In wood-frame construction, which member primarily supports a floor?

In wood-frame construction, which member primarily supports a floor?

• A. Joists
• B. Studs
• C. Rafters
• D. Piers

Answer: (A)

Floor loads in wood-frame construction are carried by the floor joists. These horizontal framing members span between bearing walls or beams and support the subfloor (and any finish flooring) above. They are designed to transfer the weight of people, furniture, and finishes down to the supporting walls and ultimately the foundation. The other options have different roles: studs are vertical members forming walls, rafters are inclined members that support the roof, and piers are foundation supports. So the floor relies on the joists as the primary supporting members.

Floor loads in wood-frame construction are carried by the floor joists. These horizontal framing members span between bearing walls or beams and support the subfloor (and any finish flooring) above. They are designed to transfer the weight of people, furniture, and finishes down to the supporting walls and ultimately the foundation. The other options have different roles: studs are vertical members forming walls, rafters are inclined members that support the roof, and piers are foundation supports. So the floor relies on the joists as the primary supporting members.