FIG. 1 shows a frontal perspective view of the support rack.
FIG. 2 shows a front elevation view.
FIG. 3 shows a left side elevation view.
FIG. 4 shows a top plan view.
FIG. 5 shows a right side elevation view.
FIG. 6 shows a rear elevation view; and,
FIG. 7 shows a bottom plan view.
I claim the ornamental design for a support rack, as shown and described.