Maximize structural protection: A secure room should have full height walls
and fireproof ceilings.
Minimize external access (doors): A secure room should only have one or
two doors--they should be solid, fireproof, lockable, and observable by
assigned security staff. Doors to the secure room should never be propped
open.
Minimize external access (windows): A secure room should not have
excessively large windows. All windows should have locks