Framing Floors PT2

What is the typical on-center spacing for floor joists?

• 12 inches

• 16 inches

• 20 inches

• 24 inches

How is the 16-inch on-center spacing maintained when two joists lap in the center?

• By using a 13-inch block nailed between them.

• By nailing the joists directly to each other.

• By using metal straps to connect the joists.

• By offsetting the joists by 2 inches.

What is the purpose of adding extra joists to the floor framing?

• To increase the overall strength of the subfloor.

• To support interior walls that run parallel to the main joists.

• To create a more aesthetically pleasing floor design.

• To provide additional insulation for the floor.

When a section of a floor joist is cut for plumbing or a stairwell, how is the cut joist typically supported?

• By adding a longer joist next to it.

• By reinforcing it with metal plates.

• By supporting it with a header and joist hangers.

• By simply leaving the cut section unsupported.

Where can underfloor ventilation be installed?

• Only in the blockwork.

• Only in the rim joist.

• In the blockwork or the rim joist.

• It is not required for underfloor areas.

What method is used to cut "specials" (blocks that are not a normal length)?

• Measure the gap with a tape measure and then cut the block.

• Place the block in the hole, mark it, and then cut it.

• Use a pre-cut standard size block.

• Cut the block to a predetermined length from a blueprint.

Are you enjoying the video lesson?

• Yes

• No

What are two primary reasons for using construction adhesive when installing plywood sheathing?

• To make the floor waterproof and reduce installation time.

• To bond the plywood to the joists and prevent squeaking.

• To increase the insulation value and provide a smoother surface.

• To protect against pests and allow for easier removal later.

Why is an 1/8-inch gap left between plywood sheets during installation?

• To allow for easier alignment of the sheets.

• To provide space for electrical wiring.

• To accommodate plywood expansion in wet weather.

• To reduce the overall weight of the floor.

What tool is used to cut out the marked centers for pipes in the subfloor?

• A circular saw

• A jigsaw

• A reciprocating saw

• A hole saw