I am trying to build an arch roof using stairs and in doing so I need stairs to get a fixed stair shape. Here are some pictures to clarify:

Two stairs together can form a corner stair:

Minecraft stairs

However when the adjoining stair is removed, the corner stair reverts to a single stair shape:

Minecraft stairs

As you can see, the stair isn't fix as a corner stair. How can I do that?

  • What are you asking – stizzle84 Oct 8 '14 at 4:16
  • @stizzle84 Look at the stairs on the left on the top picture, Do you see how the left one is curved almost? Then once you destroy the stair next to it it reverts back to it's original state. I'm trying to keep it as it's curved corner state after deleting the accompanying block. The pair of stairs on the right are for reference to easier see the difference between the two pairs. – Baked Potato Oct 8 '14 at 5:05

Short answer: it can't be done. With certain mods however, it can possibly be imitated.

The way you are facing determines the direction the stair faces.

image depicting direction facing and stair orientation

If you place two stairs facing different directions (eg, one facing north, one facing east or west) they will form a corner.

Minecraft Stairs When you destroy a block, it will revert to it's original shape.

Minecraft Stairs

It also depends on what version of Minecraft you are playing, because corner stairs were released in version 1.4.2. Any version before this will not have this function

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  • The question is how can I stop the stair from reverting, or has that not yet been figured out? – Baked Potato Oct 8 '14 at 5:47
  • "the stair will revert to it's original shape." There are currently no ways to keep it as a corner stairs without mods. (Microblocks has ways to imitate this however). – Ben Oct 8 '14 at 5:55

You can lock the corner blocks into various block states (e.g. inner_left, inner_right, etc...) by tricking the logic as you position blocks. You can do things like this:

wall alcove

In general, start by adding a stair block, then another next to it with the same orientation. Finally, orient yourself 90 degrees to add the third stair which will complete a corner. Next delete the first block you positioned and the corner block should keep its state. It gets tricky to position corners near each other and takes some practice.

I first got this idea from practicing making a hot tub like this:

Hot tub and Beach

I'll try to make a video on the techniques.

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  • 2
    Neither your screenshot nor your link shows free-standing inner_left or inner_right stair blocks, which is what this question is about. – MrLemon Jan 19 '15 at 9:13

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