floor joists

Horizontal structural members

Floor joists are the horizontal beams that support a floor, running parallel to each other between walls or foundation supports.

They form the structural framework beneath flooring materials, typically spaced sixteen inches apart.

The inspector found rot in several floor joists under the bathroom.

In older homes, floor joists are often solid lumber; newer construction may use engineered wood or steel.

Related

span · plywood · construction · framing · load-bearing · dead load · live load · carpenter · structural · engineered wood · decking · timber · studs · foundation · squeaky · bounce · level · basement

Categories
Opposites
structural orientation

floor joistswall studs

Vertical framing members

columns · posts · ceiling joists · pillars · load-bearing walls

building layer/visibility

floor joistsflooring

Surface underfoot material

hardwood floors · floor covering · subfloor · tile · carpet

structural position

floor joistsceiling joists

Horizontal beams supporting overhead surfaces

rafters · roof trusses

Family

floor, joist, floors, joists, floored, flooring

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G