Stair assembly

A stair assembly comprising:

• a first slide assembly comprising:
• a first base frame, and
• a first sliding frame mounted to the first base frame, and operable to slide horizontally in a first direction with respect to the first base frame between retracted and extended positions;
• a housing mounted to the first sliding frame and comprising:
• a first fascia coupled to a first end of the first sliding frame,
• a second fascia coupled to a second opposite end of the first sliding frame, and
• a platform coupled to the first and second fasciae, the platform, first and second fasciae, and first sliding frame defining an interior volume;
• a second slide assembly mounted to the first sliding frame and comprising:
• a second base frame, and
• a second sliding frame mounted to the second base frame, and operable to slide horizontally in a second direction with respect to the second base frame between retracted and extended positions, the second direction perpendicular to the first direction;
• and
• a first step module mounted to the second sliding frame and comprising:
• first and second sidewalls, and
• a plurality of first steps, each first step coupled to the first and second sidewalls;
• wherein when the second sliding frame is in the retracted position, the first step module is located within the interior volume.

A method of deploying a stair assembly, the method comprising:

• horizontally moving a platform mounted on top of a sliding frame with respect to a base frame, wherein the sliding frame bears at least a portion of a weight of the platform;
• horizontally moving a first step module mounted on top of the sliding frame and below the platform with respect to the platform, wherein the first step module comprises a plurality of first steps;
• and
• moving a second step module with respect to the first step module from a stowed position to a deployed position, wherein the second step module comprises a plurality of second steps coupled to the first step module.