The appropriate thickness for shelving depends heavily on the span length and the weight of the items you intend to store, but standard shelves typically range from 3/4 inch to 1 inch thick. For light duty displays spanning up to 30 inches, a standard 3/4-inch plywood or solid wood board is usually sufficient. However, for heavier loads like dense books or kitchen dishware spanning longer distances, using 1-inch to 1.5-inch thick boards prevents unsightly sagging and ensures long-term structural integrity.
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