Uncategorized Uncategorized

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.

Read More
Uncategorized Uncategorized

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.

Read More
Uncategorized Uncategorized

Deflection

Displacement that occurs when a load is applied to a member or assembly. The dead load of the member or assembly itself causes some deflection as may occur in roofs or floors at mid-span. Under applied wind loads maximum deflection occurs at mid-height in partitions and walls.

Read More
Uncategorized Uncategorized

Deformation

Change in shape of a body brought about by the application of a force internal or external. Internal forces may result from temperature, humidity or chemical changes. External forces from applied loads can also cause deformation.

Read More