In this short video, Jason Hinke of Northern Crossarm Company explains the difference between KDAT lumber and Green/Wet Pressure Treated Lumber.

Short, 15-minute Presentation.

To start the quiz, simply start below. The 20 questions below are based on the 15-minute presentation above. Once complete, hit the submit button, and we’ll follow-up with your score by email and next steps to receive your certificate.

Take the quiz as many times as needed for passing score.

Welcome to your KDAT Lumber Certification Quiz

Name

Company

Email

What does the acronym KDAT stand for?

Kiln Dried After Treatment

Kiln Dried Always Treated

Kept Dry After Treatment

Kiln Dampened After Treatment

The process of pressure treating lumber has been done similarly for many years.

True

False

After wood is treated, how long is KDAT lumber dried in a kiln to remove excess moisture?

1 week

1 hour

24-72 hours

8 hours

Because it's dried after treatment, KDAT lumber is lighter and smaller than wet/pressure treated lumber.

True

False

KDAT lumber is normally brought down to what moisture content?

81% moisture content

19% moisture content

50% moisture content

100% moisture content

Waves in composite deck boards are NOT a common occurrence when using wet/green treated framing.

True

False

If a wet/green treated deck board is installed, it's NOT likely to dry or shrink over time.

True

False

When you use green/wet treated lumber and return 6 months later, the joists and framing should be exactly where they were at install.

True

False

When you use KDAT lumber and return 6 months later, the joists and framing should be close to where they were at install.

True

False

A typical unit of lumber sent to a job site may have anywhere from 10-20% cull.

True

False

As part of quality control, a good KDAT lumber company will remove boards with cracks, twists, cups, etc.,

True

False

Why do KDAT lumber manufacturers put perf marks on the bottom of deck boards?

So the deck board cups down

So the deck board cups up

Because it's visually appealing

So it's easier to paint or stain

KDAT wood will never expand after it's been dried.

True

False

Unlike wet/green wood, you need to gap/space KDAT decking during install.

True

False

Wood decking, even quality KDAT will check and crack.

True

False

It is NOT recommended to apply a sealer after building with KDAT.

True

False

Applying a sealer to your KDAT lumber will minimize the checking and cracking in a deck.

True

False

With KDAT lumber, you don't have to wait to paint, stain or seal your finished deck.

True

False

With regular wet/green pressure treated wood, you don't have to wait to paint, stain or seal your finished deck.

True

False

Time's up

After you submit your test, we’ll reach out within 24-48 hours with your results, certificate (if passed), and your next steps! Please make sure to check your inbox as well as your “spam” or “junk” folder for a message from the KDAT Lumber Association (KDAT.ORG).

Email with next steps is on the way!