Is it normal for my tray to appear slightly concave or convex?

• A slight visual bow may appear depending on the span, the support on the ground, and the hygrometric variations. Ensure that the furniture is perfectly level; distribute the loads evenly. For longer lengths, check for the presence/adjustment of a central leg or a reinforcement. If the curvature progresses, lighten it, allow the furniture to acclimate, then recheck.