The ornamental design for a housingassembly for a perimeter blasting device, as shown and described.
FIG. 1 is a perspective view of a housing assembly for a perimeter blasting device showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof, the right side view being a mirror image thereof;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
FIGS. 1-6 include CAD lines that represent contour, not surface ornamentation. FIGS. 1-6 are illustrated as if light is projected from the upper left and accordingly, the thickness of some edges appears exaggerated to represent shadow, which forms no part of the claimed design. The parallel jagged lines in FIGS. 1-4 represent indeterminate length and form no part of the claimed design.