Motor Vehicle Safety Regulations — 223
223 (1) The definitions in this subsection apply in this section. dangerous goods has the same meaning as in section 2 of the Transportation of Dangerous Goods Act, 1992. ( marchandises dangereuses ) ground clearance means the vertical distance from the bottom edge of a horizontal member to the ground. ( garde au sol ) guard width means, in respect of a rear impact guard that is installed on a trailer, the maximum horizontal guard dimension that is perpendicular to the longitudinal vertical plane passing through the longitudinal centreline of the trailer. ( largeur du dispositif de protection ) horizontal member means the horizontal structural member of a rear impact guard. ( pièce horizontale ) hydraulic guard means a rear impact guard designed to use fluid properties to provide a resistance force to deformation. ( dispositif de protection hydraulique ) low-chassis trailer means a trailer that has a chassis that extends behind the rearmost point of the rearmost tires and that has a lower rear surface that meets the configuration requirements of subsections (6) to (8). ( remorque à châssis surbaissé ) outboard means, in respect of a trailer, away from the trailer centreline and toward the side extremities of the trailer. ( extérieur ) pulpwood trailer means a trailer that is designed exclusively to carry harvested logs or pulpwood and that is constructed with a skeletal frame with no means for the attachment of a solid bed, body or container. ( remorque pour bois à pâte ) rear extremity means the rearmost point on a trailer that is above a horizontal plane located above the ground clearance and below a horizontal plane located 1 900 mm above the ground when the trailer is configured as specified in subsection (7) and when the trailer’s cargo doors, tailgate and other permanent structures are positioned as they normally are when the trailer is in motion. However, non-structural protrusions, including but not limited to the following, are excluded from the determination of the rearmost point: (a) tail lamps; (b) rubber bumpers; (c) hinges and latches; and (d) flexible aerodynamic devices that are capable of being folded to within 305 mm from the transverse vertical plane tangent to the rearmost surface of the horizontal member and that, while positioned as they normally are when the trailer is in motion, are located forward of the transverse plane that is tangent to the rear bottom edge of the horizontal member and that intersects a point located 1 210 mm rearward of the rearmost surface of the horizontal member and 1 740 mm above the ground. ( extrémité arrière ) rear impact guard means a device installed on or near the rear of a trailer so that, when the trailer is struck from the rear, the device limits the distance that the striking vehicle’s front end slides under the rear end of the trailer. ( dispositif de protection arrière ) rounded corners means the outermost ends of a rear impact guard’s horizontal member that curve upward. ( coins arrondis ) side extremity means the outermost point on a trailer’s side that is above a horizontal plane located above the ground clearance, below a horizontal plane located 1 900 mm above the ground, and between a transverse vertical plane tangent to the rear extremity of the trailer and a transverse vertical plane located 305 mm forward of that plane, with non-structural protrusions such as tail lamps, rubber bumpers, hinges and latches excluded from the determination of the outermost point. ( extrémité latérale ) tanker trailer means a trailer that is designed exclusively to transport dangerous goods and that meets the rear impact protection requirements of National Standard of Canada CAN/CSA-B620-98, Highway Tanks and Portable Tanks for the Transportation of Dangerous Goods (August 1998), including Appendices A and B, as amended in April 1999, March 2000, July 2000, April 2001, November 2001 and May 2002, published by CSA. ( remorque-citerne ) wheels back trailer means a trailer whose r