Re: What is it that is semi about a semi tractor-t

Posted by 30 years on the road on May 22, 2003 at 14:29:08 from (216.52.32.201):

In Reply to: What is it that is semi about a semi tractor-trailer rig? posted by dan on May 20, 2003 at 09:40:01:

A 'straight truck' is all one unit (cab, load
platform & power unit) like a dump truck,
delivery van, etc. An over-the-road 'tractor' pulls
a semi-trailer (no front axle, supported by the
tractors' drive axle or axles) and can pull one
or more behind that trailer if so equipped. The
second and third trailers are, technically,
trailers not semi-trailers as the converter (aka:
dolly) allows the trailer to be have independent
steering and stand-alone capability. A bob-tail
is a tractor running without a trailer and,
therefore, unloaded. A straight truck pulling a
straight-tongue trailer on a pintle-hook is a
b**h and pup ; a straight truck pulling a
semi-trailer on a converter is a cow and calf. A
tractor pulling a semi-trailer with a converter
and another semi-trailer on the hook is called
doubles, joints, wiggle-wagons, etc. Add a
third trailer and you've got triples or trips (aka:
a rubber-tired-railroad!). Roger? :-)

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