ΒΙΜ of Gewa Tower in Germany
Building Information Model of SLT 107 Schwabenlandtower, or former Gewa Tower and hotel was completed after detailing scanning of all areas of interest. In a period of 26 working days, tower and hotel floors were scanned with state-of-art laser scanners such Leica RTC360 and Leica P40. A local geodetic network was established. The final point clouds were filtered and further registered inside Leica Cyclone. The unified point clouds of each floor were aligned to the desired coordinate systems (project and German coordinate system). Inside Autodesk Revit 2019 was designed and prepared the final building information model which geometrically and parametrically describes the current building infrastructure.
A few words about SLT 107 Schwabenlandtower
SLT 107 Schwabenlandtower, or former Gewa Tower is a new erected multi-storey building located on the Stuttgart suburb of Fellbach. It is the fourth-highest residential building in Germany and the tallest in Rems-Murr district (indicatively: Colonia House -155 m- Cologne, Henninger Tower -140 m- Cologne, University Centre -133 m- Cologne). The initial design included 34 storeys, with 192 exclusive apartments in an area of 15.909 m2 and a business hotel with approximate area of 5.088 m2. For the hotel, it was planned to offer 164 rooms, conference and breakfast rooms, bar, lobby area and car parking on the underground floor (Picture 1,2).
The current naming “SLT 107 Schwabenlandtower” stands for the final height of the building complex. The former name Gewa is also the acronym of the contractor Michael Georg Warbanoff. Because of its distinct architecture and positioning, it is considered to be a local architectural landmark and will act, from an urban planning point of view, as a central point, close to many industrial buildings and connection roads to Stuttgart center.
The methodological framework of field measurements had been prepared and planned before any measurement activity. The essence of the final approach was the achievement of a final dataset where its integrity, adequacy and accuracy would support the further modelling and BIM procedures.
Because of the building extents, the complexity of surfaces and the large number of details (structural, mechanical) that had to be surveyed, laser scanning was the only option amongst other surveying techniques for the massive collection of the necessary dataset. All data were aligned to specified coordinate systems and more specifically to the building local coordinate system and on the German reference system for cadastral, urban planning, national services and real estate reasons.
Fieldwork was conducted over a total of 26 working days in a period of time between February and May 2019.
Beside photographs that were collected from SLT 107 Schwabenlandtower, documents and drawings that expected to help the process of Building Information Modeling were asked and provided. More analytically, there were given:
- Architectural drawings for Tower and the Hotel (from floor 4 to the top)
- Construction drawings for the Tower and Hotel (in pdf and dwg format)
- Documents concerning the geotechnical and stress analysis
- Nomenclature of the project
Generally, after discussion with the customer, there were not found and sent part lists and invoices which would help during the modelling of structural and mechanical elements.
After field measurements, scan data were registered into one unified database using Leica Cyclone Register and Register 360 software. Each scan data was filtered of noise and irrelevant objects. Modelling process took place in Autodesk Revit software, using Leica Cloudworx plugin. Load bearing walls, drywalls, windows, stairs, railings and mechanical equipment were modelled.