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A window or an area of a window which does not open; glazed directly in a fixed frame that does

In a structural framework, a joint that restrains a member from turning.

Said of a column or beam that is rigidly restrained at the end supports so as to prevent it from

A column whose fixed ends prevent it from rotating.

A structural beam whose ends are fixed.

In an air-conditioning system, a grille most commonly used for return and exhaust air openings; the position of the bars