A siderail assembly comprises a first siderail body and a second siderail body. The second siderail body is movably coupled to the first siderail body and configured to rotate between a first position and a second position with respect to the first siderail body about a rotational axis passing through the first siderail body. The second siderail body is positioned above the first siderail body in the first position and below the first siderail body in the second position.