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Curing

Protecting concrete after placing so that proper hydration occurs.

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Cut-in brace

Nominal 2-inch-thick members, usually 2 by 4's, cut in between each stud diagonally.

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Cure

To chemically cross-link polymer chains by heating and/or adding a chemical agent.

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Curing Agent

Part of a two-part compound that, when added to the second part, sets up the curing action Also referred to as the catalyst.

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Cycle (Acoustic)

One full repetition of a motion sequence during periodic vibration. Movement from zero to +1 back to zero to -1 back to zero. Frequency of vibration is expressed in Hertz (cycles per second -- see Frequency).

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Current, Electric

The flow of electrons along a conductor.

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Dado

A groove cut into a board or panel intended to receive the edge of a connecting board or panel.

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Curtain Wall

Exterior wall of a building that is supported by the structure and carries no part of the vertical load except its own. Curtain walls must be designed to withstand wind loads and transfer them to the structure.

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Cut and Fill

In grading, earth that is removed (cut) or added (fill).

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Dam proofing

The black, tar like waterproofing material applied to the exterior of a foundation wall.

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De-humidistat

A control mechanism used to operate a mechanical ventilation system based upon the relative humidity in the home.

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Dead light

The fixed, non-operable window section of a window unit.

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Daylight

The end of a pipe (the terminal end) that is not attached to anything.

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Dead Load

Load on a building element contributed by the weight of the building materials.

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Deciduous

Describing trees that shed their leaves annually, as opposed to evergreen.

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Damper

A metal "door" placed within the fireplace chimney. Normally closed when the fireplace is not in use. A movable vane used to vary the volume of air passing through a duct, inlet, or outlet.

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Darby

A tool used to level concrete in a form after it has been screeded.

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Damping Capacity

The ability of a material to absorb vibrational energy.

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Decibel (dB)

A unit for measuring sound energy or power. Adopted for convenience in representing vastly different sound pressures.

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Dead bolt

An exterior security lock installed on exterior entry doors that can be activated only with a key or thumb-turn. Unlike a latch, which has a beveled tongue, dead bolts have square ends.