Commercial Casement Window

casement window, earliest form of movable window, wood or metal framed, with hinges or pivots at the upright side of the vertically hung sash, so that it opens outward or inward along its entire length in the manner of a door.A casement window is any window that is attached to its frame by one or more hinges. Specifically, windows attached to the frame on the side (windows hinged at the top are awning windows, but more on that later). Basically they're like doors, only instead of opening with a knob they open with a crank.Sliding windows are used in openings that are wider than they are tall. They open sideways, with one pane sliding over the other. Casement windows, also known as crank windows, are often chosen for tall, narrow window openings. The windows are attached to the side of the window frame and swing outward.