National Assembly for Wales

  • An open and inviting public space also provides secure private areas for members.
  • Horizontal planes of the design define and embody the concepts behind the assembly.
  • Sustainable design includes finishes that will last for 120 years.

Overlooking Cardiff Bay and the Bristol Channel, the National Assembly for Wales building embraces the desire for open and transparent government. Arup provided structural, civil, transportation, facade, geotechnical, wind and lift consultancy to this unique project.

The assembly building was designed to be an open and inviting public space, as well as providing accommodation and secure private areas for members of the new assembly, or Sennedd. Two of its three levels are open to the public, with a café and galleries overlooking three committee rooms and the concentric debating chamber of the 60 Assembly Members.

The building's striking sculpted roof was inspired by the natural flow of forces within a folding plate structure. By refining its unique and complex geometry, it was fabricated and constructed simply, without compromising the unusual design.

The assembly building also exemplifies sustainable design, incorporating durable finishes that will last throughout its 120-year design life. Arup's work was innovative, pragmatic and cost-effective. It included single-glazed blast-resistant facades, an exposed in situ reinforced concrete frame and slate walling and paving, constructed from the plentiful source of the North Wales roof slate industry.

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  • Horizontal planes of the design define and embody the concepts behind the assembly.

  • Open gallery

    Two of its three levels are open to the public with a café and galleries.