The doors on a standard container open to roughly 7 feet 8 inches wide, not the full 8 foot exterior width. That extra few inches goes to the steel frame and door hinges. The exact figure is stencilled on your unit's own door beside the CSC plate, since it varies slightly box to box. Measure that, not the outside, before you plan what goes through.
The number people usually reach for is 8 feet, because that is the container's full exterior width. It is the wrong number to plan around. The doors themselves open to something narrower, because the steel door frame and the hinges take up real space on both sides.
That few-inch difference does not matter if you are storing boxes and furniture. It matters a great deal if you are planning to drive a vehicle through the doors, roll in a wide piece of equipment, or build shelving that has to clear the opening on its way in.
On a standard container, the door opening runs roughly 7 feet 8 inches wide, give or take an inch depending on the maker and the year, and it is the same figure on a 20 ft and a 40 ft since both use the same door-end construction. That is the clear width between the door frames once both doors are swung fully open.
Because these are used, real-world containers and not a catalog drawing, the precise door width can vary a little unit to unit. Every container carries a CSC plate near the door, and the exact stencilled dimensions for that specific box sit right beside it. If you are cutting it close, that is the number to trust over any published average, including ours.
Anything you plan to drive or roll through the doors needs to clear roughly 7 feet 8 inches, mirrors and all. That covers most cars, but it is worth checking against a wide truck or an oddly shaped piece of equipment before it shows up at your door.
If you are building something inside the container, like shelving, a workbench, or a partition wall, plan its final width around the door opening, not the outer shell. Something built to 8 feet will not come back out the way it went in.
Give us the width of what you are loading and we will confirm it against the box before delivery day.
Same-day reply. We'll send a real number, a real delivery window, and any photos we need to confirm fit.
You'll hear back from us today (or first thing tomorrow if it's late). For anything urgent, call (276) 237-6144.