Ladder
A ladder was an object consisting of a series of rungs that allowed one to access different levels of various structures.

The launch bay aboard  featured ladders to get into the s. ( et al.) Engineering was also equipped with several ladders. ()

The Jefferies tubes aboard  starships were also equipped with ladders and a maintenance shaft can be reached from sickbay by a ladder. ()

In 2151, Hoshi Sato surmised that the aliens aboard an unknown ship were bipeds, based on a ladder she noticed in one of the corridors. ()

Ladders were also installed in the cargo modules of  freighters to reach the lower part of the cargo module from the catwalk. ()

Ladders can also be found in the corridors aboard a Vulcan  starship. ()

Several ladders were present on various starships. They were also sometimes a component of fire escapes. () 

Rule 211 of the Rules of Acquisition stated, "Employees are the rungs on the ladder of success. Don't hesitate to step on them." ()

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Household tools