The ornamental design for an equipmentstoragerack, as shown and described.
FIG. 1 is a front elevational view of an equipment storage rack showing our new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a top perspective view thereof.
The broken line showing of the remainder of the storage rack and the broken lines showing of the arm are for environmental purposes only and form no part of the claimed design.