QUESTION FOOR a) State any six charactcristics that make timber a good construction matcrial (6Marks). b) With aid of sketches describe the following methods of timber conversion (sawing). i) Through and through (2Marks) ii) Quarter cut (2Marks) iii) Billet (2Marks)

a) Six characteristics that make timber a good construction material are:<br /><br />1. Strength and durability: Timber is a strong and durable material that can withstand heavy loads and resist decay and insect damage.<br /><br />2. Insulation properties: Timber has good insulation properties, which helps in maintaining the temperature inside the building and reducing energy consumption.<br /><br />3. Versatility: Timber can be used in various construction methods, such as framing, flooring, roofing, and cl making it a versatile material.<br /><br />4. Sustainability: Timber is a renewable resource, as trees can be replanted and grown over time. It is also a sustainable material as it reduces the carbon footprint of construction.<br /><br />5. Aesthetic appeal: Timber has a natural beauty and can be used to create a warm and cozy atmosphere in the building.<br /><br />6. Cost-effectiveness: Timber is relatively inexpensive compared to other construction materials, making it an affordable option for building construction.<br /><br />b) i) Through and through sawing:<br />In through and through sawing, the log is cut lengthwise into boards. The grain of the wood runs parallel to the length of the board. This method is commonly used for producing long and straight boards.<br /><br />ii) Quarter cut sawing:<br />In quarter cut sawing, the log is cut into quarters and then each quarter is cut lengthwise into The grain of the wood runs perpendicular to the length of the board. This method is commonly used for producing boards with a straight grain pattern.<br /><br />iii) Billet sawing:<br />In billet sawing, the log is cut into small blocks or billets, and then each billet is cut lengthwise into boards. The grain of the wood runs parallel to the length of the board. This method is commonly used for producing small and irregularly shaped boards.