I did manage to find the commercial weight regulations for Alberta (
AR 315/2002) and it is similar to the FMCSA regs. It lists max weight per tire, axle, axle group and vehicle among other things.
I was also able to contact a vehicle standards specialist in the Alberta government. According to him, the reason I couldn't find any regs dealing with the weight of private vehicles is because there aren't any. He pointed me to the
Traffic Safety Act in particular Section 66. Basically, anyone operating a vehicle in Alberta must ensure that it is in safe operating condition. That covers mechanical condition and weight among other things. So, it isn't illegal to exceed the manufacturer's GVWR unless a LEO believes that such a load is unsafe.
Bert
