Elevator car and construction-time elevator arrangement and method

An elevator car comprising:

• a ceiling;
• a first floor for delimiting a first transport space above the first floor;
• a plurality of sidewalls, each sidewall extending from the first floor to the ceiling;
• and
• a second floor for delimiting a second transport space above the second floor, the second floor being between the first floor and the ceiling and extending from a first side wall to a second side wall of the plurality of sidewalls,
• wherein the second floor is a displaceable floor, the elevator car being shiftable between a double-decker-state and a single-decker-state by displacing the displaceable floor,
• wherein the displaceable floor is displaceable by pivoting between a horizontal position and an upright or at least a substantially upright position, the displaceable floor extending into the second transport space when in the upright position,
• wherein displacing the second floor enables merging of the first transport space and the second transport space such that a third transport space is formed, the third transport space extending from the first floor to the ceiling, and
• wherein a size of the first floor is substantially equal to a size of the second floor.