international association for shell and spatial structures

Collective Members

Below is a listing of Collective Members' Business Cards. These IASS Collective Members have elected to post their business cards on this site to indicate that they support the goals and activities of the IASS through their annual membership, and that they extend the benefits of membership to their staff and organization (as described in the Membership page of this site). 

Here is also a link to a page for IASS members only (requires login) with the Directory of all active Collective Members that links the organization name to the name of the Collective Representative. Members may access this page by selecting Directory of Collective Members.

Collective Members' Business Cards

This portion of the site is still under construction.  Current or new Collective Members wishing to add their "business card" to this directory may do so by providing the necessary information in the profile of the Collective Representative (Log in, choose MEMBER TOOLS, select "View profile" and then "Edit profile.")

Centro de Estudios y Experimentación
 de Obras Públicas (CEDEX)

CEDEX is an Autonomous Public Agency, dependent upon the Ministry of Transport (Ministerio de Fomento) and Ministry of Environment of Spain, providing research, testing and high level technical assistancein the field of transport, public works and environment. The Laboratorio Central de Estructuras y Materiales of CEDEX currently hosts the Secretariat of the IASS.

Madrid, Spain

Skidmore, Owings & Merrill LLP

SOM is one of the leading architecture, interior design, engineering, and urban-planning firms in the world, with a reputation for design excellence and a portfolio that includes some of the most important architectural accomplishments of the 20th and 21st centuries. Since its inception, SOM has been a leader in the research and development of specialized technologies, new processes and innovative ideas, many of which have had a palpable and lasting impact on the design profession and the physical environment.

Chicago, Illinois, USA with offices in New York, San Francisco, Los Angeles, Washington DC, London, Hong Kong, Shanghai and Abu Dhabi


Bollinger+Grohmann are engineers driven by passion for high-quality architecture and innovative solutions. They develop tailored solutions together with architects and clients, construction companies and industry.

Frankfurt am Main, Germany with offices in Berlin, Munich, Stuttgart, Düsseldorf, Vienna, Budapest, Paris, Brussels, Oslo, Rome, Milan and Melbourne


Since 1977, LANIK has offered turnkey solutions for covering, facades and retractable roof structures (design, manufacture and assembly) using space-frame systems, single-layer bolted systems, timber and mechanisms.

San Sebastian, Spain

Summum Engineering

Summum Engineering is a structural design, engineering and optimization consultancy. Summum specializes in the parametric modelling, finite element modelling and structural analysis of lightweight structures, natural construction materials, complex geometries and sustainable buildings.

Rotterdam, The Netherlands

COWI UK Limited

Owned by Danish parent, COWI A/S, COWI UK Limited is an amalgamation of Flint & Neill and Donaldson Associates. The UK business focuses on bridge, tunnel and marine structures. It also has an international reputation for work with masts and towers, and has participated in the IASS Working Group on Masts & Towers since its inception.

London, Glasgow, Uttoxeter, Derby, York, Bristol, Hong Kong


Ramboll is a world leading engineering and architectural company. Within structures, Ramboll designs bridges, tunnels, high rise buildings, wind turbines, towers, transmission lines, etc. A key area is masts and towers where Ramboll has designed more than 150,000 structures worldwide. Ever since the inception of the IASS WG 4 for Masts and Towers, Ramboll has been part of the management of the Group.

Copenhagen plus more than 300 offices around the world

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