Considerations When Choosing Roller Capacity

Rollers should ideally be used on solid surfaces such as steel so the weight is equally divided across each load wheel.

When operating 4 rollers on uneven surfaces such as concrete, select a roller with double the mathematical roller capacity to safeguard against overloading due to the load rocking and shifting. If operating more than 4 rollers, carefully select suitable roller capacity to prevent overloading in case load rocks on uneven surfaces and shifts weight.

SOLID/SMOOTH SURFACE or TRACK Example: An equally distributed load of 40 tons, translates into 20 tons to be supported on each side	IMPERFECT/TEXTURED SURFACE If the load rocks on an uneven surface, one roller looses contact with the load and the weight shifts to the closest roller
Capacity needed: 10 tons each roller	Capacity needed is doubled: 20 tons each roller

ADDITIONAL CONSIDERATIONS

Wheels can be point-loaded when travelling over reccesses and uneven surfaces.	...or when hitting an obstacle
Side forces such as wind may cause uneven weight distribution on rollers resulting in possible side/ overloading.

Consider selecting higher capacity rollers to offset the hazards of point-loads, uneven weight distribution, and side forces.