The weight capacity of shelving varies dramatically depending on the materials used, the thickness of the board, the span length between supports, and how securely the mounting hardware is anchored into the wall. A standard decorative floating shelf supported by concealed brackets might hold between 15 to 30 pounds, whereas heavy-duty wall-mounted metal standards with solid wood planks can easily support 100 to 200 pounds or more. Meanwhile, industrial commercial steel wire shelving units or heavy-duty garage racks built from 2x4 lumber can comfortably hold anywhere from 300 to over 1,000 pounds per shelf.
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