Chapter 3. Review Questions
Student Name:
5. A sample 8-foot-long 2 × 4 weighs 10 pounds. After drying in an oven, it
weighs 8 pounds. What was its moisture content before drying? In its original
condition, was it adequately seasoned for use as a structural framing member?
Ans:
The moisture content was 25% before drying. This means that it wasn’t properly
seasoned for use as a structural framing member. This is because wood bio
deteriorates when its moisture content is between 20% and 30%. So it being at 25%
means that it wasn’t ready for use as a structural framing.
8. Give the actual cross-sectional dimensions of the following pieces of
kiln-dried lumber: 1 × 4, 2 × 4, 2 × 6, 2 × 8, 4 × 4, 4 × 12.
Ans:
The actual cross-sectional dimensions are as follows:
- 1X4 = 3/4''X3½
- 2X4 = 1 ½ X 3 ½
- 2X6 = 1 ½ X 5 ½
- 2X8 = 1 ½ X 7 ¼
- 4X4 = 3 ½ X 3 ½
- 4X12 = 3 ½ X 11 ¼
11. Give three advantages of wood–plastic composites in comparison to solid
lumber. What are two common uses for wood–plastic composites?
Ans:
Three advantages of wood-plastic composites are that they are quality consistent, they
are resistant to moisture, and they are also not likely to have defects or distortions. Also,
two common uses for these materials are outside decks and for outdoor fencing and
railing.
12. What are three common structural panel products? What is the most
commonly available panel size (length and width)?
Ans:
The most common size for structural panel products is 4 X 8. Three common
structural panel products are for the floor, roof, and walls.
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