INDUVIDUAL WAS LOADING PIECE OF EQUIPMENT ON LOW BOY TRACTOR TRAILER. HE WAS PUTTING ON THE TIE DOWN STRAPS, WHEN HE STEPPED OFF OF TRAILER TO GROUND ABOUT 18"" CAUGHT SIDE OF RIGHT LOWER LEG O N SMALL OUT RIGGER THAT WAS STICKING OUT PUT RIGGER IS 16"" LONG AND 12"" HIGH USED FOR HOLDING BOARDS. THIS CAUSED A LACERATION TO THE SIDE OF RIGHT LOWER LEG REQUIRING STITCHES.