What is a characteristic of a floating slab?

A floating slab is designed to move independently of the walls and is not anchored to a foundation wall. One key characteristic of floating slabs is that they generally incorporate expansion joints, which allow for movement due to thermal expansion and contraction as well as settling of the ground.

The presence of these expansion joints can also create potential entry points for pests like termites. Termites often take advantage of these joints, as they provide an accessible pathway from the ground into the structure without being immediately visible, which is a concern for maintaining pest control.

The other options do not accurately describe the characteristics of a floating slab. For example, a floating slab is not typically poured as a single unit with the walls, since it operates independently. It is also not poured over a foundation wall and is usually designed to be at or near ground level rather than elevated above it.