Abstract: A sprinkler includes a body, a frame, a button, and a support bridge. The body includes an opening arranged around a sprinkler axis. The frame is coupled with the body. The button includes a slanted surface to be received in the opening. The support bridge includes a center, a first arm extending from the c enter, a second arm extending from the center, opposite the first arm, and an arch extending from the first arm to the second arm.

Abstract: A fire protection system is provided for a space having a pitched roof constructed of structural members extending from a ridgeline to an eave, with respective channels therebetween. A first row of sprinklers is mounted to a first branch line extending generally parallel to the ridgeline. Each sprinkler is positioned within a respective channel, with consecutive sprinklers spaced apart having no less than one, and no more than five, channels therebetween. A second row of sprinklers, downslope from the first row, is mounted to a second branch line extending generally parallel to the first branch line. Each sprinkler thereof is positioned within a respective channel, with consecutive second row sprinklers spaced apart as in the first row. Each second row sprinkler is also placed within a different channel from each first row sprinkler. A farthest number of channels between a first row sprinkler and a second row sprinkler is three.