Used Shipping Container Inspection Checklist (20 Points)

A good used shipping container inspection takes about twenty minutes and covers eight zones: walls, roof, corner castings, doors, gaskets, floor, interior air, and paperwork. The rule of thumb is simple — surface rust and dents are normal and fine, while holes, floor rot, and doors that fight you are not. Inspect in person whenever possible, or demand dated photos of every zone before money moves.

Work the outside first

Checks 1–4 are structural. Walk all four walls (1) looking for dents that crease a corrugation sharply rather than just denting it. Press any deep rust scab with a key (2) — if it flakes through, that's a hole in waiting. Sight down the roof from a ladder (3); shallow dents that shed water are fine, but pooled water and patch plates are not. The corner castings (4) carry every lifting and stacking load, so cracks or torn welds there are disqualifying on the spot.

Doors, hinges, and seals

Checks 5–9 live at the door end. Open and close both doors yourself (5) — one person, no pry bar, or walk away. Inspect the hinges for seized pins (6) and the rubber gaskets for brittleness or missing sections (7), because dead gaskets mean a leaky box no matter how good the steel is. Work every lockrod and cam (8) through a full turn, and check that the doors sit flush and square in the frame (9) — racked doors often mean a twisted frame.

Inside with the doors shut

Checks 10–14 happen in the dark. Shut yourself inside for the light test (10): any pinhole of daylight is a hole. Walk the full floor (11) feeling for soft spots or delamination in the plywood, then look for chemical stains (12) and take a deliberate sniff (13) — pesticide or solvent odors can be permanent. If the container is on blocks, check the steel cross members underneath (14) for rust-through.

Paperwork and the last details

Checks 15–20 close it out. Find the CSC plate on the left door (15) and the data plate's year of manufacture (16), then ask how the seller grades the unit (17) — our grading guide decodes cargo-worthy versus wind-and-water-tight. Confirm the lashing rings are intact (18), glance at the underside rails (19), and measure the door opening (20) against whatever you plan to load.

Check	What good looks like	Red flag
Floor	Solid marine plywood, flat and dry	Soft spots, rot, chemical staining
Doors	Open with one hand, close flush	Pry bar needed, won't seal
Gaskets	Pliable rubber, full contact	Cracked, brittle, or missing runs
Roof	Dry, dents shed water	Pooled water or patch plates
Corner castings	Clean, crack-free steel	Cracks or torn welds
Light test	Total darkness inside	Any daylight at all
Odor	Neutral or faint wood smell	Chemical or heavy mildew smell

If a unit fails more than a couple of these, a better used container — or a new one-trip box — is usually the smarter buy than a repair project.

The short version

Twenty checks across eight zones separate a solid used container from a money pit: the floor, doors, gaskets, and light test matter most, and cracked corner castings or chemical odors end the conversation. Cosmetic rust and dents are expected; holes and rot are not. Every container we sell is verified before it ships. Get a free guaranteed-lowest-price quote — buy, rent, or rent-to-own — with delivery in 3–7 business days.