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Section IV: Glossary
Page 67
Roadside - The left or driver's side of the vehicle when viewed from the rear,
opposite side from Curbside.
Rolling Resistance - The restraining forces contributed to the load when rolling
on wheels.
Rollback - See Car Carrier
Rope - See Wire Rope
Rub Rail - Member running longitudinally providing rub service on side of body.
S
SAE - Society of Automotive Engineers.
Safety Chain(s) - Used to connect the towing and towed vehicle as a secondary
coupling system to prevent separation of a vehicle trailer, converter dolly, or
towed vehicle, should the primary coupling become detached.
Safety Wrap - Wrapping the tow chain(s) around the grab hooks of the tow bar
inboard of chain.
Scotch Blocks - A device used to prevent chassis movement.
Serial Number - An identification number stamped on a metal plate by the
passenger car, van, or truck manufacturer (see VIN), or the towing equipment
manufacturer, and placed on chassis, body, or components for identification
purposes.
Sheave - A wheel grooved for a wire rope to transfer power.
Shipping Weight - The dry weight of a complete truck with all standard equipment
including grease and oil but without and fuel or coolant.
Side Rail - Horizontal extensions of the body sides, either sheet or tubular metal.
Slew - A rotating super structure about a vertical axis.
Snatch Block - A single or multiple pulley used to reduce line tension or change
cable direction.
Spacer Blocks - Used in conjunction with wood beams to provide additional
clearance between the tow bar, chains, and the body of the casualty vehicle.
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