Maximum Legal Weight Allowed
|WEIGHT FOR AXLE GROUPS OTHER THAN STEER AXLES|
|MAXIMUM WIDE BASE SINGLE TIRE WEIGHT||RTAC**||Class A1||Class B1|
|Maximum per tire||N/A||3,850 kg||3,850 kg|
|Single Axle Maximum||9,100 kg||7,700 kg||7,700 kg|
|TANDEM AXLE UNIT|
|Tandem Axle Maximum||17,000 kg||15,200 kg||13,800 kg|
|TANDEM SEMI-TRAILER AXLE UNIT|
|Axle spread 2.4 m to less than 3.0||21,000 kg||20,000 kg||19,000 kg|
|Axle spread 3.0 m to less than 3.6||23,000 kg*||22,000 kg||19,000 kg|
|Axle spread 3.6 m to 3.7 m||24,000 kg||22,000 kg||19,000 kg|
|TRIDEM DRIVE AXLE UNIT|
|Axle spread 2.4 m to less than 2.8||21,000 kg||20,000 kg||19,000 kg|
|TRIDEM DRIVE AXLE UNIT (ON A VEHICLE WITH A TANDEM STEER AXLE GROUP)|
|Axle spread 2.7 m to less than 3.0||22,000 kg||20,000 kg||19,000 kg|
*A trailer tridem axle group with an axle spread of 3.0 m or more but less than 3.6 m is allowed 24000 kg on routes with a designated maximum GVW of 63500 kg.
**RTAC refers to all commercial vehicles that conform to the national standard designated by the Road Transportation Association of Canada.
RTAC: (Acronym for “Road Transportation Association of Canada, now known as Transportation Association of Canada or “TAC”)
- when used in reference to a highway, RTAC is one of the highway classifications in the national standard – RTAC, A1 and B1
- when used in reference to a commercial vehicle, RTAC is a vehicle that complies with the Heavy Truck Weight and Dimension Limits for Interprovincial Operations in Canada (resulting from the Federal-Provincial-Territorial Memorandum of Understanding on Interprovincial Weights and Dimensions).