Employee was moving a piece of steel 1/2"" x 6"" x 84"" in the steel storage area. As he lifted one end and began to move to his left, he tripped over another piece of steel and fell. He had a cut on his left knee that required 3 stitches. The steel was not organized very well and weeds had grown up in the area. He was on restricted duty until 9/13/13.