device to the i beam 4 the clamp involves a retainer section 44 which is held by a cord cable or elastic device 48 to an extension 52 which projects down extension 52 which extends down from the slant plate device 40 when the cable or elastic device 48 is tightened so as to pull the extension and retainer together the slant plate device 40 is held securely to the i beam 4 so as to prevent vandals from standing on the lower flange 12 those skilled in the art will recognize the numerous ways in which the cord cable or elastic device 48 could be mounted between the retainer section 44 and the extension 52 as shown in fig2 the cable is fixedly attached in the retainer section 44 and is adjustable relative to the extension 52 by rotating a nut 54 an advantage of the clamp arrangement shown in fig2 is that the slant plate device 40 can be attached or removed by adjusting the cable or elastic band 48 this is beneficial in that the slant plate device 40 can be removed if work was to be performed on the bridge additionally if the particular i beam 4 to which the slant plate device 40 is attached must be replaced the slant plate device can simply be removed and reattached to the new i beam referring now to fig3 there is shown a side cross sectional view of a slant plate device 60 positioned between the web 16 and the lower flange 12 of an i beam.