Lowering basement floors - bench footing

Structure · Problems · printed page 37 (PDF page 38)

Book index entries

Basement – Floors Lowered with Bench Footings Bench Footings Lowered Basement Floors – Bench Footings Footings – and Foundations Foundation – and Footing

Text in the illustration

wall framing
floor framing
topsoil
foundation wall
backfill
original footing
original floor level
original drainage tile
new concrete bench footing
45°
new concrete floor slab
gravel
new interior drainage tile sometimes installed
cross section

Generated explanation

The cross section shows a basement floor lowered below the original foundation footing using a new concrete bench footing along the interior perimeter. The foundation wall and original footing remain in place, while the bench projects inward and extends down to the lowered floor level. A 45° angle is marked beside the sloping underside of the bench footing. The new concrete floor slab rests over gravel, with an optional interior drainage tile shown beneath its perimeter. Exterior backfill, topsoil, the original drainage tile, and wood wall and floor framing provide context for the assembly.

Components

foundation wall original footing concrete bench footing concrete floor slab original drainage tile interior drainage tile wall framing floor framing gravel base backfill topsoil

Materials

concrete masonry wood gravel soil