Sash window counterbalance brake arrangement

A locking balance shoe for a sash window counterbalance arrangement includes at least one moveable locking abutment element. A cam of the balance shoe is moveable to operatively move and urge the at least one moveable locking abutment element from the first unlocked position to a second engaged locking position. The at least one moveable locking abutment element is diagonally movable and is moved diagonally by the cam and in the second engaged position the at least one moveable locking abutment element engages and abuts against and within a corner region of the window jamb channel between a pair of walls of the window jamb channel to frictionally lock the balance shoe in place.