Duty Rating (Ladder)
The Duty Rating of a ladder identifies the maximum weight capacity the ladder can safely carry. This rating applies to various types of portable ladders, including step ladders, extension ladders, single ladders, articulating ladders, and platform ladders.
The weight of the user, including clothing, tools, and materials must not exceed a ladder’s duty rating.
Ladder Duty Rating Categories
| Duty Rating | Weight Capacity | Use |
|---|---|---|
| Type IAA (Extra Heavy Duty) | 375 lbs | Suitable for heavy-duty professional use, such as technicians, contractors, public utilities, and construction workers. |
| Type IA (Extra Heavy Duty) | 300 lbs | Designed for professional services. They are commonly used by technicians, contractors, electricians, and maintenance workers. |
| Type I (Heavy Duty) | 250 lbs | Widely used by professionals in various fields, including construction, painting, and maintenance. |
| Type II (Medium Duty) | 225 lbs | Suitable for commercial applications, such as interior decorators and maintenance workers. |
| Type III (Light Duty) | 200 lbs | Primarily used for light-duty tasks. |
Identifying a Ladder's Duty Rating
The Duty Rating of a ladder can be found on the specifications label. Safety standards require a Duty Rating sticker to be placed on the side of every ladder.
Do not assume that a longer ladder has a higher weight capacity. There is no relationship between ladder length and weight capacity.