CLC CLC Structural Carpentry & Framing

Question 1

What is the standard spacing for wall studs in residential construction?

Accepted Answer

16 inches on center

Answer

Residential wall studs are typically spaced 16 inches on center, though 24-inch spacing is also code-compliant in some applications.

Question 2

Which type of header is most commonly used above a load-bearing door opening?

Accepted Answer

Double 2×10 with 1/2-inch plywood spacer

Answer

A doubled 2×10 with a 1/2-inch plywood spacer is a common load-bearing header because it matches the wall thickness and provides adequate structural support.

Question 3

What is the purpose of a cripple stud in wall framing?

Accepted Answer

To fill the space above or below a rough opening

Answer

Cripple studs are short studs placed above headers or below sills to maintain standard stud spacing and provide nailing surfaces.

Question 4

In platform framing, the subfloor acts as a working platform for:

Accepted Answer

Framing the next level's walls

Answer

Platform framing gets its name because each floor's subfloor serves as a platform on which the next level's walls are framed and raised.

Question 5

What is the minimum bearing length for a floor joist resting on a wood sill plate?

Accepted Answer

2 inches

Answer

IRC and most building codes require floor joists to bear a minimum of 1.5 inches on wood and 3 inches on masonry, but 1.5 inches is the wood minimum per IRC R502.6.

(CLC) Certified Lead Carpenter Practice Test

(CLC) Certified Lead Carpenter Practice Test

CLC CLC Structural Carpentry & Framing