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A container chassis, also called intermodal chassis or skeletal trailer, is a type of semi-trailer designed to securely carry an intermodal container. Chassis are used by truckers to deliver containers between ports , railyards, container depots, and shipper facilities, [ 1 ] : 2–3 and are thus a key part of the intermodal supply chain .
It has a drawbridge forming a pocket in the low position (hence its name) allowing the carrier train (2 or 3 axles) of the semi-trailer to be placed and thus to respect the height of the loading gauge ( 4.2 m or 13 ft 9 + 3 ⁄ 8 in above top of rail for the loading gauge of the UIC). These are special open wagons. The axle models are UIC K ...
Econo Stack (a brand name of Gunderson) well cars are a variation of conventional well cars which feature a bulkhead at each end; their main purpose is to give the double-stacked containers more support. A disadvantage is they do not allow 53-foot containers to be stacked on top; however, 45-foot containers still fit and can be stacked on top.
By the end of 2013, high-cube 40 ft containers represented almost 50% of the world's maritime container fleet, according to Drewry's Container Census report. [ 47 ] About 90% of the world's containers are either nominal 20-foot (6.1 m) or 40-foot (12.2 m) long, [ 6 ] [ 48 ] although the United States and Canada also use longer units of 45 ft ...
Reach stackers are fitted with lifting arms as well as spreader beams for lifting containers to truck or rail and can stack containers on top of each other. [5] Sidelifters are a road-going truck or semi-trailer with cranes fitted at each end to hoist and transport containers in small yards or over longer distances.
Container ships only take 40's, 20's and also 45's above deck. 90% of the containers that these ships carry are 40-footers and 90% of the world's freight moves on container ships; so 81% of the world's freight moves by 40-foot containers. Most of these 40-foot containers are owned by non-U.S. companies like Maersk, MSC, and CMA CGM.
Therefore, the powered vehicles have their frame at 1,103mm above the top of the rails at the ends, [2] and at 1,000mm in the central section of the vehicle. The trailers have their frame at 1,000mm above the top of rail over their entire length. [1] The electric vehicles have crew and equipment rooms above the bogies at both ends. [1]
When lifting containers in confined locations or from rail wagons or trailer decks, tilting and extending legs provide additional capability. Chains, which are attached from the top of the cranes to the corner castings at the base of the container(s) during lifting operations.