12 Days of Quizzes

Day 1 - Treated Lumber Quiz

The holiday season is upon us.

While many of your friends are out at Christmas parties, you are focused on your career and passing the California Supplemental Exam (CSE) for landscape architects.

Christmas Gift for Landscape Architect Candidates

My Christmas gift to all of you working hard to pass the CSE is a quiz a day for the next 12 days.

On the First Day of Christmas…

On the First Day of Christmas, my true love gave to me a partridge in a pear tree…

Well, partridges are not native to California. If they were, you would probably need a CEQA review to ensure your project did not affect their habitat. Instead of the partridge, lets focus on the tree.

Quiz 1: Treated Lumber

Trees are precious and handy for shade, reducing the urban heat island affect, increasing property values, and provide homes for wildlife.

Trees also churn out useful building materials that benefit landscape architects and our clients.

Regrettably, most lumber is not naturally rot resistant.

Pressure-treated lumber is the answer for long-lasting wood that can survive prolonged exposure to weather and the elements.

Day 1 Quiz - Treated Lumber Questions

The following questions will test your knowledge of treated lumber.

1. Why should treated lumber be used outdoors?

 treated lumber resists decay better than untreated pine or Douglas fir
 insects are less likely to infest treated lumber
 treated lumber will last longer than untreated lumber
 all the above

2. Which types of wood preservatives are currently used for treated lumber?

 a. Chromated copper arsenate (CCA)
 b. Alkaline copper quaternary (ACQ)
 c. Copper azole
 d. b and c only
 e. all the above

3. Which industry organization is responsible for labeling treated lumber in the United States?

 United States Green Building Council (USGBC)
 American Wood Protection Association (AWPA)
 American Forest and Paper Association (AFPA)
 Southern Forest Products Association (SFPA)

4. Why was chromated copper arsenate (CCA) banned as a method for treating lumber for residential and commercial use in the early 2000’s by the EPA?

 the green color created by the treatment process was considered unacceptable
 copper was toxic to protected fungi species
 arsenic compounds were leaching from the wood and posed a health and environmental threat
 all treated wood was banned due to environmental damage caused during the treatment process

5. What types of metal fasteners and hardware are recommended for use with treated lumber? Select all that apply.

 mild steel components
 copper screws and nails
 hot-dipped galvanized metal hardware
 stainless steel

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About John

John is a landscape architect who is currently preparing to take the California Supplemental Exam to become licensed in California. He is currently a licensed professional landscape architect in Georgia and Florida. John graduated from California State University, Pomona with a BSLA degree in landscape architecture in 1997 and has extensive practice experience in residential and commercial landscape design.