acute arch, lancet arch
A sharply pointed arch whose centers are farther apart than the width of the arch.
A sharply pointed arch whose centers are farther apart than the width of the arch.
1. Strictly, a pedestal at the corners or peak of a roof to support an ornament. 2. More usually, the
A structural system for supporting an acoustical ceiling; may incorporate lighting fixtures and air diffusers.
A device installed in a drainage system into which the discharge of acid is probable; neutralizes the discharge sufficiently to permit
A door, usually small, which is provided through a finished construction, as into a duct, through a ceiling, behind a wall, in