Structural steel as-built documentation, halls A to E, Divišov

Five halls in a single row, roughly 320 metres end to end, and a brief to record the steel frame accurately enough for a structural assessment to be built on it. For CTP Invest we documented halls A to E in Divišov. The deliverable centres on a schedule of 347 columns with sections and lengths, fifteen drawings and a Revit model of the frame.

The site near Divišov consists of five halls built in one row and lettered A to E. The overall dimension on the floor plan puts the complex at roughly 320 metres along its length. The owner was preparing a structural assessment of the steel frame and needed as-built documentation to base it on. The brief came down to two things. Survey the roof trusses, and establish the thickness of the trapezoidal roof sheeting so its load capacity could be checked.

Three capture methods were combined. A static laser scanner covered the interiors, and the registration reports from late September 2025 record 29 scan positions across two clusters. The exterior was walked with a mobile SLAM scanner, with a lifting platform needed to reach the upper parts of the elevations. A drone photographed the roofs, producing a separate dense point cloud. All three inputs were registered into a single dataset, and only then was the load-bearing frame modelled element by element in Revit.

The January 2026 set comprises fifteen drawings plus a list of appendices, together with the Revit model and an IFC export. Its core is the column schedule. It lists 347 columns, 313 of them steel and 34 reinforced concrete, under fifteen type marks and across 103 length positions, so both the section and the length can be read off for any column on the plan. Sections through every hall, roof plans, a sheet with 21 bracing details and a laying plan for the trapezoidal sheeting complete the package. The structural engineer therefore received a usable element schedule rather than an outline. The documentation is issued as a building survey and not as construction design. It states plainly that the foundations were not investigated and that no probes were made into the structures.

Project challenges

Five halls do not mean the same building five times. Halls A, B and C sit on a main grid of about 10.9 metres, while D and E are a different structural system with their own grid and their own sections. In halls D and E the main columns also change section over their height, a hollow section at the bottom and a rolled beam above. Left out of the schedule, that detail would put any calculation on the wrong section, which is why it appears as a separate note on the drawings. The second issue was the limit of what can be measured at all. Part of the roof structure in hall E is concealed above a fit-out and could not be reached. That is written directly onto the roof drawing, because for a structural engineer the line between recorded and unrecorded matters more than a tidily completed plan.

Project outputs

• Overall floor plan with column type marks and a legend of sections
• Column length plan, a schedule of 347 columns across 103 length positions
• Roof plans of all five halls
• Six section sheets through halls A, B, C, D and E, longitudinal and cross
• Bracing detail sheet covering 21 positions
• Laying plan for the trapezoidal roof sheeting
• List of appendices, fifteen drawings in PDF and DWG
• Revit model of the steel frame and an IFC export
• Point clouds from the interiors, the exterior and the drone survey
• Photographic record from site
• Column plumb check comparing the element axis against the point cloud