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
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.
In the US, unless otherwise permitted, 80,000 lbs.
Daycab Semi trucks can range in size from 2 tons to 6 tons maximum.