A bracket supports the weight of stand-off standard-width rack-mount equipment and can collapse flat for storage or shipping. An embodiment comprises a back member along the bracket's mounting plane and two stand-off arms each having portions extending along the plane and extending normal to it. Each arm moveably attaches to permit positioning the arm when the bracket is not installed so as to decrease the arm's normal dimension, and each arm comprises at least one anchor permitting attachment to a supporting structure. Another embodiment concerns a method of installing a bracket with a back member and moveably connected stand-off arms, comprising moving each arm in a manner that increases the arm's extension in a direction normal to the mounting plane, and attaching to at least one supporting structure each stand-off arm at at least one anchor.