BIM Project Participants
BIM Project Participants
Generally, the BIM method is only associated with the planning phase. However, utilising the BIM method for all of the participants involved in a construction project is enormously beneficial.
General contractor/project developer
A vehicle that costs 50% more and is delivered far later than agreed? Nobody wants this. Buyers expect a product with a reliable price and delivery. General contractors share the same standards. They require structures completed on schedule and within the budget. BIM provides an integrated foundation that centrally saves, updates and coordinates the quantities, costs and times. All of the information is contained in the database, linked and can be filtered, sorted and calculated in any desired manner. As a result, BIM represents the ideal method for allowing general contractors to transparently monitor costs and schedules with a minimum of work.
Building information modeling provides architects with exceptional freedom during the drafting phase. It enables architects to give every idea a form because the BIM system enables the generation and parallel development of alternatives. BIM systems such as Revit Architecture generate the plans, views and cross sections easily and automatically at the press of a button and with different scales, regardless of how unusual the building geometry is. In addition, planners can also check the functionality of the building. Using BIM, the project-specific conditions can also be monitored in order to determine the optimum building design. This can also be carried out in collaboration with all of the partners involved in the project. The architect can present multiple alternative drafts to the client, hide and display the individual options and also explain their effects by means of the quality and cost analyses available with Revit Architecture and the CADSTUDIO ParameterTool from the start of the very first digital draft. A smoothly running construction project is highly dependent on the perfect coordination of the individual work areas. Construction can only be completed on schedule and within the budget if all of the components match as planned. Building information modelling creates a digital representation of the building that integrates all of the areas: work, formwork and reinforcing along with technical building equipment (MEP) planning are all based on the same data model. All of these aspects are linked together and directly coordinated. Changes to one area such as the supporting structure or building services have an immediate effect on all of the other aspects.
Civil engineers build directly on the architect’s data in the BIM model. The execution planning takes place simultaneously with the development of the formwork and reinforcing. Given that, optimally, civil engineers using Revit can draw on the same parametric building modelling environment as the architect, this eliminates the time-consuming re-entry of the project data. Civil engineers immediately have access to a correct and current dataset for their work. They can use the edges of the BIM building model to directly derive the required formwork and reinforcing. This almost entirely eliminates alignment errors between the building geometry, the formwork and reinforcing. Furthermore, any subsequent changes to the architectural planning are simply updated.
Building services technicians
Due to the fact that the building services technicians utilise the same information as the civil engineers and architects, the mechanical, electrical, and plumbing equipment (MEP) planning is also integrated into the virtual building. This functions without any interfaces, as the TBE planning is also integrated into Revit. Collision checks between architecture-specific, load-bearing and technical elements help to prevent unpleasant surprises on the construction site as the wiring and the building structure, for example, are coordinated with each other. The piping layout of the building can also be optimised and installed in the minimum necessary space. The building services elements not only include the geometrical data but also the characteristics and attributes. The use of MEP shaped parts and fittings from the CADSTUDIO Revit projectBox mep also enables calculations such as heating or cooling load to be carried out in external solutions. The calculation results are then integrated into the BIM model. In addition, the shaped part and fitting information can also be utilised for quantity calculations in accordance with the German Construction Tendering and Contract Regulations (VOB). These can then be used in RIB ITWO 5D to create the specifications, for example.
The problems and schedule delays that plague conventional planning as a result of inadequate coordination can be avoided with the BIM. This applies to the construction site logistics, for example: When will a part be delivered? When can it be installed? This information can be linked directly to the components and analysed specifically using analysis tools. As a consequence, it is possible to determine in advance whether the installation can be carried out, enabling the construction process to continue without any delays. Furthermore, BIM also helps to plan the construction site equipment down to the last detail: Locations for placing excavated earth, whose volume is automatically generated by civil engineering software such as AutoCAD Civil 3D, or parking areas for construction site vehicles and cranes can be virtually assigned. Movement analyses ensure that the cranes and their crane arms can reach every area of the construction site without colliding with other building elements. As a result, BIM truly helps to design collision-free construction in every respect.
Quantity data as well as room and component information can be transferred directly from the BIM to tender, allocation and billing. One option is to use Autodesk Revit + CADSTUDIO ParameterTool in combination with RIB ITWO 5D. The BIM model enables the calculation of the quantities and masses in accordance with the German Construction Tendering and Contract Regulations (VOB). Listed by trade and item and expanded with the precise service description, the cost estimate is transferred directly to the tender and contract allocation and thus to the actual prices. When using the BIM method, changes to the model update the data.