A major hotel chain were looking to extend their site occupancy with the addition of 2 extra floors on the roof of their site at London Bankside.
The roof area was almost completely occupied with plant machinery and general MEP infrastructure. An accurate model of the layout of these structures was required in order to plan the layout of the foundation structures for the additional floors.
The site was particularly challenging as access to some areas was extremely limited and the MEP infrastructure occupied almost all areas of the roof. For this reason remote 3D Laser Scanning methods were used to capture areas that were not physically accessible.
After carrying out a LIDAR scan of the entire roof area, a highly detailed LOD3 Revit model was produced of all existing MEP structures including pipe and cabling covering everything above 50mm. As well as identifying areas of useable vacant space for foundation works, the 3D Laser Scanning provided dense coloured point cloud data and 360 degree panoramic images, which were extremely useful for the designers, allowing remote ‘access’ to the site. This provided clear digital visualisation of the existing plant areas and the ability to extract measurements easily.
An additional advantage of our scan to BIM survey strategy also allowed for easy extraction of schedules and quantities of existing equipment, which was valuable for the contractors, designers, and facility managers. In this example, Revit was used to store and digitally display all the existing asset information.
• Laser (LIDAR) scanning
• Existing roof structure modelled in LOD3
• All existing MEP infrastructure modelledin LOD3
• Online hosting of data and panoramic imagery
360 Group surveyed the building using the latest 3D laser scan (LIDAR) technology to produce 3D geometric images, known as point clouds with an accuracy of a few millimetres. After surveying was completed, the individual scans were processed to produce a single linked model of the whole building.
The point cloud was then exported to Revit, within which we modelled the entire roof structure and all MEP detail solely from the point cloud, before adding to the model data parameters tailored to client’s needs.
The resultant LOD3 model was made available to the client via an online viewer alongside hosted panoramic imagery allowing for effective and accurate design of additional structures along with truly accessible collaborative remote working.