LS Overload 9 – 13

LS Overload 9 – 13 

Refers to the overload ratings of elevators, where the ability to bear the excess weight of the elevator is determined based on a certain criterion. Overload capacities range between 9 and 13 units. From the pattern you mentioned, it appears that LS is an abbreviation for “Load Standard”, and the numbers 9 – 13 refer to the upper limits of overload (tons or kilograms) that the elevator can safely handle. According to this standard.

                                                     elevator                                                                          

Elevator
the elevator
Elevators