Fence
AssigneeAlcan Aluminium (U.K.) Ltd.
InventorsPeter John Thompson, Iain James McGregor
Life of this patent
Estimating the term…
Abstract
A crash barrier including a post secured to a base at its lower end, the post having a front face to which one or more rails are secured, the post also having two side faces and a rear face. The rear face of the post is formed with a horizontally extending notch having upper and lower surfaces. When an impact load is transmitted to the front face of the post, the post is caused to distort in a region including the notch so that the upper and lower surfaces of the notch close towards one another prior to any fracture at or adjacent the front face of the post or at or adjacent its lower end.
Claims28
A crash barrier (1) comprising at least one post (2) having a lower end (12) secured to a base (3), a front face (6) to which at least one rail (8) is secured, a rear face (7) and two side faces (9 and 10), characterized in that the rear face has a length and is formed at a position intermediate said length with at least one horizontally extending notch (13, 16, 17) having an upper surface (18) and a lower surface (19) so that, when the lower end is restrained, an impact load transmitted to the front face causes the post to distort in a region including the notch so that the surfaces close towards one another prior to any fracture at or adjacent at least one of the front face of the post and its restrained lower end.
Dependencies are inferred from the claim text.