The ornamental design for a building scaffolding brace assembly, as shown and described.
FIG. 1 is a front view of the building scaffolding brace assembly, particularly illustrating the building scaffolding brace assembly installed in a building scaffolding construction;
FIG. 2 is a perspective view of the building scaffolding brace assembly of FIG. 1;
FIG. 3 is a front view of the building scaffolding brace assembly of FIG. 1;
FIG. 4 is a rear view of the building scaffolding brace assembly of FIG. 1;
FIG. 5 is a left side view of the building scaffolding brace assembly of FIG. 1;
FIG. 6 is a right side view of the building scaffolding brace assembly of FIG. 1;
FIG. 7 is a top view of the building scaffolding brace assembly of FIG. 1; and,
FIG. 8 is a bottom view of the building scaffolding brace assembly of FIG. 1.
The broken lines illustrate portions of the design that form no part of the claim.