The ornamental design of an interlockingbuildingelement, as shown and described.
FIG. 1 is a top-front perspective view of a interlocking building element
in accordance with my design, and showing the interlocking building
element having a thickness suitable for an interlocking brick;
FIG. 2 is a top plan view of the interlocking building element shown in
FIG. 1;
FIG. 3 is a front elevational view of the interlocking building element
shown in FIGS. 1 and 2, with the rear elevational view thereof being
substantially identical;
FIG. 4 is a side elevational view of my design as viewed from the left side
of FIG. 2, with the right side elevational view thereof being
substantially identical; and,
FIG. 5 is a bottom plan view the interlocking building element shown in
FIG. 1.