Permissible weights
LATEST NOTICES FROM MTI PERMITS SERVICES
2022 Spring Road Restrictions (SRR)
the 2022 Spring Road Restrictions (SRR) will not start before Tuesday, April 5 in Climate Zone 3 (Thompson and northern areas). Attached please find the SRR Orders (English and French) with this latest update.
SRR are effect starting on Saturday, March 19 in Climate Zone 1A (Southern Manitoba); and Tuesday, March 22 in Climate Zones 1B (Swan River area) and 2 (The Pas area).
2021-2022 Winter Seasonal Weights (WSW) – Order No. 10
Please be advised that 2021-2022 Highway Winter Seasonal Weights (WSW) will end at midnight on Friday, March 18, 2022 in Climate Zone 2 (The Pas area) and Climate Zone 3 (Thompson area).
WSW will end on Tuesday, March 15, 2022 in Climate Zone 1A (Southern Manitoba) and Climate Zone 1B (Swan River area) as notified earlier.
REDUCIBLE LOADS: LEGAL/NORMAL AXLE WEIGHTS (M.R. 575/88)
Weights listed are maximums. Weight on steer axles are calculated at 10 kg/mm width of tire. All other axles are calculated at 9 kg/mm width tire.
Example: Truck tractor with 280mm tires for Normal and Winter Seasonal: 280 x 2 x 10 = 5600 kg. This would be the legal maximum for this tire size.
| Axle Group | Normal Period Weight | Winter Seasonal Weights | ||||
| Steering Axles | RTAC | A1 | B1 | RTAC | A1 | B1 |
| Single Steer – Truck Tractor | 6,000 kg | 6,000 kg | 6,000 kg | 6,000 kg | 6,000 kg | 6,000 kg |
| Single Steer – Truck Tractor Tridem drive axles (305 mm tire or less) | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 |
| Single Steer – Truck Tractor Tridem drive axles (tire greater than 305 mm) | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 |
| Single Steer – Straight Truck (305 mm tire or less) | 6,100 | 6,100 | 6,100 | 6,100 | 6100 | 6,100 |
| Single Steer – Straight Truck (tire greater than 305 mm) | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 | 7,300 |
| Tandem Steer – Straight Truck | 13,600 | 13,600 | 11,000 | 13600 | 13,600 | 11,000 |
| Single Axle | 9,100 | 9,100 | 8,200 | 10,010 | 10,010 | 9,020 |
| Tandem Axle (8 Wheel) | 17,000 | 16,000 | 14,500 | 17,600 | 17,600 | 15,950 |
| Tridem Drive Axles – Single Steer | ||||||
| 2.4 m to less than 2.7 m | 21,000 | 21,000 | 20,000 | 21,000 | 21,000 | 20,000 |
| 2.7 m up to 2.8m | 22,000 | 21,000 | 20,000 | 22,000 | 21,000 | 20,000 |
| Tridem Drive Axles – Tandem Steer | ||||||
| 2.4 m to less than 2.7 m (Wheelbase minimum of 7.7 m) | 21,000 | 21,000 | 20,000 | 21,000 | 21,000 | 20,000 |
| 2.7 m up to less than 3.0 m (Wheelbase minimum of 7.8 m) | 22,000 | 21,000 | 20,000 | 22,000 | 21,000 | 20,000 |
| 3.0 m up to 3.1 m (Wheelbase minimum of 7.9 m) | 22,000 | 21,000 | 20,000 | 22,000 | 21,000 | 20,000 |
| Tridem Axles | ||||||
| 2.4 m to less than 3.0 m | 21,000 | 21,000 | 20,000 | 21,000 | 21,000 | 20,000 |
| 3.0 m to less than 3.6 m1 | 23,000 | 23,000 | 20,000 | 23,000 | 23,000 | 20,000 |
| 3.6 m to less than 3.7 m | 24,000 | 23,000 | 20,000 | 24,000 | 23,000 | 20,000 |
| Axle Group | Spring Restrictions Level 1 90% of Normal | Spring Restrictions Level 2 65% of Normal | ||||
| Steering Axles | RTAC | A1 | B1 | RTAC | A1 | B1 |
| Single Steer – Truck Tractor | 5,500 kg | 5,500 kg | 5,500 kg | 6.5 kg/mm width of tire to maximum of 4,745 kg Example: 280 mm tire 280 x 2 x 6.5 = 3,640 kg | ||
| Single Steer – Truck Tractor Tridem drive axles (305 mm tire or less) | 10 kg/mm width of tire to a maximum of 5,500 kg | |||||
| Single Steer – Truck Tractor Tridem drive axles (tire greater than 305 mm) | 9 kg/mm width of tire to a maximum of 6,570 kg | |||||
| Single Steer – Straight Truck (305 mm tire or less) | 10 kg/mm width of tire to a maximum of 5,500 kg | |||||
| Single Steer – Straight Truck (tire greater than 305 mm) | 9 kg/mm width of tire to a maximum of 6570 kg | |||||
| Tandem Steer – Straight Truck | 12,240 | 12,240 | 9,900 | 8,840 | 8,840 | 7,150 |
| Single Axle | 8,190 | 8,190 | 7,380 | 5,915 | 5,915 | 5,330 |
| Tandem Axle (8 Wheel) | 15,300 | 14,400 | 13,050 | 11,050 | 10,400 | 9,425 |
| Tridem Drive Axles – Single Steer | ||||||
| 2.4 m to less than 2.7 m | 12,285 | 11,700 | – | 8,873 | 8,450 | – |
| 2.7 m up to 2.8m | 12,285 | 11,700 | – | 8,873 | 8,450 | – |
| Tridem Drive Axles – Tandem Steer | ||||||
| 2.4 m to less than 2.7 m (Wheelbase minimum of 7.7 m) | 12,285 | 16,200 | – | 8,873 | 11,700 | – |
| 2.7 m up to less than 3.0 m (Wheelbase minimum of 7.8 m) | 12,285 | 11,700 | – | 8,873 | 8,450 | – |
| 3.0 m up to 3.1 m (Wheelbase minimum of 7.9 m) | 12,285 | 11,700 | – | 8,873 | 8,450 | – |
| Tridem Axles | ||||||
| 2.4 m to less than 3.0 m | 12,285 | 11,700 | – | 8,873 | 8,450 | – |
| 3.0 m to less than 3.6 m1 | 13,455 | 11,700 | – | 9,718 | 8,450 | – |
| 3.6 m to less than 3.7 m | 13,455 | 11,700 | – | 9,718 | 14,950 | 13,000 |
1 A trailer tridem axle group with an axle spread of 3.0 m or more but less than 3.6 m is allowed 24,000 kg on routes with a designated maximum GVW of 63,500 kg.
