Building Materials: Lumber Grading and Defects

Front

TRUE or FALSE:
Wood products used for building materials are often grown in managed forests and harvested by sawyers, equipment operators and sawmill workers

Back

TRUE

Front

TRUE or FALSE: Most wood products such as dimensional lumber like 2"x4" or 4"x 4" are milled from raw materials harvested from the forests of North America

Back

TRUE

Front

TRUE or False:
Knots are found in most grades of lumber.

Back

TRUE

Front

A kiln is like a huge oven. It is used for what purpose?

Back

Drying out lumber in a slow and controlled environment

Front

Building materials made from forest products are treated with preservatives to prevent them from....

Back

molding, decaying or suffering damage from insects

Front

TRUE or FALSE: Forest products commonly used for construction purposes are milled and manufactured before being transported to lumber yards and hardware stores. These products include studs, planks, boards and beams.

Back

TRUE

Front

Which of the following shows a twist in lumber?

Back

Front

Which of the following shows a shake in lumber?

Back

Front

Which of the following shows a bow in lumber?

Back

Front

Which of the following shows a bow in lumber?

Back