Posted by Matt from CT on October 07, 2007 at 15:58:58 from (68.245.125.251):
In Reply to: Why 73,280 lbs? posted by in-too-deep on October 07, 2007 at 14:26:10:
I did some quick digging, and that number seems to have come from the 1956 Federal Highway Act that establised it as the maximum GVW on Interstates (except for a bunch of exceptions...)
It also established 18,000# single axle, 32,000# tandem axle limits.
One hopes that somewhere some engineer did the calculations based on the maximum axle weights, maximum allowed trailer length, maximum speed limits to come up with that number.
Of course, it was Congress that had to pass the law and we can only imagine the back scratching going on.
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