The ornamental design for a railing for a patiodeck, as shown and described.
FIG. 1 is a top, front and side perspective view of a railing for a patio deck showing my new design.
FIG. 2 is a front elevation view for the railing for a patio deck.
FIG. 3 is a left side view of the railing for a patio deck.
FIG. 4 is a top plan view of the railing for a patio deck; and,
FIG. 5 is a bottom plan view of the railing for a patio deck.
The railing for a patio deck is shown with a symbolic break in its length. The appearance of any portion of the railing for a patio deck between the break lines forms no part of the claimed design.