respect to the tab 34 however in place of the tab 32 the wall angle 30 of fig1 and 13 includes a second tab 52 lanced from the horizontal ledge 36 of the wall angle 30 this second tab 52 has a free end 54 displaced upwardly from the horizontal plane defined by the horizontal ledge for engaging the edge of one of the flanges 24 to locate the beam 22 the other tab 34 holds the beam 22 in place preferably the free end 54 of the tab 52 is bent downwardly to provide a larger surface for engagement with the edge of the flange under certain circumstances there may be a need to provide for a more secure attachment of the grid system to the wall angle one such circumstance is where the suspension system is being installed in a region where seismic activity is relatively common securing the perimeter of the grid system to the wall angle helps to ensure that the suspended ceiling will not collapse during a seismic event due to the ends of the beams being displaced laterally off of the horizontal ledge of the wall angle to this end the vertical leg 44 of the wall angle 30 also preferably includes a u201c seismic u201d tab 56 that after the runner is positioned relative to the wall angle by the tabs on the horizontal ledge 36 is bent outwardly from the vertical leg 44 of the wall angle so as to.