bracketed — a support, as of metal or wood, projecting from a wall or the like to hold or bear the weight of a shelf, part of a cornice, etc.
halfway — to half the distance; to midpoint: The rope reaches only halfway.
parenthetical — of, pertaining to, noting, or of the nature of a parenthesis: several unnecessary parenthetic remarks.
transitional — movement, passage, or change from one position, state, stage, subject, concept, etc., to another; change: the transition from adolescence to adulthood.
intermediate — being, situated, or acting between two points, stages, things, persons, etc.: the intermediate steps in a procedure.