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Case Studies

HafenCity, Brooktorkai

Sectors: Structural, Architectural
Applications: Structural Connections

Summary: The Hollo-Bolt® was used as a SHS connection, allowing the glass facade and roof to be constructed with a uninterrupted design, as the fixings were not visible.

The revolutionary Hollo-Bolt Flush Fit, creates immense opportunity for architectural design as the unique fixing is concealed within the steelwork with no protruding bolt head or nut.

HafenCity, Hamburg is currently Europe’s largest inner city development, a purpose-built district spanning an area of 1.5 million m² and scheduled for completion by 2025. Developer Quantum Immobilien AG and architect GMP (Gerkan, Marg und Partner) created an architectural design that complements the existing environment and unites tradition with innovation by using clinker-brick facades as a reference to nearby historic buildings, while incorporating clean, modern lines of large glass enclosed open spaces. The prominent glazed feature of the Germanischer Lloyd building guarantees expansive views over the old warehouse district and creates a striking entrance to the company’s new head office.

The M12 Hollo-Bolt Flush Fit was used to construct the glazing support frame, securing the wide spanning glass roof and multi-storey windowed front. The connection design included splice joints inside the adjoining pre-drilled SHS sections, allowing the fixings to be simply inserted and tightened with a torque wrench for a rapid installation. The cost effective solution required no specialist equipment or labour and dramatically less work at height in comparison to traditional welding or through-bolting methods. The Hollo-Bolt heads were then painted the same colour as the steelwork, making the connection virtually invisible. Resulting in that the steelwork is not only structurally sound, but aesthetically pleasing, presenting a clean symmetrical appearance.

Click here for more information about the Hollo-Bolt and its range of architectural styles.