Glossary

An arc is a partial sweep of a circle’s perimeter from it’s center

Arcing is the jumping of current over an air gap caused by poor or damaged electrical connections in a circuit that can become an electrical fire hazard

Argon is a gas filled between glass panes to slow heat transfer through a window

An axis is a fixed reference line often for a measurement

Back rolling is the process of applying a roller over a brushed or sprayed area to add a uniform texture

Backer rod is a foam strip used to fill larger cracks prior to caulking

Floor framing part that holds other end and common joists in place in a floor frame.  Also called Rim Joist

The base plate of a saw is a flat saw surface that makes contact with the material being cut and helps keeps the tool under control

The base section is the fixed ladder section that does not move on an extension ladder. It remains planted to the ground and supports the fly section

A basin is a bowl for washing which is typically attached to a wall and having faucets connected to a water supply and a drain line for removing wastewater