A door structure, comprising:
- a first door frame defining a first opening for a door leaf, wherein the first door frame comprises a first hinge frame portion and a first lock frame portion arranged to be on opposite sides of the door leaf;
- the door leaf comprising a first door handle on a first side, wherein the first door handle is configured to operate a lock structure of the door structure, and a second door handle on a second side, wherein the second door handle is configured to operate the lock structure;
- at least one first hinge attached to the first hinge frame portion and to the door leaf, wherein the at least one first hinge is arranged to allow the door leaf to open only to a first direction;
- a second door frame comprising a second hinge frame portion and a second lock frame portion arranged to be on opposite sides of the door leaf and defining a space for the first door frame therebetween;
- at least one second hinge attached to the first hinge frame portion of the first door frame and to the second hinge frame portion of the second door frame, wherein the at least one second hinge is arranged to allow the first door frame to open only to a second direction being opposite to the first direction;
- wherein the lock structure is arranged to selectively lock the door leaf to the first door frame when the first door frame is open from the second door frame and to selectively lock the first door frame to the second door frame while the door leaf is open from the first door frame;
- wherein the first and second door handles are arranged on the opposite side of the door leaf relative to the first and second hinge frame portions in a direction of width of the door leaf;
- and
- wherein the first hinge frame portion and the second hinge frame portion are arranged at the same side of the door leaf in the direction of width of the door leaf, wherein
- the lock structure is configured so that operating the first door handle causes the lock structure to lock the first lock frame portion to the second lock frame portion, and operating the second door handle causes the lock structure to lock the door leaf to the first lock frame portion.