Legal vehicle weight
Gross vehicle weight (GVW) for a vehicle or a vehicle combination is determined by an overlapping set of three criteria: tire size, axle weight, and the weight table. The lesser of any one of the criteria will govern the weight of any axle or axle group
Maximum gross weights - Wheelbase and axle factors
No vehicle or combination of vehicles shall operate upon the public highways of this state with a gross load on any single axle in excess of twenty thousand pounds, or upon any group of axles in excess of that set forth in the following table, except that two consecutive sets of tandem axles may carry a gross load of thirty-four thousand pounds each, if the overall distance between the first and last axles of such consecutive sets of tandem axles is thirty-six feet or more.
Vehicle weight table (PDF 23KB)
The legal weight table RCW 46.44.041 according to state law.
Slow down on ice and snow.
It's easier to skid or lose control traveling at higher speeds. Give yourself more time to stop.
Carry chains, practice installing them.
Winter conditions could mean chains are required on your route. Practice putting them on your vehicle ahead of time.
Pack your winter car kit.
Carry extra supplies like warm clothing, ice scraper and brush, jumper cables and other emergency items.