Used shipping containers offer significant cost savings compared to new units, but purchasing wisely requires understanding quality standards, recognizing condition indicators, and knowing what to inspect. The container industry uses specific grading systems to classify condition levels, and understanding these grades helps buyers match their needs to appropriate options.
Understanding Container Grades
The industry uses several classification systems. The Common-Working (CW) grade includes containers with visible rust and wear but structurally sound construction suitable for storage. Wind and Water Tight (WWT) certified containers have been inspected to prevent wind and water penetration, making them appropriate for weatherproof protection. As-Is containers are sold without condition guarantees, requiring careful buyer inspection. Refurbished containers have been professionally restored with new floors, resealed seams, and rust treatment.
Door and Seal Inspection
The container's doors are critical components. Inspect door gaskets for tears or deterioration—damaged seals compromise weather protection. Check hinges for rust and proper operation. Test the doors for smooth opening and closing, ensuring locking mechanisms function securely. Pay special attention to corner welds near door hinges, where stress can cause cracks.
Roof and Structural Assessment
Examine the roof for punctures, rust penetration, or failed seams. Look closely at corner posts and roof edges where water intrusion commonly occurs. A compromised roof can lead to interior water damage affecting stored goods. Check the structural integrity of the container's frame, ensuring no dents or deformations exist that could compromise stacking capability.
Floor Evaluation
The container floor is typically marine-grade plywood and is vulnerable to water damage and rot. Walk the entire floor, listening for soft spots indicating water damage beneath. Check the perimeter where the floor meets the side walls—this junction is prone to water infiltration.
Size and Dimensions
The most common sizes are 20ft standard (8'6" height), 40ft standard (8'6" height), 40ft high-cube (9'6" height), and 53ft containers. Determine which size suits your needs: 20ft containers fit tighter spaces and are easier to position, while 40ft and larger options provide significantly more storage capacity. High-cube variants offer additional vertical space for tall items.
Finding Reliable Sellers
Purchase from established container dealers who thoroughly inspect inventory and provide condition documentation. Reputable sellers stand behind their products and offer transparent grading information.
Reach out to HCT Containers for quality used containers with verified condition reports.