Patent ID: 8177194

Claim:
A frangible post for a guardrail, wherein the post is of a single piece construction and comprises: at least two first post members which, in use, are vertically oriented, and which define first and second parallel planes; and a second post member which has an outer surface defining a third plane which connects the first two post members to one another, wherein the first and second vertical planes of the first post members, are substantially orthogonal to the third vertical plane of the second member, wherein in use the post is positioned so the first and second vertical planes of the first post members are substantially parallel to the direction of traffic flowing past the guardrail, wherein said first post members have a region of weakness defined by a notch formed solely in each vertical edge of said first post members on the periphery of said first and second vertical planes such that the region of weakness bisects said first post members in a horizontal plane substantially orthogonal to both the first, second, and third planes spanning between said notches.