He just begins to drag himself across the concrete roof of the fortress.
Five thrust upward from within the building, punching through the concrete roof.
How long had he taken to run across the battered but unpierced concrete roof?
The control room was on the left, with a hatch in the concrete roof.
The rubble storage building is covered with a flat concrete roof.
A concrete roof was added in 1952 to protect the cathedral from rain.
The plant's concrete roof, he added, will double as a parking lot.
Something slammed into the concrete roof over my head.
The pouring of the concrete roof had to be done in one day.
The weight of the concrete roof is 5,400 tons.
