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.
For where dry van capacity actually sits on Mexico and Canada lanes, see dry van coverage.
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