Here is a brief walkthough on ladder. For many tasks, the rigid ladder is the type often used. Rigid ladders come in many varieties, from the fixed to the roof ladders. The fixed ladder is the most basic, and has no moving parts. Extension ladders are the type that can be lengthened, since one part is nested in the other for storage. Step ladders are always joined by a hinge at the top of its inverted V form. The one with a platform is of course called the platform step ladder. Roof ladders come with hooks that set them firmly hooked on the roof. Aluminium is the preferred material for ladders, except those used for electrical work, for which fibreglass ladders are used.

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