Model-based, digital and interdisciplinary - these are just a few keywords describing the way Building Information Modelling (BIM) works. BIM is the future topic of the industry and is becoming more and more decisive in the everyday work of all those involved in construction.
By Birgit Kaiser, Dipl.-Ing. FH, CANZLER GmbH
With BIM, the building is mapped in a parameterised model that integrates all disciplines right from the start of the planning process. The 3D planning is linked with additional data on component properties, costs and deadlines in the further planning process - a virtual building model is created which represents the planned actual state of the building and thus depicts reality in simulations.
BIM in building construction, technical building equipment and facility management
At Canzler, BIM has long been in focus in the planning of buildings, technical building equipment and facility management. The use of 3D models in planning, as one of the basic components of BIM, has been part of our work for years. In addition to investing in staff training and the corresponding software and hardware upgrades, the implementation of BIM also required the work processes to be adapted to the planning structure. Since then Canzler has also been working in superordinate committees on the integration of BIM as a planning tool.
Project example Terminal 3
With the new construction of Terminal 3 of Fraport AG Canzler is currently working on one of the biggest projects in BIM. In this project Canzler is responsible for the planning of the sanitary, heating and ventilation systems for the new terminal main building and for the planning of the building automation for the entire new building. In addition to the planning tasks Canzler is also responsible for the coordinated and collision-free 3D planning between structural engineering and route-bound trades (sanitary, heating/cooling/AHU/electrical engineering) in the main building.
Benefits and challenges
The choice of the BIM working method offers advantages in particular through the rapid exchange of plans and comments and automatic collision detection. Large data packages such as air volumes, plant IDs etc. can be transferred to the drawings by lists. The central database ensures that multiple entries are avoided, data updating is simplified and new or deleted objects can be found more quickly. Data evaluation in the selected planning environment can also be carried out more quickly and automatic mass extracts can be generated. Within the project a continuous data acquisition and evaluation can be carried out, which can be used for the forecast of the later construction and life cycle costs. This enables a cost certainty for the later operation.
BIM as a working method has become an integral part of the construction industry. However, its effective use requires an update of exchange processes between all those involved in planning and also further standardisation of interfaces and communication processes. The project also highlights current problems in the implementation of BIM. These lie in the strong dependence on software interfaces, which still have potential for development and standardisation. It should also be noted when using calculation programs that the programs usually do not work in the live model. This leads to the maintenance of several models and the replay of results into the live model may no longer be possible after updating.
Further development of BIM in working groups
Therefore Canzler is a member of the DIN working group NA 005-01-39-03 AK "Information Management with BIM" to actively participate in the further development of communication processes. DIN EN ISO 19650-1 as well as -2 are already available as draft versions, which deal with the management of information, including exchange, recording, version identification and organisation.
Canzler is also an active member of the working group BIM of Real FM e.V. The working group deals with the topic BIM from the operator's and user's point of view and offers practical support in the form of the provision of important basic knowledge as well as recommendations for action for planning and construction accompanying FM of the future. The guideline "BIM methodology from the operator and user perspective 2018" was published in December 2018.