| ASME A17.1 code requirements for minimum rated capacity are as follows: |
| Class A |
(General Freight Loading) – 50 lbs. per sq. ft. |
| Class B |
(Motor Vehicle Loading) – 30 lbs. per sq. ft. |
| Class C-1 |
(Industrial Truck Loading – truck carried by elevator) – 50 lbs. per sq. ft., but not less than load, including weight of truck. |
| Class C-2 |
(Industrial Truck Loading – truck is normally used for loading and unloading only, and is not usually carried by elevator) – for elevators of 20,000 lbs. capacity or less capacity shall equal the weight of the loaded truck – maximum load on platform during loading and unloading not exceed 150% of rated load. |
| Class C-3 |
(Other loading with heavy concentrations where truck is not usually used) – 50 lbs. per sq. ft., but not less than load. |
| NOTE: Square feet area of platform is determined by net inside area. |