Black Plague - stuck after cameras in Chemical Lab

[Desperate4God]

It's been a while since I played Black Plague, but I remember having to "pull" the shelf in bursts. Another way to explain it: you're having to tug at it because it's so heavy. I don't think you can simply pull it like you normally would,

Spoiler below!

because it's weight keeps the Infected permantly out of the room.