Excelsior

Hello.
Is the stairs. I am customizing my new house (thanks A LOT for the new lands) and I put stairs, but when I get out or even change to another floor the stairs are gone (dissapears).

In a completely different way (excuse my poor english and my new status in the server) . What is an IDOC?

IDOC = in danger of collapsing

Thank you. I knew that was initials, but don´t had idea from what.