bar - a rigid piece of metal or wood; usually used as a fastening or obstruction or weapon; "there were bars in the windows to prevent escape"

doubletree - a crossbar on a wagon or carriage to which two whiffletrees are attached in order to harness two horses abreast

swingletree, whiffletree, whippletree - a crossbar that is attached to the traces of a draft horse and to the vehicle or implement that the horse is pulling

game equipment - equipment or apparatus used in playing a game

crosspiece - a transverse brace

goalpost - one of a pair of posts (usually joined by a crossbar) that are set up as a goal at each end of a playing field