How to correctly calculate the load weight of caster wheel

How to correctly calculate the bearing capacity of castor weight in order to be able to calculate the load capacity of various casters need must know the weight of transport equipment and maximum load and the number of single wheel and castor. A single wheel load capacities as needed or castor calculation is as follows: T = ( E+Z) / M×N: - - - - - - - - - - - - - T = single wheel or castor to loading weight; - - - - - - - - - - - - - - - - - - E = weight of transportation equipment; - - - - - - - - - - - - - - - - - - Z = maximum load; - - - - - - - - - - - - - - - - - - M = the number of single wheel and castor used; - - - - - - - - - - - - - - - - - - Safety coefficient (N = About 1. 3 - 1. 5) 。