Which ladder type is known to be heavier and adjustable in length?

The extension ladder is recognized for its adjustability in length, allowing firefighters to reach various heights as needed during emergencies. This type of ladder comprises two or more sections that slide apart, permitting it to be extended or retracted to suit the situation at hand. The construction of extension ladders typically involves heavier materials such as aluminum or fiberglass for strength and stability, which contributes to their overall weight.

The added weight of an extension ladder is a trade-off for its functionality, enabling it to support more substantial loads and withstand the demands of firefighting operations. The design is particularly useful for reaching higher points, such as rooftops or upper windows, where access may be critical during rescue or firefighting efforts.

In contrast, other types of ladders, like folding ladders or straight ladders, do not offer the same level of adjustability and may be constructed for lighter usage or quick deployment. Roof ladders, while designed for roofing operations, typically do not possess the extension feature that characterizes the extension ladder.