Restoration of Storkyrkan in Stockholm
Storkyrkan, located in Stockholm's exclusive Gamla Stan district, is the capital's oldest church with a history that stretches back to the year 1306. So important to Sweden's heritage is this 14th century church where extensive changes have been made over time to the original architecturally ambitious baroque design. Before the work to restore the Storkyrkan to its original exterior, it was important to choose market-leading high-quality scaffolding with temporary access solutions that make it possible to carry out the renovation work in the easiest way. As experts in the field, HAKI was ready to meet this specific technical challenge.
HAKI uses its BIM tool
In this project, the entire facade, roof, tower and spire of the church will be renovated. Over time, the Great Church's symbolic copper roof and facade have been exposed to Sweden's harsh and changing weather.
To ensure that the renovation work can be completed on time and within budget without jeopardizing safety, HAKI collaborates with its client Sydställning, who are specialists in scaffolding, to deliver quality-assured access solutions. HAKI, a technology pioneer in the scaffolding industry, uses its BIM tool to produce a 360-degree overview of the complex structure. The BIM tool helps HAKI produce a virtual model of the Storkyrkan's exterior, so that the engineers can construct a lifelike scaffolding model of the object. This also enables 95% accuracy in the delivery of scaffolding materials.
The data is stored in the cloud
HAKI's designers use a cloud system to produce raw data from the 3D scan of the Storkyrkan. Because the data is stored in the cloud, it can be easily retrieved and entered into HAKI BIM, a plug-in function for Autodesk Revit, which gives designers a scalable overall view of the building and its construction.
The precision and level of detail that the 3D BIM model offers makes scaffolding construction and installation much easier and safer for Sydställning's scaffolding installers. The age and enormous size of the church, not to mention its complicated, uneven details on the facade, meant that it would be difficult to achieve the desired result without the BIM model's underpinnings. Another challenge is the location of the Great Church. It is located in the middle of a busy metropolis with typically narrow, medieval alleyways that would make it almost impossible to assemble scaffolding in the traditional way within the preferred schedule. The 3D model of the Storkyrkan's scaffold construction will thus contribute both in terms of time and quality to the installation.
- Sebastian Moa, VDC Engineer HAKI
HAKI Universal och HAKI 750 solutions
In addition to HAKI's technology, the project will use HAKI's Universal system where a safe fast and good solution will be set up around the church building, and the roof system HAKI 750 will protect the tower.
It will be a small roof system, but given the height of the Great Church, we needed to find a solution that could withstand the wind and snow in the coming months. Both HAKI Universal and roof system 750 are versatile and flexible, and can be quickly adapted to a building structure that is not straight. The HAKI Universal solution has a hooking method with a minimal number of components, which means that even the most complex buildings can have a simple scaffold construction.
– Sebastian Moa, VDC Engineer HAKI
Renovation of the Great Church's tower
When the renovation work on the south side of the church is complete, the next project phase will be the Great Church's tower. This is where HAKI's roof system 750 will really come into its own and is expected to be in place for eight months from the start of work in December 2020. Sydställen and HAKI will regularly maintain and monitor the solution, so that the intended function lasts throughout the project. Temporary installations normally have a lifespan of two years, but impressively a system like HAKI's 750 has an expected lifespan of five years, creating a safe environment for the project's renovation team.
This project is an important milestone for HAKI, whose high-quality scaffolding solutions and use of market-leading BIM technology will ensure that the Great Church's painstaking renovation can be carried out with total safety and efficiency, so that a much-admired cultural symbol can be restored to its original glory.
