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Aurinkokivi service center

City of Vantaa, Fira, Playa Architects, Optiplan, Engineering Office Laaturakenne, Engineering Office Sormunen & Timonen, Sweco PM, Projectus Team, Stacon, RM-Hitsaamo, Parma

Multi-functional building to represent the new city model

Built in two phases, Aurinkokivi is the most large-scale new construction in the City of Vantaa for the years to come. This multi-functional building is expected to be completed in the fall of 2016, after which 500 elementary school students can move in. In addition, the building will house a daycare center, maternity clinic, and music and art classes. BIM-based implementation follows Vantaa’s strategy to completely digitalize, information-manage, 3D-visualize and model their city. As the project owner, by implementing a BIM-based process, the City of Vantaa strived to also benefit from the model during construction. Their strategic choice was to apply BIM on a very accurate level in order to better manage construction quality, costs and schedule.

With Tekla Model Sharing functionality it was considerably easier for the participants to communicate and cooperate in the project. Above all, a shared precast concrete contract was much easier to realize compared to each agency working on their own model. For the design phase, the biggest benefits were considered to be better cooperation and easier design management, as the model illustrated how to best match the building’s geometry and its technical systems.

Both electrical and mechanical engineers thought that creating hole reservations was easier than before because they did not need to wait for plan approval from each discipline. Moreover, they were able to review routings in the model. Architectural and structural designs were also more compatible using BIM compared to a project carried out in a more traditional way.

The project’s BIM coordinators whose main task was combining the models, played an important role in making the workflow smooth. Bringing along the general and HVAC contractors enabled testing the model on-site, as they were able to make use of a composite model early on during bidding. With BIM it was easier to learn the project and the plans already during bidding. After the contractors had been selected, the composite model became immediately useful in creating general timelines. With model-based quantities it was faster to create graphic schedules with Vico Schedule Planner and the general contractor could better understand the volumes of the building blocks. Using model quantities in scheduling saved a considerable amount of time compared to more traditional design methods and enabled better design quality.

When planning the frame installation sections and order, BIM was used to illustrate the connections and the most challenging parts of the multifaceted building. Section data was added to the model unit by unit, which helped communicate their order quickly to the design group and the unit designers in particular.

Modeled sections enabled unit design schedule on a more accurate level, making it easier to monitor and review the design process. Accurate level of design also ensured that all units were created in most efficient order. This was particularly useful for project management, as unit design was on a critical path regarding the schedule.

Building information models have served as essential visualization and review tools on the construction site. The site office houses a screen that constantly displays an up-to-date composite model for all the contractors to check upon. The model has been useful for the HVAC contractors whose supervisors and employees use it to plan installation order and coordinate tasks as well as to check penetrations and routing altitudes.

Three different engineering offices carried out concrete element design in cooperation by utilizing Tekla Model Sharing technology. At best, the model was simultaneously used by structural designers, precast concrete designers, hollow-core slab designers, production planners and site management. This enabled minimizing overlapping tasks and ensured that the most up-to-date information was always available. Building information models have also been used in the infra engineering and earthmoving phases of the project. The general contractor created a rough model of both excavation levels and plot infrastructure in a very early phase of the project, which helped better perceive the practical conditions and elevations in a complex plot.

Owner: City of Vantaa
General contractor: Fira Oy
Architects: Playa Arkkitehdit Oy
Structural Design Optiplan Oy
Detailing: Engineering Office Laaturakenne Oy, Engineering Office Sormunen & Timonen Oy
HVAC design: Projectus Team Oy
Fabricators: RM-hitsaamo, Parma, and Rudus
Electrical design: Stacon Oy
BIM coordination: Sweco PM