It snagged on a guard rail and the ship rolled.
Times,Sunday Times
He was flung against the guard rail and went into cardiac arrest.
The Sun
We need a guard rail and a gift shop.
Times, Sunday Times
Marks on the guard rail suggested that the driver may have deliberately rammed the side of the road in an attempt to slow the coach down.
Times, Sunday Times
It has no guard rail at its edge, however, which means you have to be careful not to leap inadvertently into the freezing water.
Globe and Mail