What is the difference between static and dynamic load weight capacities on your casters?

A static load bearing is the weight applied without any build up of energy, and therefore is to remain motionless. Force, pressure, and gravity remain static or are applied gradually. A dynamic load bearing is measured by the application of rapid force or pressure to an object. Casters that hold a stationary object in place would be considered static. Casters that are used for objects that will be in constant motion with additional weight applied (i.e. for a chair where people would be sitting and standing or a cart where objects are thrown on top for transport) would be considered dynamic.