This paper verifies experimentally the structural performance of self compacted perforated beams having rectangular perforations. Three perforations sizes have been considered; namely, 200 x 200, 200 x300 and 200 mm x400 mm, respectively. The perforation depth to the beam total depth was kept constant for the three sizes (0.50). These perforations correspond to mass loss percentages of about 24, 29 and 31%, respectively, compared to that of the solid beam. Thus, one solid control beam along with three perforated beams having the three perforation sizes were prepared and tested up to complete failure. The perforation sizes of 200x200 and 200x300 enabled the perforated beams to manifest higher ultimate capacities by about 11% and 1.2% compared to that of the solid beam. On contrary, the perforated beam of perforations dimensions 200 x 400 showed lower ultimate capacity by about 17% compared to that of the solid beam. In addition, the sharp edges of the rectangular perforations enforced the perforated beams to be failed due to shear at the first web post for all perforated beam.