40ft Standard Storage Container – Used ISO Steel Box

Is a 40ft Standard Shipping Container the Right Size for You?

Buying a 40ft standard shipping container is usually a question of volume per dollar. You get close to double the floor area of a 20-footer for well under double the money, which is why contractors, farms, and warehouses gravitate to this size once they know the delivery can physically reach the spot. If your access is tight or your load is small, the 20-foot version is the smarter buy; if not, the 40 wins on cost per cubic foot every time.

This unit is used stock, sold on the strength of its structure rather than its paintwork. Years of freight service leave dents, scuffs, and surface rust on weathering steel, none of which stop a container from keeping tools dry and locked for another couple of decades on a hardstanding.

Specifications at a Glance

• External dimensions: 40' × 8' × 8'6" high
• Internal dimensions: approximately 39'5" × 7'8" × 7'10"
• Door opening: roughly 7'8" wide × 7'6" high
• Internal volume: around 2,390 cubic feet (about 68 cubic meters)
• Tare weight: approximately 8,200 lb
• Floor area: roughly 300 square feet of usable deck
• Condition: used, with cosmetic wear consistent with freight service
• Delivery: flat $500 nationwide, with tax included in the listed price

Everyday Jobs for a Used 40ft Storage Container

Three hundred square feet of dry, lockable floor covers a lot of ground. Most buyers use it to empty something else — a rented unit, a cluttered barn, a shop floor that has stopped being a shop floor.

• Contractor storage for materials, formwork, and site equipment
• Farm and ranch use for implements, fencing, and bulk supplies
• Retail and e-commerce inventory overflow behind the premises
• Long-term household storage during a build, move, or renovation
• Archive and records storage kept on your own property rather than rented space
• Base shell for a workshop, garage, or grow space conversion

What to Check Before the Truck Arrives

Walk the route first. A 40-foot container on a tilt-bed needs the container length plus roughly 40 feet of straight run to slide off, so plan on about 80 feet of firm, level ground and 15 feet of overhead clearance. Gravel or compacted hardcore works; saturated lawn does not. Put timber or concrete blocks under the corner castings so the frame stays square, and orient the doors where you will actually use them, because turning a 40-footer afterwards is a crane job. Prefer certified steel for shipping or a slightly better cosmetic grade? Compare the cargo-worthy 40ft standard and the wind and watertight 40-footer. You can also review the full used shipping container inventory, see other lengths in the 40ft category, or read our buying guide on grades and pricing.

Frequently Asked Questions

What is the difference between used and cargo-worthy grades?

Both describe secondhand containers, but cargo-worthy has been surveyed and certified fit for ocean freight. A used or storage-grade unit is sold in its present condition for static use. If your container is never going on a ship, the used grade usually gives you the same practical performance at a lower price.

Do I need a foundation for a 40ft container?

A poured slab is nice but rarely necessary. What matters is that the four corner castings sit level on something solid, such as concrete blocks, railroad ties, or paving slabs on compacted ground. Level corners keep the frame square, which is what keeps the doors closing properly through wet and freezing weather.

Can two 40ft containers be stacked?

Structurally, ISO containers are designed to stack many high when loaded and locked at the corners. In practice, stacking on private property means level ground, twist locks between units, and often a permit or engineer's sign-off. Talk to your local building department before planning a two-story arrangement, and never stack on soft or sloping ground.