Patent ID: 8061926
Filing Date: 2011-11-22
Classification: E01F

Abstract:
1. A crash barrier beam suitable for temporary placement on a road, the beam comprising a housing which in profile has a laterally extending base for contact with the road, the base being substantially flat or inclined at an angle to the horizontal, an impact wall comprising a lower wall section and an upper wall section, and a top section having a box-like cross-section, the impact wall extending upwardly at an angle from the base to taper towards the top section, wherein the impact wall has an inwardly directed stepped deflection running along the length of the beam between the lower wall section and the upper wall section, and an outwardly directed stepped deflection running along the length of the beam where the impact wall meets the top section, the inwardly and outwardly stepped deflections being on angle with respect to the horizontal, and wherein the base, the impact wall and the top section are formed from a single sheet of material or from a pair of opposed mirror image sheets of material joined at the top section to provide a continuous impact surface to an impacting vehicle and, in the event of an impact, the gradient of the impact wall and the inwardly and outwardly stepped deflections assist in redirecting an impacting vehicle wheel back towards the carriageway away from the barrier.