X position
Moves the stairwell opening along wall X. Used when the opening is not in a room corner.
01 /Purpose
Move the stairwell opening along wall X.
This is required when the opening is not in a room corner.
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Offset from far wall
Moves the stairwell opening along wall Y. Used when the opening is not in a room corner.
Flight width
Distance perpendicular to the movement direction, between the structures bounding the passage. Total and clear widths are distinguished.
Tread thickness
Vertical size of the horizontal part you step on. Affects strength, freedom from squeaks, and precise step-height calculation.