I am making drawers that are about 20 inches wide. (left to right as seen from the front) They are 4 inches in height and about 15 inches deep. I am using solid wood for the bottoms, so they will be 15 x 20 with the grain running the longest measurement. At this width, would a central muntin going from front to back be needed to support a two part bottom be a good idea? Or should I just make the bottom one piece and keep it about 3/8 on an inch thick?
In other words, at what width (left to right) of a drawer would you consider putting in a central muntin to support the bottom?