The HLTT Mass Calculator assists users in determining the maximum permitted tow load for a Heavy Lift Tow Truck based on its steer axle tare mass, wheelbase, rear axle tare and maximum rear axle load, and coupling rear overhang.
Enter the vehicle measurements and actual axle masses. The calculator determines the Steer Axle percentage and the Maximum Load, based on the lesser of the Safe Work Load and the Compliant Tow Load calculations.
This tool is intended as a practical assessment aid only. Users are responsible for ensuring that all vehicle masses, ratings, and operating conditions comply with the applicable regulatory, manufacturer and engineering requirements.
Note: Maximum Load is based on the lesser of the Safe Work Load calculation and the Compliant Tow Load calculation.