a hinge for rotatably mounting a barrier member to structural means which comprises first hinge mounting means having means for attachment thereof to the structural means ; second hinge mounting means having means for attachment thereof to the barrier member ; a first hinge member mounted for rotation with the second hinge mounting means ; a second hinge member positioned in engagement with the first hinge member and means for preventing rotation of the second hinge member with respect to the first mounting means . each hinge member has corresponding engaging surfaces configured to permit a staged rotation of the barrier means into a plurality of predetermined positions . applicants have also developed a novel method for constructing the hinge of the invention .