Sash

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sash

[sash]
(building construction)
A frame for window glass.

Sash

Any framework of a window; may be movable or fixed, may slide in a vertical plane, or may be pivoted.

sash, window sash

Any framework of a window; may be movable or fixed; may slide in a vertical plane (as in a double-hung window) or may be pivoted (as in a casement window); a pivoted sash also is called a ventilator, 2.
References in periodicals archive ?
Since 1994, Aneeta Windows has specialised in the manufacturing of sashless windows, an innovative system that features two moving panes of counterbalanced glass, without the bulk of a timber or aluminum sash frame surrounding the glass.