Let's go through the various ladder varieties and define each one in turn.
For a definition of the various parts of a ladder, see: ladder parts and components.
A basic ladder used for accessing heights.
Foldable with a top section for standing, self-supporting without leaning.
Variable height by adjusting the sliding sections, suitable for greater heights.
Combines features of several ladder types, versatile for different uses.
Wider base with crossbars for stability, ideal for heavier tasks.
Features a flat platform instead of rungs, good for longer work periods.
Extends by sliding sections, compact when folded.
Lightweight with hooks, designed for fruit picking.