was founded in 2004 by IPL team members. formTL took over the ongoing projects, the project rights and IPL Ingenieurplanung GmbH archives. Since then the company has grown steadily from a staff of 10 to 20 employees. 2009 formTL was certified according to the quality standard „Planer am Bau“ in 2009 and moved into its new offices in the former Schiesser boiler house in Radolfzell in 2012.


is to offer you an optimal consultancy service and to bring together the right team of specialists to find the solutions. Our customers come to us because we can see the whole picture: we are creative, work on short timelines and provide a skilled, proficient service for a reasonable fee. Calculating and engineering is what we enjoy, and we aim for the clarity of simple functional details and logical structures.


structural engineers and architects with an integrated approach to form, function, sustainability and planning quality. We offer a consultancy service, design, optimise, calculate and deliver feasibility studies and tenders for your investment insurance.

Others may stop but formTL keeps going: we are still at your side to offer support after the approval planning and detailed design phase. Our expert site management controls costs and ensures quality and timelines. We draw up assembly plans, workshop drawings and provide cutting patterns ready for the cutter with all the necessary data for purchasing, production and assembly.

Susanne Beck

Stefan Fessel


Carmen Seitner

Gerhard Fessler

Carmen Seitner

Michael Guidorzi

David Günther

Sven Haag

Ibrahim el Hayek

Rémi Journo

Carmen Seitner

Sergio Leiva

Fridolin Mall

Carmen Seitner

Hassan Nawaz

Manuel Neidhardt

Karin Preuss

Michael Schäffer

Gerd Schmid

Carmen Seitner

Carmen Seitner

Bernd Stimpfle

André Teixeira

Kathrin Tölzel

Jürgen Trenkle

Ciprian Tripon

Henrik Vincon

Christian Würfl

Christian Würfl


Pre-tensioned membranes, cables and foils are some of the lightest and yet most high-performance materials, and these properties contribute to sensible and careful use of resources. The essence of this type of building is a significant level of pre-fabrication, short building times as well as optimised manufacturing and transport costs.
Our structures are optimised using wind assessment and CFD analyses.


Our long experience in international exhibition construction means that we are not only familiar with the exhibition halls but also have our contacts in Detroit, Paris, Frankfurt, Geneva, Beijing, Shanghai, Brussels, Istanbul, Las Vegas, Moscow, Tokyo, Stuttgart and Munich. These contacts play a significant role in accelerating decision-making and in the process of coordination, and ensure planning safety from the design phase on. The Liebherr exhibition stand, built for the third time in 2016, as well as the Mercedes-Benz exhibition stand at the IAA in Frankfurt are examples of highlights in this field.


is a particular challenge; a challenge formTL is happy to take on. This is how the Reichstagsverhüllung (Wrapped Reichstag) with Christo and Jeanne-Claude was created in 1995, the Modern Teahouse by Kengo Kuma in 2007, the Tubaloon by Snøhetta in 2006 and, in conjunction with the Performing Arts Academy, the Lichtwolke (Cloud of Light) pavilion at Raumwelten (Spatial Worlds) in Ludwigsburg.


We have developed our own software for form finding and patterning membrane structures. The software’s data output can be adapted to the project or the customer’s cutting plotter. We use Autodesk Inventor, Rhino/Grasshopper and Revit for parametric engineering design.
AutoCAD, RSTAB/RFEM, Easy, 3ds MAX, OpenFOAM (Computational fluid dynamics) complement our range of tools.


(Building Information Modeling)
We design using Autocad, Autodesk Inventor and Revit.
Our 3D-models are BIM-compatible and can be used by our planning partners for communication, review and further processing.


committed employees who are able to work in different project groups and are interested in carrying out remarkable projects in a positive working environment.

You are looking for a job offering good conditions of employment and with friendly colleagues.

Then, send us your application. We might make a great team.


We are TÜV Rheinland certified in compliance with the quality standard “Planer am Bau” (quality management system for architects and engineers

In order to achieve our aim of continuous improvement, the “Planer am Bau” working group at formTL optimises internal work processes.

certified by
TÜV Rheinland
Certipedia-ID 0000021410

formTL is a partner of Tensinet in Brussels, a network of engineering offices and companies with a main focus on membrane structures. Bernd Stimpfle, our managing director and consulting engineer, is Chairman of Tensinet. He is involved with work on uniform European quality and measurement standards for wide-span membrane and foil structures.

Also this year we received the seal of the Stifterverband for our research activities.


2014 - 2021

reddot winner 2021 for PERI’s presence at bauma 2019 Munich

On the occasion of the Verzinkerpreis 2021 formTL was awarded a recognition in the category metal design for the project “Kreuzweg # LOVEEUROPE” by Mia Florentine Weiss.

„Vorbildliche Bauten NRW 2020“ Award for the Textilakademie NRW, Mönchengladbach

Ingenieurpreis des deutschen Stahlbaues (German Steel Construction Award) for the Volkswagen customer centre exit in the Wolfsburg Autostadt.

German Design Award: Prize for Aarau Bus Station roof and design of forecourt in (Switzerland).

Hugo Häring Award 2014 for the exterior area of the Palais Thermal Bad Wildbad

Icon Award: Prize for Aarau Bus Station roof (Switzerland

WAN Award: Prize for Aarau Bus Station roof (Switzerland)

Award für Marketing + Architektur: Team prize for Aarau Station forecourt and Bus Station (Switzerland)

2x Finalist at Architizer A+Awards: Aarau Bus station

2004 - 2013

Adam Award Gold for Mercedes-Benz A-Class Pavilion and Roadshow 2013

Adam Award Gold for Mercedes-Benz exhibition stand at the IAA 2011

ADC: 2x Gold and 2x Silver for Mercedes-Benz exhibition stand at the IAA 2011

reddot design award winner: Liebherr exhibition stand bauma 2010

ICE Award for National Tennis Centre’s “temporary sports canopy“ in London

BDA-Prize Hamburg, 1st place and RIBA-Award for Unilever-Headquarters /Hamburg

ADAM silver award for Liebherr exhibition stand at bauma/Munich 2010

ADAM bronze award for Mercedes Benz exhibition stand at the IAA, Frankfurt/Main 2009

WAF award for Unilever Headquarters in Hamburg

Zénith de Strasbourg nominated for Mies van der Rohe Prizert

Zénith de Strasbourg awarded (gold) Medaglia d’Oro all’Architettura Italiana

Architectural Digest selects Modern Teahouse Frankfurt as a project with style

AR award for emerging architecture for Vienna-Schwechat Air Traffic Control Centre

European Steel Design for Vienna-Schwechat Air Traffic Control Centre

1st place with Vielmo Architekten for Hamburg Barmbek Station

ADAM Award 2004: 1st place for Mercedes-Benz exhibition stand at the IAA in Frankfurt

Great Place to Work® Certified

“We are really pleased to receive such a good rating from our employees in an anonymous survey,” says Bernd Stimpfle. “What is more, the certification provides us with valuable impetus to keep on making progress as an employer”.

The “Great Place to Work® Certified” accreditation programme run by the International Research and Consultancy Institute stands for a special commitment to shaping workplace culture and is awarded according to a proven procedure.

The programme comprises independent, anonymous feedback from employees and analysis of human resources measures and programmes.

“Good employers have one thing in common,” says Sebastian Diefenbach, Head of Customer Support at Great Place to Work®, “they are committed to credible, fair management and active employee development. Respect, trust and team spirit are an integral part of the corporate culture.