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Identify Constructability Issues for Various Trades With BIM. How Engineering and Architectural Workflows Are Integrated With the help of BIM

BIM (Building Information Modeling) helps to review a construction plan, identifying constructability issues during the pre-construction stage. BIM implementation detects potential obstacles and design flaws that might result in cost overruns and rework. The evaluation of the entire project process is made through BIM before construction. The whole project analysis can be made from concept design through as built, identifying issues that may be encountered due to design incompatibility, space conflict, circulation, logistics and more. Revisions and design update can also be tracked during design development of a project. Moreover, BIM helps to improve the site process.

Electrical Trade - Electrical BIM Services drawings of a large construction may not be equally comprehended and interpreted by all project stake holders. This leads to rework in construction and wastage of time and resource. 3d BIM collaboration is an efficient way of bringing all project stakeholders on the same platform. BIM Constructability Review helps in this regard by acting as a visual tool for managers, field personnel & other stake holders. Highest level BIM coordination ensures fast and error free construction, reducing field generated change orders and rework. Furthermore, installation disruptions and work stoppages are eliminated. Constructability issues identified by BIM in electrical trade include adequacy of space for installation, operation and maintenance, optimum use of fittings, use of bend radius as per codes, mounting heights as per codes, clearance between services and locating electrical items in proper place.

BIM helps to find several inconsistencies in the input drawings and incomplete information for concrete trade. Several conflicts get identified which could have affected the actual construction in terms of cost, material and manpower. BIM minimizes wastages by revising designs like changing pouring sequence, modifying mat slab thickness, terminating floor opening and more.

HVAC Trade- BIM coordination helps to identify clash and raised it to consultants, which results in revision of design. Coordination problems get resolved through drawing validation such as flue duct clashing with structure and other trades, FPB clash with wall and structure and more. The final HVAC model is produced by removing clashes through re-routing and re-sizing of duct as well as by changing elevation. This helps to pre-fabricate assemblies in quality set-up, reducing installation time, wastage and cost.

Seek constructability review through BIM and resolve clashes before construction. Constructability review and clash detection analysis are often performed with software like Autodesk design review, Navisworks and more. Choose a proficient BIM service provider to identify construction conflicts and fix them efficiently. BIM visual analysis helps to achieve building safety standards, enabling visualization of schedule with installation of permanent building parts & temporary safety arrangements before construction. Implement BIM to match your construction workflow in the perfect way.

The impact of building Information Modelling, or BIM, processes has been a turning point in the history of the construction industry. Design workflows have been altered by the arrival of BIM technology, and both the architecture and MEP (mechanical, engineering, plumbing) sectors have had to adjust themselves to emerging design process trends. Traditionally, architects and building engineers have had different design and documentation workflows. These practices have been modified and integrated by using BIM modelling.

In the MEP design sector, the traditional methods of developing a 2d design from a MEP designer into a coordinated 3d model by the contractor is finding less popularity. BIM modelling is largely responsible for this change, and we discuss how this is so.

A majority of engineering work in construction follows information received from the architects' design, for example column grids for the structural design or ceiling plans for MEP design. Architectural information, such as building geometry, is then used as input for structural load, heating and cooling load analysis by building engineers. Results gathered from such analysis are then applied to the required sizing of components such as structural units, heating and cooling systems. The number and characteristics of structural joints and MEP distribution systems are calculated to determine loads and size connections, structural framing elements, ductwork and piping.

In some cases, architects may have to give up designed areas to include MEP components. At this point, the design layout would have to be modified while maintaining the building's engineering systems. The use of coordinated 3d models allows MEP integration in the construction plans at an early stage. Therefore, a 3d model-based workflow became a viable option. Models designed with CAD have certain advantages in the MEP design sector, such as the following:

MEP design typically involves a significant number of stakeholders responsible for the smooth execution of different stages of building engineering. These stages generally include planning, designing, spatial coordination, fabrication, installation and maintenance. Teams involved in building services design usually consist of design engineers (also known as the consultant engineers or building designers) and MEP contractors. Sometimes, a fabricator, who creates ducts, pipes, electric ladders or sprinklers with frame modules, can also be involved in the design process. The design engineer traditionally worked with the architect to oversee lighting, cooling, heating, drainage, waste, fire prevention and protection services. In this case, the design engineer steers clear of the detailed spatial design of the lighting, cooling, heating, etc. It was the MEP contractor, or trade contractor, who would execute the spatial design requirements and installation. The MEP contractor must then develop the consultant design into an installation-ready building services solution.

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