Legislation mostly. There are maximum axle weights and maximum vehicle weights. 5 axles total. 2 drive axles with 8 wheels per axle at 20k lbs per axle is 40k lbs, 2 trailer axles with 8 wheels per axle at 20k lbs per axle is another 40k lbs. One steer axle with 2 wheels at 13k lbs. They all add up to 96k lbs, but there's some room there for uneven

It depends on what kind of folding tonneau cover you have. If you have a soft folding tonneau cover or a vinyl style folding cover, then you can drive with it folded up. Most vinyl folding tonneau covers have webbing straps and clips incorporated into them so that when the covers are folded up, you're able to clip them down towards the front of you

A 10' truck is ideal for 1-bedroom apartment moves and typically costs from $20-$30 per day plus $.69-$1.10 per mile. 14' rental truck: A 14' truck is ideal for 1-room residential moves (up to 10,000 pounds) and typically costs from $30-$40 per day plus $.69-$1.10 per mile.