It's empty, but you try the light switch just inside the door.....just your luck.....no lights. You open the fuse box in front of you and see that the service line has been removed. This building has no electricity. You know your time is running short and the lantern won't last forever so you go to the door at the far end. Damn!! The door handle is missing and it's heavy steel.....no prying this one open. Now what?
You go over to the front door to see if you can attach the knob you found earlier. No, not going work. There's nothing sticking out of the door to attach it to. Turning back you pass the windows wishing you had a way to open them. Hmmm, can't seem to think of anything.....oh well. Time to try the grate now with the wrenches.
Well if the bag of bolts is heavy enough you can tie the rope to it, and the nylon string, then try and throw the bag through the gates on the window, and then try to tug the bag under the bars thus wraping the rope around the window bars.
There is a way to get up to the window using a couple items you have in your possession. You can also backtrack at any time to pick up an item you could not carry before. Just remember the lantern won't last forever, so don't spend alot of time backtracing. While you're giving that some thought you return to the grate to try the wrenches.