a shaft wall assembly system including triangular shaped steel studs with one or more layers of wall board secured to one side of the triangular shaped steel studs . the triangular steel studs preferably rest in a notched floor runner and a notched ceiling runner . the one or more layers of wall board are then directly attached to a flat side of the triangular stud with properly sized steel screws . this system will be useful as a shaft wall system or in locations where attachment of wall board to both sides of a wall system is not feasible .