Why Some Window Bars Have a “Potbelly” And What Those Curves Are Really For…

Have you ever walked past an older building and noticed that some of the window bars seem to bulge outward in the middle?

At first, the curved section might look like nothing more than an ornamental detail. Maybe you assumed it was simply part of an old-fashioned design, added to make plain metal bars look more elegant.

But that little outward curve can have a surprisingly practical purpose.