I spawned in that room too. I too thought I couldn't get out, as there were no doors. I soon found out that I could walk through the wall, towards the factory. I think you can walk through walls if you are on the "wrong" side of them.
That thing in the second picture looks like a rally point, I'm confused as to why the Insurgents have them unless they are mapper placed, but if they are it would be pretty difficult to get it in a building.
"God will strike him down when he checks his email and sees young Fighter has turd burgling tendancies. Could you imagine going to church knowing your son takes it up the wrong 'un?" - [R-Dev]Gaz on 'Fighter137'