Dreadnought vs. door

Forrix watched the adamantium door shudder under the impact of the Dreadnought's siege hammer, the metres-thick door buckling under the repeated blows. It was only a matter of moments until the door would be ripped from its frame by the screaming war machine. Thick chains, looped through bolted rings, ran from its legs and shoulder mounts, where two dozen of the strongest Iron Warriors stood ready to restrain the machine once it had broken down the door to the control tower.
...
	Kroeger watched the Dreadnought rip the bludgeoned door from its frame and hurl the massive piece of metal through the air. The mad howl of the machine echoed across the spaceport as its keepers dragged its massive bulk away from the low-ceilinged interior of the tower.

Storm of Iron