Local propane distributor Superior Propane has a fleet of very heavy looking Kenworths. Most are on high chassis T470 models, complete with skid plates under the rads, and other very heavy duty features. Just why this should be so is a bit of a mystery, except that it seems some propane customers are are on back roads or construction sites and very hard to reach with normal class 7 trucks.
No doubt these trucks are rugged, and they should stand up well. When they finish their propane careers, they would certainly have value as dump trucks or other construction vehicles.
This particular KW has a particularly huge front bumper.
Picture taken in Burnside August 8, at a Caterpillar service centre.