Concrete floors have been used on a large scale in single-family houses. Toronto developer J.D.S. Investments Limited started using a precast hollow-core slab floor system in apartment construction because it was fast and simple to erect, even in freezing weather.
The ground floors of prestressed hollow-core construction were precast in panels 4 feet wide and 8 inches thick. They are designed to carry a live load of 40 pounds per square foot plus finishes and all partitions, including the load bearing partitions which support the second floor. The precast supplier also site-drilled and cut all holes necessary for electrical and mechanical services.
In addition to the additional livable basement space, the hollow-core concrete floor provides fire safety and thermal storage properties.