Posted by John in La on June 17, 2014 at 17:18:01 from (96.33.136.54):
In Reply to: I gots to know? posted by gwstang on June 17, 2014 at 15:43:55:
A semi is a trailer that carries only a portion of the weight. The connection point is above and in front of the truck (tractor) rear axle so the truck carries a large portion of the weight.
When you add a dolly (steering axle; such as in doubles) to the front of a semi trailer it becomes a full trailer.
With the invention of goose necks and smaller one ton semi trailers "semi" has come to insinuate large commercial units over the years to distinguish between the two.
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