image = Ladder.scad.png |designers = [[User:Tim|Timothy Schmidt]] |date = 2021 |vitamins = |materials = |transformations = |lifecycles = |parts = [[Bolts]], [[End caps]], [[Frames]], [[Nuts]] |tools = [[Wrenches]] |techniques = [[Tri joints]] |git = |files = |suppliers =

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=Introduction= A ladder is a vertical or inclined set of rungs or steps.

There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK).

Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. They are commonly made of metal, wood, or fiberglass, but they have been known to be made of tough plastic.

=Challenges=

=Approaches=

Fixed ladder

Sectional ladder