Baystation12/Baystation12 — pull request #6907 by PsiOmegaDelta (2014-10-31 10:42:00+00:00)
Title: (De)constructable emergency shutters.

Can now construct emergency shutter assemblies from metal sheets, same as door assemblies.
Requires air alarm circuits to complete, rather than airlock circuits.

![Right in the middle of the room is the best place for an emergency shutter.](https://www.dropbox.com/s/5iglhneqlr6so7h/EmergencyShutter.png?dl=1)