Custom heavy duty shipping cartons are designed for transporting large, bulky, or high-weight products that require maximum strength and stability. These cartons are built to withstand rough handling, stacking pressure, and long-distance transit while keeping the contents secure. They can be customized in size, wall thickness, and structural reinforcements to meet demanding shipping requirements. Features such as reinforced corners, stronger board grades, and secure closures improve overall durability. During carton planning and testing, The Boxes Co. focuses on load capacity and structural integrity so heavy products remain protected from dispatch to final delivery.