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Arched windows – in this way, in simple terms, we’re talking about windows in which the upper part has a different shape than the standard rectangle. Each window consists of a frame and a sash, and these elements determine the division of arched windows. Arched windows: A. in an arched frame; B. in a rectangular frame; C. in a rectangular frame with an arched filling, the so-called false arch windows.
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In this section, we will discuss arched windows in a rectangular frame with an arched filling, that is, windows with a false arch.
C. Arched windows in rectangular frame with arched fillings are so-called false arc. The construction of the window (frame and sash) is identical to that of rectangular windows. In principle, it can be said that these are standard windows that imitate an arch thanks to special fillings fixed on the window.
To make the effect of an arc window as close as possible to a typical arc window, from the outside the arc filling is not only on the sash but also on the window frame.
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Filling should be matched to the chosen arch shape:
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The arch is determined on the basis of the following elements: span – the distance of the points at the point of support of the arch, arrow – the biggest distance betweem the straight line connecting the points of support and the highest point of the arch measured vertically (h).
Depending on how the shape of the arc is determined, we use a division into 6 types:
1. Segmental arch: one radius (r) passing through the points of support of the arc and a certain height (h), 2. Basket arch: plotted with three arcs (r), 3. Semicircular arc: one radius (r), which is the height of the arc, 4. Arc + straight segment: plotted with two arcs of radius (r) connected by straight segments that meet at a point that is the height of the arch, 5. Gothic arc: plotted with two arches that pass through the points of support of the arch and join at a point that is the height of the arch, 6. Non-standard arcs: can take different shapes while maintaining symmetry.
Windows with false arch – is an economical variant of the window, which captures the character of a real arch window. As for the arched windows in a rectangular frame (see part 2), they are also suitable for installation in an elevation with an arched window opening. Making the window is less labor-intensive than a typical arched-frame window, which ultimately translates into its price.
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