Here is a picture with the cover off. You can now see the top bars, which are the only support point that the bees use to build their natural comb. Each top-bar is 1-3/8 inches wide, except the front and back, which are 1-9/16 inches wide to accomodate a bee space against the front and back walls of the hive. - David Tromp
Here is a picture with the cover off. You can now see the top bars, which are the only support point that the bees use to build their natural comb. Each top-bar is 1-3/8 inches wide, except the front and back, which are 1-9/16 inches wide to accommodate a bee space against the front and back walls of the hive. - David Tromp​