Q: Is there a minimum class that the ladders have to be rated? Can the ladders be wooden, aluminum and/or steel?
A: This all depends on the type of ladder, where the ladder will be used, and the type of forces exerted on the ladder. Typically ladders have several different ratings. Consider factors such as proximity of electrical lines or systems, contaminants such as chemicals and how they will have an effect on the ladder material, weight of the average individual who will be using the ladder, the weight of the objects which may be handled while on the ladder. Examples of a ladder classification system are as follows:
- Type III, light duty ladder is rated for 200lbs, red in color
- Type II, medium duty ladder is rated for 225lbs, green in color
- Type I, heavy duty industrial ladder is rated for 250lbs, blue in color
- Type IA, extra heavy duty industrial ladder is rated for 300lbs, orange in color
- Type IAA, special duty ladder is rated for 375lbs, yellow in color
