Concave square tube storage shelf

A concave square tube storage shelf, comprising

• a plurality of post columns, each comprising:
• a concave square tube, wherein the concave square tube comprises a first plate, a second plate, a third plate, and a concave plate, the first plate and the second plate are parallel and opposing to each other, the third plate is connected to both the first plate and the second plate, the concave plate is connected to both the first plate and the corresponding second plate;
• a plurality of convex-type fastened components, wherein the convex-type fastened components are respectively assembled on the concave plate at intervals, and each of the convex-type fastened components comprises a fastener body, a convex block, a first assembly notch, and a second assembly notch, the convex block is connected to the fastener body, the convex block is positioned between the first assembly notch and the second assembly notch;
• a plurality of storage layers, each comprising a shelf and a plurality of fasteners, wherein each fastener is engaged to one of the first assembly notches or one of the second assembly notches for securing the storage layers between the post columns;
• and
• a plurality of laminates, each disposed on one of the storage layers;
• wherein each of the concave plates comprises a concave portion, a first plate portion connecting to the first plate, and a second plate portion connecting to the second plate, the concave portion is connected to both the first plate portion and the second plate portion;
• wherein a first block of the fastener body is connected to the first plate portion and a second block of the fastener body is connected to the second plate portion;
• and
• wherein each of the convex-type fastened components is separated from the concave portion of the concave plate by a distance, and each of the convex-type fastened components is inclined outwardly at an inclination angle relative to the concave square tube.

A concave square tube storage shelf, comprising

• a plurality of post columns, each comprising:
• a concave square tube, wherein the concave square tube comprises a first plate, a second plate, a third plate, and a concave plate, the first plate and the second plate are parallel and opposing to each other, the third plate is connected to both the first plate and the second plate, the concave plate is connected to both the first plate and the corresponding second plate;
• a plurality of convex-type fastened components, wherein the convex-type fastened components are respectively assembled on the concave plate at intervals, and each of the convex-type fastened components comprises a fastener body, a convex block, a first assembly notch, and a second assembly notch, the convex block is connected to the fastener body, the convex block is positioned between the first assembly notch and the second assembly notch;
• a plurality of storage layers, each comprising a shelf, two Z-shaped fasteners, two L-shaped fasteners, two Z-shaped assembly buckle components, and two L-shaped assembly buckle components, wherein each of the two Z-shaped fasteners and the two L-shaped fasteners is engaged to one of the first assembly notches or one of the second assembly notches for securing the storage layers between the post columns;
• and
• a plurality of laminates, each disposed on one of the storage layers.