- I-Beam
- Steel beam with a cross-section that resembles a capital I. Used as a main structural support over large openings such as garage doors, or in basements where a long span is needed without the aggravation of numerous pillars.
- Insulation
- Any medium that stops the transfer of heat or cool from one area to another.
- Interior Finish
- Covering used on interior walls or ceilings, stipple or other finish used on ceilings, wallpaper, paneling, and paint.
- Interior Trim
- Any interior woodwork designed to conceal unfinished edges or joins. Woodwork used to decorate around doors and windows, baseboard, moldings etc.
- Joist
- A beam that typically supports a floor. Typically a 2″ x 10″.
- Joist Hangar
- A steel piece that can be nailed to the side of one joist and holds the end of a joist that needs to be secured to it at a 90-degree angle.