definition
strict definition
hopper
An openable window hinged along its bottom edge, allowing the rest of the pane to swing about that edge.
A hopper window is an openable window which is hinged at the bottom, enabling it to swing open like a drawbridge being lowered.
The lower edge supplies the hinge axis. An awning window has the corresponding hinge at the top.
A tilt window is hinged in the middle. The location of the hinge distinguishes it from the bottom-hinged hopper.
Related definitions
-
awning
An openable window hinged at the top of its frame, with the pane swinging about that upper edge. -
casement
A window that swings from a side hinge, including diagonal sides closer to vertical than horizontal. -
continuous glazing
Fixed windows arranged side by side in long rows or on a continuous surface. -
glass brick
A window opening filled with glass masonry units mortared together, usually admitting light while obscuring clear views. -
louvered
A window which is divided into multiple panes which swing open on parallel hinges. -
multi-lit
A window divided into a grid or another arrangement of smaller panes, most of which cannot be opened. -
no windows
A structure without facade windows for light or views, while allowing glass doorways, skylights, and other non-window openings. -
picture
A fixed window filling its wall opening or sharing it with a few other panes, excluding long rows and many small divisions. -
sash
A window that opens by sliding vertically, usually with two panes that overlap when opened. -
sliding
A window that opens by moving sideways along a groove or track, including tracks with a curved starting section. -
stained-glass
A window containing colored glass, often in small panels, excluding clear or uniformly very lightly tinted multi-lit glazing. -
tilt
An openable window hinged in the middle, rotating about either a horizontal or a vertical central axis. -
tilt-turn
An openable window combining opening types so the user can choose between multiple axes of movement. -
unglazed window openings
Permanently open window apertures admitting light and views through a facade, with screens or no barrier.