CKD Construction Methods & Materials 2

Question 1

Under the IRC, what is the maximum depth of a notch in a load-bearing (exterior or bearing) wall stud?

Accepted Answer

25% of the stud width

Answer

The IRC limits notches in bearing studs to 25% of the stud width; non-bearing studs may be notched up to 40%.

Question 2

A client wants to remove part of a load-bearing wall to open the kitchen. What must be installed to carry the load across the new opening?

Accepted Answer

A properly sized header or beam

Answer

A header or beam sized for the span and load transfers weight to jack studs and down to the foundation.

Question 3

What is the recommended minimum deflection limit for a floor system receiving natural stone tile?

Accepted Answer

L/720

Answer

Industry guidelines (TCNA) call for L/720 under natural stone, stiffer than the L/360 used for ceramic tile.

Question 4

Why should a floating laminate or floating engineered-wood floor generally NOT be installed under base cabinets?

Accepted Answer

Cabinets pin the floor and stop it from expanding and contracting

Answer

Floating floors must move freely, and the weight of cabinets anchors them and causes buckling or gapping.

Question 5

For holes bored through a solid-sawn floor joist, which rule applies under the IRC?

Accepted Answer

Hole diameter may not exceed one-third of the joist depth and must be at least 2 inches from the top or bottom edge

Answer

The IRC limits bored holes to one-third of the joist depth and keeps them at least 2 inches from either edge.

CKD - Certified Kitchen Designer Practice Test