The historic sports complex closes after this season and will be replaced by a shopping center. Next year, the 49ers will move into a $1.2 billion stadium at the team's Silicon Valley headquarters in Santa Clara.
Since 2003, there have been more than two dozen cases of fans falling at stadiums across the United States, according to the Institute for the Study of Sports Incidents.
Most recently in Atlanta, baseball fan Ronald Lee Homer Jr. died last month after falling 85 feet following a tumble over Turner Field's fourth-level railing. Homer's death was the third at an Atlanta stadium in the past year.
Also last month in Denver, Broncos fan Noel Robinson was injured when he fell about 10 feet from an escalator at a preseason game.