or elements that extend or exist horizontally away from the wall or corner 13 and are active in supplying directly or indirectly vertical support of the ceiling grid and tiles of a suspended ceiling system the horizontal leg 12 which in use as will be discussed supports adjacent suspended ceiling structure has two generally horizontal sections 16 17 and a generally vertical stiffening web 18 extending between and integral with the sections 16 17 the illustrated sections 16 17 are unequal in width but not limited to that the section 16 adjacent the corner 13 being about u00be u2033 wide and the section distal from the corner being about 1 u00bc u2033 wide the proportionate width of the sections 16 17 can be varied as desired but their combined width should be at least about 2 u2033 to satisfy seismic code requirements a hem 21 is formed on an upper edge 22 of the vertical leg 11 distal from the corner 13 by folding the sheet material back on itself to reinforce this edge the hem 21 is sufficiently folded so that an actual edge 23 of the sheet stock contacts the vertical leg 11 at a line below the upper edge 22 adjacent a free edge 24 of the horizontal leg section 17 the horizontal leg 12 includes a vertical stiffening flange or element 26 the stiffening flange 26 is integrally joined to the leg section 17 at a 90 degree corner 27 and has a hem 28 at its upper edge 29 the sheet material of the hem 28 is folded back so that its actual edge 31 contacts the stiffening flange 26.