Heavy-duty shipping boxes are double-wall or triple-wall corrugated cartons rated at 275# burst strength or higher - built for products that exceed the safe capacity of standard 32 ECT single-wall boxes. Use double-wall for items 40–100+ lbs, rough freight handling, multi-transit shipments, and anything that will be stacked under other packages in a warehouse or truck. Triple-wall replaces wooden crates for loads exceeding 200 lbs. StarBoxes 275lb double-wall heavy-duty boxes are available in cube sizes from 8"×8"×8" up to 24"×24"×24".




