The use of Building Information Modeling can transform the dimensions of building structures. The Manskun Rasti construction site in Helsinki, Finland showcases the future of construction. Skanska has taken the building information modelling process to a new dimension by boldly putting the limits and possibilities of Building Information Modeling (BIM) to the test. Manskun Rasti is the winner of the Tekla Global BIM Awards 2011 competition in the Building Information Modeling category. According to the jury, utilisation of building information modeling has been groundbreaking in the project. Background Skanska has built a complex of four office buildings just three km from the Helsinki city centre. The company completed the first eight-floor tower, the headquarters of Skanska Finland, in 2012. The total scope of the project encompasses 33,000 floor sq meters, and the second tower is also completed within the same year. A three-story parking garage is located underneath the office floors. As Skanska is both the client and the main contractor in the project, it has had a great opportunity to implement the project exactly according to its own wishes. Skanska has previously utilised the information model based construction in its residential building projects, but this is the company's first office building project where the limits of building information modeling have truly been put to the test. The basics As the client, Skanska required all designer parties to create their plans through modeling, starting from the geotechnical model. For production, a refined information model (called the production model at Skanska) was produced from the designers' models. This model is based on a structural model created with Tekla structures, which includes cast-in place structures with their reinforcements, detailed precast units and steel frame. The architectural and building systems models have been integrated to the Tekla model in the IFC format. The geotechnical model includes existing pipes, wires and tunnels as well as the required excavations and future underground public utilities. The initial geotechnical model also includes the laser-scanned existing ground surface. The architectural and building engineering models have been updated when needed, the structural model every two weeks. The real-time structural model has been used to monitor the progress of the design work. The project part to be built next must be fully designed before the construction is started. The designers' models were used to produce a model containing production data using Tekla Structures Construction Management software. This model has been widely used by different parties at the construction site. On site Several building information models were created for use in production, one for each construction phase. The first production model was made for the earthworks and foundation construction phase. It was used for scheduling and visualising the progress of work phase by phase from soil excavations to blasting, drilling, and foundation casting using Tekla task manager. The next phase was the construction of the underground floors. The production model contained the cast-in-place frame and the installation of precast units. The frame erection for each office tower forms a separate phase, so a separate production model was naturally created for each of these. The refined schedule for the construction phases with their section and floor divisions were imported into Tekla software from the Vico Control software. Innovation The structural components of the model were grouped using Tekla model organiser, and the grouping has been maintained throughout the project. With the help of the grouping, 4D simulations of the schedule have been made. Once a week, views of the weekly 4D-construction schedule were printed for the workers' coffee room and the information screen at the site office. Monitoring of frame erection schedules is model-based, and the actual installation date can be found for each structural component. When the building information model is available, there will also be users. Plumbers and frame foreman have used the screenshots as reference for the installation work. BIM is here to stay The building information model has arrived at the construction site to stay. Skanska has already taken the next step and ordered tablet computers for foremen so that every detail does not need to be checked at the trailer. (Communication by the management of the company)