The ornamental design for a barrierrail, as shown and described.
FIG. 1 is a top and front perspective view of the barrier rail, showing our new design;
FIG. 2 is a right side elevation view thereof; the left side elevation view being a mirror image thereof;
FIG. 3 is an end view thereof;
FIG. 4 is a rear perspective view thereof; and,
FIG. 5 is a top plan view thereof.
The barrier rail is shown with a symbolic break in its length. The appearance of any portion of the barrier rail between the break lines forms no part of the claimed design.