Without requiring a permit, 102 inches. As for what it's capable of hauling, it's all a matter of what can be balanced.
A refridgerated truck can haul 42,500-44,500lbs of good depending on how heavy the rig is. The truck can gross 80,000 total.
8'6" max legal / non permit
96 inches.
Most semi trucks are able to do long hauling. You should choose a relatively new truck that fits your budget.
Gross 52,000 lbs
Legally, about 140 - 150% of its tare weight. Most could haul significantly more if need be.
Three or more. I've run units with 21 axles before. A typical line haul truck has five.
ABOUT 23,000 LBS ABOUT 23,000 LBS
Daycab Semi trucks can range in size from 2 tons to 6 tons maximum.
About 8-1/2 for a regular, three axle line haul truck.
Anywhere from 50 to 300, depending on how the buyer had it spec'd out. 240 gallons is pretty common for a line haul OTR truck.
Maximum non permitted width is 102" or 8 1/2 feet.