Optimization of tandem wheel spacing for trafficability in sand

Heavy vehicles use multi-axle layouts to meet axle weight regulations and for better off-the-road mobility. Wheels in tandem are often used on these layouts. A study to optimize the wheel spacing for trafficability in sand was taken up. It was shown by field experimentation that soil pressure zones under wheels in sand do not exceed the wheel diameter and thus the criteria for selection of tandem wheel spacing shall be decided by the type of suspension on which the wheels are accommodated.