Entandrophragma candollei

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Entandrophragma candollei
Wood sample of Entandrophragma candollei from the collection of the Institute Wood Research Johann Heinrich von Thünen Institute

Wood sample of Entandrophragma candollei from the collection of the Institute Wood Research Johann Heinrich von Thünen Institute

Systematics
Eurosiden II
Order : Sapindales (Sapindales)
Family : Mahogany (Meliaceae)
Genre : Entandrophragma
Type : Entandrophragma candollei
Scientific name
Entandrophragma candollei
Harms

Entandrophragma candollei belongs tothe  mahogany family (Meliaceae). It is distributed over all of West and Central Africa. In the trade it is known as Kosipo or Heavy sapele. The trade symbol according to DIN EN 13556 for this tree species is ENCN .

description

Habitus

Entandrophragma candollei reaches a height of 40–50 meters and has a trunk diameter of 0.6–1.2 meters. The trunk is usually straight and cylindrical, with buttress roots reaching up to 4 meters up the trunk. The trunk is free of knots up to a height of 25 meters.

bark

The bark is initially smooth and fibrous and later scaly and gray. Fresh sections of the bark are reddish in color and exude a gummy substance.

colour

The gray to yellowish gray sapwood is 5–8 cm wide and clearly distinguishes itself from the red-brown to purple-brown heartwood . The heartwood is usually darker than that of the Entandrophragma utiles .

Occurrence

The distribution area of Entandrophragma candollei extends over West and Central Africa . They are growing increasingly in countries such as Guinea, Angola, Ivory Coast, Nigeria, Cameroon, Congo and Uganda. Entandrophragma candollei prefers drier locations in the tropical lower rainforests, but it can also be found in the tropical rain-green forests. The penumbra tree is mostly broken in and occasionally clumps together. He is often associated with Sipo, Sapelli and Tiama.

Wood

Structural features

Entandrophragma candollei : microscopic view of the cross section
Entandrophragma candollei : microscopic view of the radial section
Entandrophragma candollei : microscopic view of the tangential section

Macroscopically, the growth zones, the vessels and the ribbon-shaped longitudinal parenchyma are clearly visible in cross-section. If you look at the arrangement of the vessels in cross-section on a microscopic level, you can see that it is a scattering pore. The average pore diameter is 210 µm, which is comparatively medium to large. The existing interlocking growth often causes very pronounced gloss streaks.

use

It is mostly used as veneer wood , knife wood, but also as peeling wood for the production of technical plywood for cladding in boat building, for containers and formwork panels. It is also used as construction wood indoors and outdoors for medium loads, for stairs, worktops and benches.

Machinability

Due to the alternating twist and the associated fiber deviation, some types of processing can lead to cracks, flaking or tears. Therefore, the wood must be dried particularly gently. During the drying process it should be noted that it should be done slowly and carefully, as the wood tends to swell and shrink.

Entandrophragma candollei is moderately hard, quite elastic and difficult to split. As a result, the tools can sometimes become very dull when working on the wood. It can be glued and varnished well, but its coarse structure makes it less suitable for polishing.

Mechanical properties
Parameter value unit
Bulk density 0.62 g / cm³
Compressive strength 57 N / mm²
modulus of elasticity 11800 N / mm²
Flexural strength 102 N / mm²
tensile strenght 78 N / mm²

import

Kosipo ( Entandrophragma candollei ) is often confused with Sapelli or Sipo . Fresh woods are at risk of frost, so imports should be avoided during the cold season.

In Germany, for example, individual blocks 8.0 meters long, 2.15 to 2.36 meters in diameter and 27 to 31 tons of mass were imported. It is also used as a substitute for red meranti, makore, keruing and mahogany.

Individual evidence

  1. ↑ a b c d e f Rudi Wagenführ: Wooden atlas. 6th edition, Carl Hansa Verlag, 2007, ISBN 978-3-446-40649-0 ., P. 409
  2. ↑ DIN EN 13556 nomenclature of the commercial timbers used in Europe, accessed on December 18, 2017.
  3. ↑ a b Klaus-Günther Dahms: Small wood dictionary. 4th edition, Wegra-Verlagsgesellschaft mbH Stuttgart, 1984, ISBN 3-921546-16-8 ., Page 57
  4. ↑ a b Klaus-Günther Dahms: Small wood dictionary. 4th Edition, WEGRA-Verlag GmbH, Stuttgart, 1984, ISBN 3-921546-16-8 ., P.58
  5. ↑ Hans Schafflützel: Wooden Atlas. 2nd revised edition of the book “Die Nutzhölzer in Wort und Bild”, Association of Swiss Master Carpenters and Furniture Manufacturers , Zurich, 1974, ISBN 3-85891-001-5 , p.65
  6. ↑ Rudi Wagenführ: wooden atlas. 6th edition, Carl Hansa Verlag, 2007, ISBN 978-3-446-40649-0 , p.410