A bridging device ( 10 ) for providing a bridging surface ( 12 ) between two points comprising a stack of interjoined beams ( 14 ) housed in a retracted position in a housing ( 11 ) mounted at a first point; and a drive system that drives the beams ( 14 ) to slide one over the other to telescopically extend out of the housing ( 11 ) from the retracted position to an extended position to thereby form a bridging surface ( 12 ) to a second point.
