I'll look tonight when Iget home, but there is a formula for the number of square inches of tire on the pavement = amount of weight allowed on that axle.
Haven't seen it used since most states went to enforcing the federal bridge weight limits. 12k on single tire axles, 20k on single dual tire axle, 34k on dual tandem axles (8 tires)
It'll be late, in Amarillo now...
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Serving the oil patch/petro-chemical industry
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