25 years Femto Engineering | first project - Femto Engineering - Femto Engineering

25 years Femto Engineering | first project

In this previous article, we've shown you our very first newsletter and explained a little bit about the first project Femto Engineering has worked on: the St. Jansbrug.

In honour of the 50th anniversary of St Jansbrug student association, a pedestrian bridge was built. The bridge is designed in such way that the railings take all the loads of the bridge and lead them to the foundation. It will be one of the few applications of a challenging supporting structure. The biggest challenge for the design team was to use materials as efficiently as possible. Femto Engineering has contributed to this.

Model and results

The model is constructed from beam elements. They are imposed on the sides. The calculations were not only to optimize the model but also to demonstrate that the bridge meets the strength requirements. The figure below shows the failure behaviour of the final bridge if too many people would stand on one side. Due to the asymmetrical nature of the load, it was necessary to model the entire bridge instead of half of it.

The results derrived by Femto Engineering met the requirements, which made it possible to get the bridge approved by the building inspection of Delft.

origin of assignment

Nostalgia was the basis for an almost impossible plan. A Sint Jansbridge for the Sint Jansbrug, just like when the society was founded. At the time, Sint Jansbrug was located in the Engelenbak, a hundred metres away from the current premises on the Oude Delft. Relocating the monumental bridge from 1773 was not an option. A new construction, however, was. The idea of building a new temporary bridge originated as a joke. Later, the plans became more concrete. The association proved enthusiastic, as did the Department of Public Works, which was prepared to cooperate. A team of designers was put together from Jansbrug members and eventually the final design was chosen unanimously. Read more about the origin of this assignment through this link (NL).

source: TU Delta

Recent placement

These days, the St Jansbrug bridge isn’t placed on the Oude Delft anymore but stands at Knus in Delft. Knus is a restaurant, located in the Delftse Hout surrounded with water and nature.


Teaming up with Femto Engineering means you can count on engineers that think along, involve your employees and give solid and practical design assessments.

read more


Femto Engineering is Smart Expert Partner of Siemens Digital Industries Software. We’re expert users, here to help you to get the most out of the software.

read more

Training & Support

Femto can help you get the most out of your software with a lifetime of learning with professional training and support

read more


Through CAE research and openly sharing our knowledge and experience, Femto Engineering supports her clients to get the most out of FEA and CFD.

read more

March 28, 2022
get in touch

Do you need more information or want to discuss your project? Reach out to us anytime and we’ll happily answer your questions.

about us

At Femto Engineering we help companies achieve their innovation ambitions with engineering consultancy, software, and R&D.
We are Siemens DISW Expert Partner for Simcenter Femap, Simcenter 3D, Simcenter Amesim, Simcenter STAR-CCM+ and SDC verifier. Get in touch and let us make CAE work for you.

Privacy policy


Be ahead in FEA & CFD

Sign up for our newsletter to get free resources, news and updates monthly in your inbox. Share in our expertise!