The disclosed system, method and device for construction generally includes a mullion having a guide track disposed therein and a custom fitting suitably adapted to support a construction section via substantially adjustable attachment to the guide track. Disclosed features and specifications may be optionally controlled, adapted or otherwise modified to improve the retention and/or support of construction sections in a variety of operating environments. Exemplary embodiments of the present invention generally provide improved aesthetic presentation and mechanical retention of construction panels in point-supported glass wall systems.