A nonadjustable ladder that consists of only one section is referred to as what type of ladder?

A nonadjustable ladder that consists of only one section is referred to as a wall ladder. This type of ladder is designed to be fixed in place against a wall or similar structure, providing stable access at a specific height without the ability to extend or adjust its length. Wall ladders are typically straightforward in design, focusing on safety and stability for reaching high places, such as rooftops or upper stories of a building.

Other types of ladders mentioned have different characteristics. Combination ladders can be configured in various ways, providing versatility for multiple uses. Folding ladders are designed to collapse for easy storage and transport, which does not apply to the rigid format of a wall ladder. Special-use ladders are tailored for specific applications and may include specialized features unlike the standard functionality of a wall ladder. Thus, the wall ladder designation accurately captures the nature of a nonadjustable, single-section ladder.