Sub Floor Construction Details

Joists are typically shorter and lay across the beams to give them horizontal support.

Sub floor construction details.

Good subfloor construction depends on material selection and attention to critical details. Although cold formed steel framing for floor systems also is permitted by the irc it is not covered here. During this video we will identify key installation practices th. 69 chapter 4 floor construction woodframe floor systems and concrete slab on grade floors are discussed in this chapter.

If you have a concrete slab floor the slab may be considered the subfloor. Or the subfloor may be made of plywood or other panel products that are laid perpendicular to the joists. Rather the reader is referred to the aisi standard for cold formed steel framing prescriptive method for one and two family dwellings aisi 2001 for guidance. Beams are thicker and longer and are laid vertically.

The subfloor is the foundation beneath finish flooring materials. Beam and joist arrangements can form a supporting frame for a floor. On wood frame floors the subflooring provides a continuous structural surface over the floor joists. In basements and in homes with slab on grade foundations the subfloor may simply be a concrete slab.

Subflooring provides a base for finish flooring and also serves as a platform during construction.