Creating Mitered or Wrap Around Stairs

Reference Number: KB-00788

Last Modified: October 12, 2026

QUESTION

How do I create mitered or wrap around stairs on a deck?

Deck with wrap-around stairs leading to terrain

ANSWER

You can easily create wrap around or mitered stairs on a deck or other structure by simply dragging the stair edges to the corner where they should join. However, there are some requirements and considerations to be aware of:

The Allow Wrap setting must be enabled for at least one of the adjoining stair sections. This setting is located on the Style panel of the Staircase Specification dialog and is enabled by default.
Stair sections that wrap around a corner to meet one another must have similar attributes.
Curved stairs and stairs with multiple subsections cannot be wrapped.

To miter stairs

Select Build> Railing and Deck> Straight Deck Railing and draw a rectangular deck on your structure.
Select Build> Stairs> Draw Stairs or Straight Stairs from the menu, click on the outside edge of the deck railing that is parallel with the structure to place one set of stairs, then click again on the outside edge of the deck railing that is perpendicular to the structure to place another set of stairs.
Using the Select Objects tool, click on the first stair section that was placed, place the cursor over the desired Resize edit handle closest to the corner of the deck, then left-click and drag to extend the width of the stair section.
Repeat the process on the other stair section. Once both stairs sections are within 6 inches of the corner, the program will automatically wrap the stairs around the corner.

This process works for any angle you may have on your deck, to allow for a wide array of unique designs to fit any need.

Wrap around stairs at any angle

You can also apply this method to the outside or inside corners of decks, interior rooms with railings, and even stair landings.

Wrap around stairs on inside or outside deck corners