical hardwood.
|Published (Last):||3 December 2004|
|PDF File Size:||7.56 Mb|
|ePub File Size:||11.12 Mb|
|Price:||Free* [*Free Regsitration Required]|
The tree grows to a height of more than 50 m, with trunk diameter above up to cm. The bole is straight, cylindrical and clear to 32 m, occasionally fluted. Log is banned for international trading. Entandrophragma utile grows in moist deciduous primary forests, dry subtypes and transitional formations.
There are protected populations and felling limits in various countries. It is a long rotation species for plantation. Best results are obtained in evergreen dense forests in comparison with plantations in semi-deciduous forest. Wood diffuse porous. Tangential diameter of vessel lumina micras or more large. Brown-colored deposits in heartwood vessels. Non-vestured pits. Vessels per mm2 less than 6 rare. Simple perforation pl Axial parenchyma in marginal or in seemingly marginal bands.
Axial parenchyma in discontinuous tangential lines. Occasionally axial parenchyma storied. Prismatic crystals in non-chambered axial parenchy 4 to 10 rays per mm medium. Occasionally rays storied. Rays 1 to 4 seriate. Septate fibers present. Fibers with simple to minutely bordered pits. The sapwood is pinkish white, it has a thickness of 2 to 6 cm. The heartwood is red brown, slightly purplish, it is clearly demarcated.
The silver figure is medium. The grain is slightly but systematically interlocked; special care is needed when drying because of frequent risks of distortion. Because of its variable resistance it is considered as moderately durable to decay. Without treatment, it can be used when risks of occasional re-humidification; it is not suited for uses with risks of permanent or long-lasting humidification.
Silica Content: Negligible contents of silica are found in timber of this species. Amounts over 0. Silica Value: 0. Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: No particular risks of drying defects, subject to normal drying conditions.
Kiln Schedules: The kiln schedule has been tested. Menu Close. Trade Name Sipo. Scientific Name Entandrophragma utile Sprague. Botanical Description The tree grows to a height of more than 50 m, with trunk diameter above up to cm.
Natural Habitat Entandrophragma utile grows in moist deciduous primary forests, dry subtypes and transitional formations. Natural Distribution West and Central Africa. Plantations Available? Cites Status Unrestricted. Color The sapwood is pinkish white, it has a thickness of 2 to 6 cm. Grain The grain is slightly but systematically interlocked; special care is needed when drying because of frequent risks of distortion. Texture Texture is reported to be fine to medium.
Luster It is reported to be moderate in luster. Natural Durability Because of its variable resistance it is considered as moderately durable to decay. Internal Growth Stresses Residual growth stresses are absent. Silica Content Silica Content: Negligible contents of silica are found in timber of this species.
Resistance To Impregnation Nearly impossible to treat with a too much low penetration of the preservative substances. Basic Density or Specific Gravity O. Drying Defects Ease of Drying: Drying is moderately easy; some particular care is needed.
Sawing It is easy to saw. Rotary Veneer Cutting Suitable for slicing, also suitable for peeling if treated. Sliced Veneer Suitable for slicing, also suitable for peeling if treated. Blunting Effect Slight blunting effect; ordinary tools can be used for sawing and machining. Machining Machining of this species is reportedly easy. Planing Moderately easy; tools must be cautiously sharpened. Moulding Rather difficult; special tools are needed.
Turning Boring Rather difficult; special tools are needed. Mortising Rather difficult; special tools are needed. Nailing No particular problem.
Gluing Difficult to glue because of the extracts content. Sanding Easy to perform; it gives good results. Polishing Can be polished without surface preparation. Steam Bending Steam bending is difficult.
Response To Hand Tools No particular problems. General Housing 10 - Silica in Timbers. Beams 11 - Prospect: The wood database. Joists 12 - Tropical timbers of the world. Part I-Tropical American Species. Boards 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Flooring 14 - Handbook of Hardwoods. Parquet 15 - Empire Timbers.
Frames 16 - Woods of the World. Steps 17 - Tree Conservation Database. Fittings 19 - Silica in Timbers. Furniture Cabinets 21 - Tropical timbers of the world. Furniture, Luxury 22 - Dry kiln schedules for commercial woods. Cabinet 24 - Empire Timbers.
Turning 30 - Embassy of Honduras in Japan. Ornaments 31 - Embassy of Colombia in Japan.
SIPO (Entandrophragma utile)