This paper presents an experimental program that involved tests on full-scale RC slab-column edge connections. The aim of this work was to examine a new method for strengthening existing RC slabs for punching shear. The new strengthening technique consists of shear bolts externally installed in holes drilled through the slab thickness. Different configurations of the shear bolts around the column were tested. Four slabs were strengthened and 2 slabs, used as control specimens, did not contain any shear reinforcement. Two of the tested slabs (1 strengthened and 1 control) contained openings in the area of the column. Slab dimensions were 1540 x 1020 x 120 mm with square columns. The openings, where present, were square and directly adjacent to the inner face of the column. The slabs were tested to failure under monotonic vertical shear forces and unbalanced moments. The presence of shear bolts substantially increased the punching capacity and ductility of the connections.