Window Terms Glossary

Operable window: Window which can be opened for ventilation.

Operator: A metal arm and gear attached to the frame of a window and connection with a sash which allows easy operation.

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Windows:

Outer Frame Member: the exterior protruding portion of a window frame that has no exterior casing

Outside Casing: That portion of the window frame which is exposed to the outdoors.

Obscure Glass: Glass that has been made translucent instead of transparent. Often used in bathrooms and decoration.

Oriel Window: An oriel window projects from the wall and does not extend to the ground.

Outside Glazing: Glazing installed from the outside.

Operating Panel: two door or two panel swing or sliding door, the panel that opens.