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|Title: ||Cold and steam bending properties of some lesser-used species of Ghana|
|Authors: ||Ayarkwa, J.|
|Issue Date: ||2000|
|Publisher: ||Ghana Journal of Forestry|
|Citation: ||Ghana Journal of Forestry, vol. 9|
|Abstract: ||The cold and steam bending properties of six selected lesser-used timber species of Ghana have been studied, with a view to providing technical data for the furniture and glulam industries. Differences between timber species and thicknesses of bending lamella have been found to be statistically significant in cold bending of the six species (P=0.05). Denya (Cyligodiscus gabunensis) has been found to have superior cold bending qualities for all thicknesses studied, followed by Essia (Petersianthus macrocarpus), Ceiba (Ceiba pentandra), Awiemfosamina (Albizia ferruginea) and Kyenkyen (Antiaris toxicaria) in order of decreasing performance. Although in 9 nine thickness, Celtis (Celtis mildbraedii) is next to Denya, its performance in 12 and 25 nnn thickness is venj low. Thickness factors derived indicate that thickness effect is severe in all the species, with Celtis and Ceiba showing the rnuost severe effects. High density species also seem superior in cold bending properties to low density species. For steam bending, however, Celtis has best qualities, followed by Kyenkyen, Awiemfosamina, Denya, Essia and Ceiba in decreasing order. Whereas Ceiha's weakness under steam bending maybe attributed to its brittle wood fibres and high porosity, Celtis' superior quality may he due to its fine texture, low porosity and straight grains. Density does not seem to influence steam bending qualities of the six species. Apart from Kyenkyen and Awiemfosamina, all the species studied may be recommended for cold bending, and only Celtis for steam bending in the fuurniture and glulam industries.
Keywords: Cold and steam bending, Lesser-used species, Furniture, Glulam|
|Description: ||This article was published by Ghana Journal of Forestry in 2000.|
|Appears in Collections:||College of Architecture and Planning|
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