Patent ID: 7878485

Claim:
A roadway guardrail system comprising: a rail having a plurality of mounting apertures; a plurality of support posts and of block-outs, each support post comprising a longitudinally extending channel and a slot extending longitudinally along a portion of the length of the post such that a portion of the slot aligns with a respective rail mounting aperture at a desired rail height; each block-out positioned between the rail and one of the support posts, the block-out comprising: a top portion, a bottom portion, a front face engaging the rail, and a rear face engaging a respective support post; a block-out mounting hole extending from the front face to the rear face; and at least one projection extending from the rear face interengaging the longitudinally extending channel in a respective support post, and adapted to longitudinally slide within the channel upon vehicular impact with the rail; and a plurality of fasteners each fastening the rail to one of the support posts, each fastener extending through a respective mounting aperture, a respective block-out mounting hole, and a respective slot and adapted to longitudinally slide within the slot upon vehicular impact with the rail.