A dry van (caja seca) is the enclosed box trailer that moves most general freight, with the 53-foot van as the North American workhorse. It is the default equipment of cross-border truckload, and the '53-foot caja seca' is the standard unit of Mexico–U.S. lanes.
A dry van, caja seca in Mexico, is the fully enclosed box trailer: no temperature control, no open deck, just protected cubic space for palletized and packaged freight. The 53-foot van is the standard across the U.S., Canada, and the main Mexican cross-border corridors, and when a Mexican dispatcher says 'caja de 53,' this is the equipment in question. Shorter boxes (48-foot, 40-foot) still circulate, particularly in domestic Mexican service and older fleets.
Dry van is the reference equipment of the market: the most common posting, the deepest carrier pool, and the baseline against which other equipment prices at a premium.
Cross-border, the caja seca is where the through-trailer model shines: a 53-foot van loaded in the Bajío can run door to door into the U.S. with only tractor swaps at the border. The practical checks that matter on these lanes: confirm the actual trailer length and door type against the shipper's dock and load plan, verify condition standards (food-adjacent and retail freight will reject a battered box), and remember that the trailer's owner and its return economics shape the rate, since someone's van is spending days abroad. Weight discipline differs by country too, so a load that grosses legal in Mexico under Mexican weight norms is not automatically legal on U.S. axles. When in doubt, scale it.
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