In the event of an emergency, this sign could be a potential life-saver in order to advise people of how they can vacate a building as quickly as possible. You should ensure that you have one of these signs alongside each door that must be opened in this way. Remember that not all people in a building may be familiar with this instruction, unless told accordingly. Fixing requires anything as simple as sticky pads, 'No-nails' type adhesive or double-sided tape.