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20GP,40HQ
Jan 11, 2018

Containerization is a system of intermodal freight transport using intermodal containers (also called shipping containers and ISO containers).The containers have standardized dimensions. They can be loaded and unloaded, stacked, transported efficiently over long distances, and transferred from one mode of transport to another—container shipsrail transport flatcars, and semi-trailer trucks—without being opened. The handling system is completely mechanized so that all handling is done with cranes and special forklift trucks. All containers are numbered and tracked using computerized systems.

Containers can be made of weathering steel to minimize maintenance needs.

There are five common standard lengths:

  • 20 ft (6.10 m)

  • 40 ft (12.19 m)

  • 45 ft (13.72 m)

  • 48 ft (14.63 m)

  • 53 ft (16.15 m)

US domestic standard containers are generally 48 ft (14.63 m) and 53 ft (16.15 m) (rail and truck). Container capacity is often expressed in twenty-foot equivalent units (TEU, or sometimes teu). An equivalent unit is a measure of containerized cargo capacity equal to one standard 20 ft (6.10 m) (length) × 8 ft (2.44 m) (width) container. As this is an approximate measure, the height of the box is not considered. For instance, the 9 ft 6 in (2.90 m) high cube and the 4 ft 3 in (1.30 m) half height 20 ft (6.10 m) containers are also called one TEU. 48' containers have been phased out over the last ten years in favor of 53' containers.

The maximum gross mass for a 20 ft (6.10 m) dry cargo container is 24,000 kg (53,000 lb), and for a 40 ft (12.19 m) container (including the 9 ft 6 in or 2.90 m high cube) it is 30,480 kg (67,200 lb). Allowing for the tare mass of the container, the maximum payload mass is therefore reduced to approximately 22,000 kg (49,000 lb) for 20 ft (6.10 m), and 27,000 kg (60,000 lb) for 40 ft (12.19 m) containers.

The original choice of 8-foot (2.44 m) height for ISO containers was made in part to suit a large proportion of railway tunnels, though some had to be modified. The current standard is eight feet six inches (2.59 m) high. With the arrival of even taller hi-cube containers at nine feet six inches (2.90 m) and double stacking rail cars, further enlargement of the rail loading gauge is proving necessary.


Land Joint usually use 20GP and 40HQ for curtain pole loading.Their inside size as below:

20GP approx.: 580cm L * 230cm W * 230cm H

40HQ approx.: 1200cm L *230cm W * 260cm H