TREE UTILIZATION AND PRODUCTS
WOOD PROPERTIES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Through-and-through
|
|
|
Quarter sawn
|
|
|
Boxed heart
|
|
|
Tangential
|
Detailed explanation-1: -Quarter sawn – This is the most expensive method of conversion because it produces the best quality wood and is ideal for joinery purposes. This is because the boards are radial sawn and have very little tendency to shrink or distort.
Detailed explanation-2: -Quarter-sawn or radially converted timber is produced by sawing or cleaving the log multiple times from the bark to the centre, producing thin, triangular sections. The bark and sapwood are trimmed off leaving boards that tend to stay flat and not split as they season.
Detailed explanation-3: -There are three common methods of timber conversion as follows: Through & Through Sawing. Tangential Sawing. Quarter Sawing.
Detailed explanation-4: -Ordinary sawing: The log is moved backward and forward on the platform of a sawmill. Radial sawing: The sawing did parallel to the medullary rays and perpendicular to the annular rings. Tangential sawing: The sawing is done at right angles to the medullary rays and tangential to the annular rings. Quarter sawing: 30-Nov-2019