Glossary

The legal property right for use of the space above a specified elevated plane; usually includes the right to ground […]

An apparatus for separating ground-up materials pneumatically into various sizes.

A ventilating shaft; a roofless enclosed area within a building or between buildings; may have openings such as windows.

A device for regulating the quantity of air being mixed with gas for combustion.

Absorption by quicklime or cement of moisture and carbon dioxide from the atmosphere, causing the material to change its chemical

A device which eliminates trapped air from a piping system.