A STUDY OF PROSPECTS AND PROBLEMS OF TIMBER AS EXTERNAL MATERIAL IN BUILDING PRODUCTION IN HOT CLIMATE REGION
1.1 BACKGROUND OF THE STUDY
Timber an external material in building production simply means using timber on the external part of the building such as timber work covering, timber external walls, and timber external windows, doors and frames.
Timber use practices in building production industry is endowed with a variety of tree species in her nature forests and in recent years there has been an increase in the establishment of exotic trees species such as pine and eucalyptus on plantations. Despite the abundance of wood resources, wood has been under-utilized with a view that it is material to be avoided due to its perceived unreliability, variability and unknown properties.
Generally, timber research has been academic and has concentrated on a few tree species, resources have not explored the key indicators of wood strength such as bending stiffness and bending strength, they have concentrated on density which has been reported as poor surrogate strength. This is purely the reason timber users cannot accept lesser-known timber. Limited studies have been done to predict the allowance load from bad deflection relationship. This is probably the reason timber users prefer timber with proven track record, a practice which unfortunately exerts pressure on well-known timber species leading to their building environment coupled with population growth and dwindling wood resources globally necessitates research into optional use of multiple trees species with quality control procedures.
The aim of the study was to examine timber use practices with emphasis on analysing weakness and strength in the application of wood as an external material in building.
Timber is a cellular material consisting of minute cell called fibre or trenched which have inter-communicating pits or values that allow water and solutions to be conducted throughout the structure.
The word timber described wood, which has been cut for use in building. Timber has many advantages as a building material. It is high weight material that is easy to cut, shape and join by relatively cheap and simple hand or power operated tools in the production of timber. Timber is used all parts of building such as farm work, doors and windows, frames, timber, wall plates, floors and also in roof carcass