76 Southbank is the considered transformation of a Grade II listed icon. Created by eminent British Architect, Sir Denys Lasdun, 76 Southbank is one of the world’s finest examples of Brutalism design. It sits alongside his other masterpiece, The National Theatre, in what has become one of London’s most creative and cultural districts.

The project involved partial demolition and re-purposing of elements of the existing structure, creating 300,000 sqft of river office space, retaining 80% of the existing structure, achieving net zero carbon development in both construction and operation.

The Wentworth team collaborated closely with Keltbray to detail the structural steelwork, including designing steel-to-steel connections and providing comprehensive fabrication details. Through coordination and innovative engineering structural capacity was ensured without compromising architectural requirements.

The design scope included 3D models generated in Tekla Structures, general arrangement drawings for approval based on an IFC model exported from the master Revit model, typical detail drawings for approval, and fabrication packages including all assembly and single-part drawings, material reports, and NC files. Particular requirements included:

• Remedials: Wentworth was tasked with resolving several remedial issues, including the hanging column at Level 02, which was 30mm out of plumb. While structurally sound, the architect requested a remedial solution. We proposed a welded plate-to-plate splice, addressing challenges from the shifted position.
  
• Level 3 Hanging Steel: The model was based on the client's IFC and adapted to fit existing concrete elements. Wentworth collaborated with Keltbray to adjust the steel-to-concrete connections and resolve alignment issues with minimal delays. This process highlighted the importance of thorough survey verification for accurate setting-out.