No signs or sign anchors, braces, or guide rods shall be attached, fastened, or anchored to any fire escape, fire ladder, or standpipe. No sign or any sign anchor, brace, or guide rod shall be erected or maintained so as to hinder or prevent ingress or egress through any door, window, or fire escape or so as to hinder or prevent the raising or placing of ladders against such building by the Fire Department.