Building Materials: Lumber

TRUE or FALSE:

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

• FALSE

• TRUE

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

• TRUE

• FALSE

Lumber is graded and sorted by

• Wood Grain

• Thickness

• Color

• Length

• Width

TRUE or False:

Knots are found in most grades of lumber.

• FALSE

• TRUE

What are some of the natural defects found in wood products?

• Cracks and splits

• Wanes and knots

• Warping, cupping and twists

• All of the above

Warping in wood products is caused by....

• Rapid drying

• Excessive moisture

• Splits or cracks in the wood

• All of the above

TRUE or FALSE:

Dry rot is the breakdown of wood caused by a wood‑destroying fungus.

• FALSE

• TRUE

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

• Cooking lunch for the mill workers

• Baking treats for the beavers and bears of the forest

• Making ceramic dishes for the heavy equipment operators

• Drying out lumber in a slow and controlled environment

Building materials made from forest products are treated with preservatives to prevent them from....(fill in the blank)

• turning into pine cones

• running away to the join the circus

• molding, decaying or suffering damage from insects

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.

• TRUE

• FALSE