Triaxle and Dump Semi-Trailer Weight Reductions
8. (1) For combinations of vehicles to which this section applies and section 3 does not apply, maximum allowable gross vehicle weights for the purposes of section 118 of the Act shall be determined by subtracting the amounts in the applicable subsection of this section from the lowest of the following amounts: 1. The amount calculated under clause 118 (1) (a) of the Act. 2. The amount calculated under clause 118 (1) (b) of the Act. 3. The maximum allowable gross weight determined under section 2 of this Regulation. O. Reg. 186/02, s. 4. (2) For combinations of vehicles to which both this section and section 3 apply, maximum allowable gross vehicle weights for the purposes of section 118 of the Act shall be determined by subtracting the amounts in the applicable subsection of this section from the amount permitted under section 3. O. Reg. 186/02, s. 4. (3) Effective January 1, 2003, 4,500 kilograms shall be subtracted when the combination of vehicles includes a single end dump semi-trailer or open-top hopper dump semi-trailer manufactured in or after 2003 unless it is, (a) a semi-trailer with no axles deployed other than a single axle; (b) a semi-trailer with no axles deployed other than a tandem axle; (c) a semi-trailer with no axles deployed other than a tridem axle; (d) a self-steer triaxle semi-trailer; or (e) a self-steer quad semi-trailer. O. Reg. 186/02, s. 4. (4) Where two or more liftable axles are deployed on the semi-trailer that is part of the combination of vehicles to which subsection (3) applies, 9,000 kilograms shall be subtracted under that subsection instead of 4,500 kilograms. O. Reg. 186/02, s. 4. (5) Effective January 1, 2006, 3,000 kilograms shall be subtracted when the combination of vehicles includes a single semi-trailer that is a triaxle semi-trailer unless it is, (a) a self-steer triaxle semi-trailer; (b) an open-top hopper dump semi-trailer; (c) an end dump semi-trailer; (d) a carbon dioxide tank semi-trailer; (e) a cryogenic tank semi-trailer; or (f) a tag-axle tank semi-trailer. O. Reg. 186/02, s. 4. (6) Effective January 1, 2011, 4,500 kilograms shall be subtracted when the combination of vehicles includes a single semi-trailer that is a triaxle semi-trailer unless it is a self-steer triaxle semi-trailer or any type of tank semi-trailer. O. Reg. 186/02, s. 4. (7) Effective January 1, 2011, 4,500 kilograms shall be subtracted when the combination of vehicles includes a single end dump semi-trailer or open-top hopper dump semi-trailer manufactured before 2003 unless it is, (a) a semi-trailer with no axles deployed other than a single axle; (b) a semi-trailer with no axles deployed other than a tandem axle; (c) a semi-trailer with no axles deployed other than a tridem axle; (d) a self-steer triaxle semi-trailer; or (e) a self-steer quad semi-trailer. O. Reg. 186/02, s. 4. (8) Where two or more liftable axles are deployed on the semi-trailer that is part of the combination of vehicles to which subsection (7) applies, 9,000 kilograms shall be subtracted under that subsection instead of 4,500 kilograms. O. Reg. 186/02, s. 4. (9) Effective January 1, 2021, 4,500 kilograms shall be subtracted when the combination of vehicles includes a single triaxle semi-trailer that is a tank semi-trailer unless it is a self-steer triaxle semi-trailer. O. Reg. 186/02, s. 4. (10) In this section, a combination of vehicles which is subject to a reduction of maximum allowable gross vehicle weight shall remain subject to that reduction unless the amount of the reduction is increased. O. Reg. 186/02, s. 4.