Application and Improvement in Construction Planning and Scheduling by 4D CAD Modeling

4D CAD modeling have limitations when it is applied on civil engineering projects. Planning and Scheduling of construction activities is an important factor for development of construction industry. There are various tools available for planning of regular projects but complicated projects requires more accuracy in planning in order to save both time and money. Contractors and suppliers try to finish the project within schedule time of completion without any cost overruns. For that, they adopt various planning methodology. Still there is a vast difference between planning and actual site execution. The 4D CAD modeling is one such recent technique in which visual methods of scheduling is used for better co-ordination & communication among the project team. The 4D CAD model is the combination of 3D model with time. 4D simulation model is developed by linking schedule of construction with 3D model of construction project. The 4D model is an effective tool for understanding the progress of the project which allows the simulation & visualization of construction sequence. Therefore, efficient visualization & planning of construction activities is required for better cost control and avoid time overruns. 4D CAD modeling is the better tool for visualization and planning of construction activities. In this paper applicability of 4D CAD tool for planning, visualization, monitoring of various important construction activities like RCC elements of frame structure and benefits of 4D CAD modeling are studied.