to snap into engagement with the narrow flange hem edge 45 when the bracket portion 29 is pushed into the channel 19 this snap fit is a convenience to the installer since the bracket 26 and the main runner 12 if it is attached is are immediately held in the channel while being horizontally adjustable when in a proper position the bracket 26 is fixed to the channel web 43 with a self drilling screw 40 or other suitable fastener through a hole 38 in the portion 29 the bracket 26 can be fixed to a main runner 12 with a single self drilling screw 40 upper and lower edges 52 53 of the runner engaging portion 28 of the end bracket are proportioned to fit closely with the bottom of the reinforcing bulb 21 and top of the flange 23 when positioned against the main runner web 22 when held against the web 22 by a single self drilling screw 40 or other fastener positioned in a hole 38 the bracket 26 cannot perceptibly rotate relative to the main runner 12 and consequently the main runner cannot droop at the bracket under the weight of the ceiling typically the channel 19 is secured to a wall by self drilling drywall screws 55 fig2 through the channel web 43 any wall facing material such as drywall and into studs 54 an upper flange 42 or 41 of the channel 19 stiffens the channel web 43 and prevents it from pulling away from the wall to which it is attached due to the weight of the ceiling consequently.