How do I create a T-shaped staircase?
A staircase that shares a landing with two additional staircases can be created using Home Designer. The result is a T-shaped staircase configuration.
Constructing a shared landing between three staircases can be accomplished by following the steps in this article.
, then click and drag in a floor plan view to build the first section of the staircase.
tool still selected, click in the empty space between the two staircases. A landing will be created. At this point, two staircases in an L-shape design connect and share a landing.
You can turn railings on/off for a particular edge of the landing on the General panel within the Stair Landing Specification. For more information on how to edit the railings of a landing, please visit the Related Articles section below.

The same process works to create two staircases that join together at a landing and meet up with a single staircase that continues upward.