Hi All - I'm making a small shelving unit and i prefer to use 4/4 boards instead of plywood. The shelves will be 16" wide walnut which according to my research could mean 1/8-1/4" of movement in my area. My design is similar to the picture below where i'll use 4/4 boards with a front and side face frame if you will to give it some more heft of a look. If i only had the front runners (frame?) then i think i'd be ok with expansion since all 4 of the shelves would move together with the seasons.
I'm just not sure what to do with the side runners - do i have to do some sort of breadboard approach here for the side? Thoughts from others who have done this before?
stero unit.jpg