A mounting structure for mounting a cab enclosure incorporating a ROPS therein to a frame of a construction machine allowing accessibility thereto from inside the cab enclosure. More specifically, the present disclosure provides a mounting structure for a cab enclosure incorporating a ROPS, the mounting structure including an isolation mount therein, the mounting structure providing desired structural rigidity to the ROPS while providing desired vibration damping characteristics to the cab enclosure and while allowing accessibility for service thereto.