I

A steel beam with a cross section resembling the letter I. It is used for long spans as basement beams or over wide wall openings, such as a double garage door, when wall and roof loads are imposed on the opening.

Any additions to property, which tends to increase its value, such as buildings, streets, sewers, etc.

A lamp in which a filament gives off light when sufficiently heated by an electric current.

It is steel reinforced poured concrete that allows the forms to stay in place and become a functional part of the house. The walls and floors will be concrete.

Any board suitable for insulating purposes.

Materials for obstructing the passage of sound, heat, or cold from one surface to another.

General term for all the finish molding, casing, baseboard, and cornice applied within the building by finish carpenters