FR Engineering
L‑SA supports construction stakeholders at every stage of a building project (residential,service,public facility,industrial), through committed, rigorous structural engineering focused on finding optimal solutions.
Bordeaux – EB4C — Concrete façade with prefabricated modules of varying height and inter-floor keying (Client: NEXITY‑COGEDIM · Architect: Cino Zucchi Architetti)
Synergies serving the project
With experience gained both in construction firms and in project management, L‑SA offers solutions tailored to the specificities of each situation, relying on a demanding practice of the Eurocodes and applicable regulations.
Listening and responsiveness guide our way of working: they enable us to integrate the ideas and constraints of all project partners—clients, architects, cost consultants, engineering firms, methods departments, site managers and foremen.
In return, we aim to communicate structural issues in an open, clear, and educational manner, to foster co‑design and high‑quality teamwork.
Saint‑Germain‑en‑Laye — Building F — Load‑bearing stone façade: staggered U‑shaped piers (integrated thresholds and lintels) (Client: iXCampus · Architect: SAME Architectes)
Tailor‑made technical designs
Whether for rehabilitation or new construction, L‑SA becomes involved early on to identify the most relevant design options with regard to the project’s various challenges: geotechnics, construction conditions, acoustics, fire safety, seismic requirements, carbon impact…
During the development phase, we detail the sizing and construction solutions that determine the project’s technical and economic performance. We work on all structural elements—from special foundations to the superstructure—addressing the specific complexities of each project.
Our tailor‑made software enhances our analyses, enabling us to propose, justify, and compare optimized solutions for the project.
Study of the effects of a concrete shrinkage gradient on deformation, stresses, and crack openings in an industrial slab (MGI software, L-SA)
Pragmatic support during construction
The construction phase often exposes projects to demanding technical issues and, at times, complex structural contingencies: site discoveries, interactions with existing structures, execution deviations, program changes…
L‑SA provides technical support to the client, architect, contractors and their engineering teams to analyze each situation and propose robust, operational solutions.
Nantes Museum of Arts — Load application by jacking (500 T) of the beam‑wall system on a flag‑wall of the Cube building. (Client: City of Nantes · Architect: Stanton Williams)
Diagnostics, audits and technical expertise
We also carry out diagnostics throughout the project lifecycle:
- to assess an existing structure,
- to secure a design,
- to perform a technical audit,
- or to examine a specific situation.
These services are intended for clients, control offices, insurers, and design teams requiring specialized technical support.
Issy-les-Moulineaux, Housing — Analytical Document for Ground Adaptation (Client: Bouygues Immobilier · Architect: Fragments Architecture)
Fields of expertise
Our skills rely primarily on Eurocodes EC0, EC1, EC2, EC6, EC7 and EC8, along with related standards and DTUs, covering:
- geotechnics and soil adaptation,
- standard and complex buildings,
- reinforced concrete civil engineering structures,
- advanced structural analysis.
Mantes‑la‑Jolie, Val Fourré Sports Complex — Principal compression stress directions in the “wall‑beam”, with partial transfer of thrust through bi‑fixed supports and ground adhesion, preliminary design phase. (Client: City of Mantes‑la‑Jolie · Architect: K Architectures)
For projects involving complex lightweight framing—steel, timber, mixed—or façades, we work with specialized partners to deliver the best overall solution.
Why continue investing in concrete?
Contrary to common misconceptions, we believe concrete remains a strategic factor in the sector’s transition: it is omnipresent in refurbishment, difficult to replace in many structures, and offers significant room for improvement.
Nantes — Watteau Building — Major rehabilitation of an 18‑story building (Client: Nantes Métropole Habitat · Architect: Latitude Architectes)
Even modest innovations—both in material formulations and in structural analysis—can generate immediate and substantial environmental gains at the scale of a project.
This is why L‑SA dedicates its technical capabilities to these topics: to better understand and enhance existing construction, and to identify concrete avenues for significantly reducing the environmental footprint of structures.
Contact us
We work on projects of all sizes and offer tailor‑made services adapted to the context, constraints, and objectives of our partners.
We commit to providing:
- relevant and professional responses,
- responsiveness and bespoke support,
- creativity and innovative solutions,
- in a spirit of mutual support and trust, to build a lasting partnership.