A method for assembling a sprinkler support assembly, the method including fitting a saddle of a mounting bracket over a grid support of a ceiling system; fastening an attachment leg of the mounting bracket to a suspension frame of the ceiling system with a fastener, the attachment leg disposed at a first bracket end of the mounting bracket, the saddle disposed at a second mounting bracket end of the mounting bracket opposite from the first bracket end, the grid support extending laterally outward from the suspension frame; and securing a sprinkler drop of a fire sprinkler assembly with a clamp, the clamp attached to the mounting bracket.