Which of the following materials is not used to make stepladders?

Stepladders can be constructed from a variety of materials, but one of the main considerations for choosing a material is its safety, weight, and durability. Fiberglass, aluminum, and wood are all commonly used for stepladders.

Fiberglass is popular because it is lightweight, strong, and does not conduct electricity, making it a safe choice for electrical work. Aluminum is favored for its lightweight properties and resistance to corrosion, which is ideal for both indoor and outdoor use. Wood was traditionally used because it provides good stability and has a high strength-to-weight ratio, though it may be less common now due to the advancement of newer materials.

While steel is a durable and strong material, it is typically heavier and can rust if not properly treated, making it less favorable for the design of stepladders, which require portability and ease of use. Therefore, while steel can be used in certain ladder types, it is not a standard material for stepladder construction. Thus, the correct response identifies steel as the material not typically used to make stepladders.