A storage rack system is provided that includes an improved cross bar attachment to create the framing for storage shelves. The cross bars are locked or secured against undesired movement and rolling to create a shelf that properly supports loads. The cross bars extend between the deck beams such that flanges at the ends thereof overlap the top of the deck beams. The flanges include a tab that extends downwardly to engage with an opening on the top of the deck beams. The lateral support further includes a stabilizer that is fastened to the side wall of the deck beams to prevent rolling or dislodgement of either member.