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Depot: 45 Alvar St, New Orleans, LA 70126

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Container Size Guide

Nominal sizes, how standard and high cube differ, and how to pick a length. Exact internal dimensions, door openings and weights are listed on each unit.

Sizes side by side

Side-by-side scale drawing: 20ft standard (20ft long, 8ft 6in high), 40ft standard (40ft long, 8ft 6in high) and 40ft high cube (40ft long, 9ft 6in high). All are 8ft wide. 20ft Standard20' L × 8' W × 8' 6" H 40ft Standard40' L × 8' W × 8' 6" H 40ft High Cube40' L × 8' W × 9' 6" H · +1 ft headroom
TypeExternal lengthExternal widthExternal height
10ft10 ft8 ft8 ft 6 in
20ft Standard20 ft8 ft8 ft 6 in
40ft Standard40 ft8 ft8 ft 6 in
40ft High Cube40 ft8 ft9 ft 6 in

Nominal ISO external sizes. Internal dimensions, door openings, tare and payload vary by manufacturer and build year, so we publish them per unit rather than as a single chart. If a dimension is critical, ask us to measure the unit.

Choosing a length

  • 8ft & 10ft — tight yards, tool stores, sites a 20ft cannot reach.
  • 20ft — the default. Fits most driveways and job sites and is the easiest size to deliver.
  • 40ft — double the floor area of a 20ft for much less than double the price. Needs a long, straight approach for delivery.

Standard vs High Cube

A high cube is one foot taller: 9 ft 6 in outside instead of 8 ft 6 in. Footprint is identical. Choose it for tall racking, vehicles and machinery, or any conversion where ceiling height matters after insulation and lining.

Container anatomy

Container anatomy: corner castings, top and bottom side rails, corrugated side panel, cargo doors with locking bars, door gasket, forklift pockets and cross members under the floor. Corner casting (×8) Top side rail Corrugatedside panel Cargo doors+ gasket Locking bars& handles Forklift pockets Bottom rail & floor cross members Corner post

A container carries its load through the corner posts and corner castings; the corrugated panels brace the frame. That is why ground support belongs under the four corners, and why cutting large openings calls for reinforcement.

Door openings

Plan view of a container with both cargo doors open 270 degrees. Each door leaf is about 4 feet wide, so leave at least 4 feet of clear swing in front of the door end, or room along each side to fold the doors back. CONTAINER (plan view) ≈ 4 ft Doors open 90°:keep ≈ 4 ft clearin front Doors folded back 270°: leave room along each side

Standard containers have double doors at one end. The clear opening is smaller than the external size because of the door frame and header — check the “Door opening” row on the listing before planning to drive equipment in. For side loading, look at open side units; for crane loading, open top.

Open side & reefer

Open-side container: bi-fold doors run the full length of one side, so a forklift can load pallets from the side as well as through the end doors. Forklift access along the full side Bi-fold side doors fold back in pairs

Open-side containers add full-length doors on one side, so pallets and long items load by forklift without working from the end.

Reefer airflow, side section: the refrigeration unit at the front blows cold air under the cargo through the T-bar floor; air rises through and around the load and returns along the ceiling to the unit. Keep cargo below the load line and do not block the floor channels. REEFER UNIT CARGO load line Cold supply air travels under the load through the T-bar floor Warm return air flows back along the ceiling

Refrigerated containers circulate air from the unit, under the cargo and back along the ceiling. Keep the floor channels clear and stack below the load line. Power requirements are listed on each reefer unit — confirm your supply before ordering.

Space on site

Allow the container footprint plus room to swing the doors fully open (each leaf is about 4 ft) and to walk around the unit. Delivery needs considerably more room than the container itself — see the delivery & placement guide.