102x
001373
2025-09-08

Passage Roofing on 3rd Floor at Westfield Černý Most in Prague, Czech Republic

Structural modifications and extensions of “Westfield Černý Most” shopping mall in Prague, Czech Republic. This part of the project deals with the 3rd floor passage roofing. As part of the structural modifications, the existing void will be largely roofed, reducing its extent to two smaller voids with an irregular oval shape. The structural solution was developed by a Dlubal customer, OBERMEYER HELIKA a.s.

About Project

The new ceiling for the existing void (open passage) will reduce the space to two smaller voids with an irregular oval shape. The main goal is to optimize the space above the passage, allowing for better utilization of the floor and the addition of new floor space. The project includes the implementation of steel trusses that connect to the existing reinforced concrete frame and steel structure.

Structural and Technical Solution

The roof is designed as a system of steel trusses placed in modified axes of the existing supporting system. The distance between the trusses is 8.1 m (26.6 ft), and their maximum span is approximately 16 m (52.5 ft). The trusses are supported on reinforced existing columns or new steel columns. To support the roof structure, additional trusses are used in the area of the new voids, lining their shape. The joists, perpendicular to the main trusses, form a support for the reinforced concrete ribbed slab. This slab is concreted into trapezoidal sheet metal, which serves as permanent formwork, using only the reinforced concrete slab with a concrete cover height of 100 mm (4 in) for the load-bearing function. The ceiling structure is laterally supported by the existing load-bearing structures to ensure the necessary spatial rigidity.

The analysis of the steel structure and design of steel elements were carried out in RFEM.

Location Prague, Municipal District of Prague 14
Czech Republic
Investor
Architect
Structural Solution of Project


Project Specifications

Model Data

Number of Nodes 619
Number of Lines 820
Number of Members 820
Total Weight 94,953 t
Dimensions (Metric) 56.820 x 44.911 x 11.582 m
Dimensions (Imperial) 186.42 x 147.35 x 38 feet
Program Version 5.33.01

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