I+A Laboratoire des structures

What I+A Laboratoire des structures does

I+A Laboratoire des Structures is a Paris-based structural engineering firm founded in 2012 by Mario Poirier, a dual-trained civil engineer and architect. The firm specializes in the design and dimensioning of multi-material structures, including concrete frames, timber and steel framing, and biosourced materials such as wood-straw, hemp concrete, and rammed earth. Its service portfolio spans structural conception studies, execution studies for construction firms, structural diagnostics and rehabilitation expertise (augmented by FARO 3D scanning of existing buildings), seismic design, and site monitoring. The firm serves three primary customer segments: architectural practices (as technical co-designer), public project owners (municipalities, regional governments, social housing landlords), and private real estate developers, across project sizes ranging from small social housing clusters to multi-million-euro mixed-use developments and cultural venues.

The firm operates a project-based professional services model, pursuing work through public and private tenders either as prime contractor (co-traitance) or subcontractor (sous-traitance). Revenue is generated from negotiated per-project fees rather than disclosed pricing schedules. Technology is operationalized through a BIM Level 3 collaborative environment using REVIT as the core modeling platform with IFC-based interoperability, supported by parametric modeling tools (Grasshopper, Kangaroo) and structural calculation software (SOFISTIK, ARCHE, MDBAT, ACORD RSA, KARAMBA). Its go-to-market is relationship-driven, relying on long-standing collaborations with a network of named architectural partners (NZI Architectes, Landfabrik, Agape Architectes, Engasser & Associés, Atelier A+I, Prax Architectes) and academic visibility through teaching at ENSA Paris Val de Seine.

The firm is privately held by its founder-partners with no institutional investors, no disclosed funding rounds, and a 14-person team. Geographic operations are domestic to France, with active projects across Île-de-France, Centre-Val de Loire, Normandie, Hauts-de-France, and Grand Est. The company has been recognized with four industry awards between 2019 and 2020 (Trophées Bois Île-de-France, Prix Architecture Occitanie, Prix National Construction Bois finalist status, ADC Awards nomination), establishing credibility in the low-carbon timber and biosourced construction segments.

Name

I+A Laboratoire des structures

Legal name

I+A LABORATOIRE DES STRUCTURES

Website

https://i-plus-a.fr

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

I+A Laboratoire des Structures is a Paris-based structural engineering firm founded in 2012, specializing in multi-material structural design (concrete, timber, steel, biosourced materials) and BIM Level 3 collaborative processes. It serves architects, public project owners, and private developers on conception, execution, and rehabilitation projects across France.

Ownership category

akta.pro rank

Product category

Structural Engineering Services

akta.pro primary industry

Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Structural engineering services
• Facade engineering design
• BIM collaborative modeling
• Biosourced construction materials
• Seismic structural design

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Structural Engineering Studies: Project-based fees for structural engineering services including conception studies, execution studies, and expertise services for construction projects in public and private markets.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

I+A Laboratoire des structures is a Paris-based structural engineering firm that designs and dimensions multi-material building structures (concrete, timber, steel, and biosourced materials such as straw, hemp concrete, and earth), and provides facade engineering, execution studies, structural diagnostics, and on-site monitoring. The firm operates under public or private tenders as prime contractor or subcontractor, serving architects, project owners, developers, and construction companies across France.

Product overview

I+A Laboratoire des structures is a structural engineering firm founded by engineers and architects, offering a unified portfolio of services centered on structural design and facade engineering. The core offering comprises structural engineering studies for multi-material structures (concrete, timber, steel, and biosourced materials), facade studies, execution studies, structural diagnostics, and site monitoring. The firm differentiates through specialized capabilities in complex geometry structures, seismic design, and biosourced materials (wood-straw, hemp concrete, rammed earth). Technology-enabled services include BIM Level 3 collaborative processes and 3D scanning of existing structures. The portfolio spans conception, execution, and expertise phases across public and private projects including housing, educational facilities, healthcare, cultural venues, and sports infrastructure.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Engineering Studies (Conception)

Quantifiable outcome

• Projects completed across France with various material approaches including biosourced materials

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

13 partnerships are on record, tiered core, regular and minor.

• NZI ArchitectescoreStrategic or Co-development PartnerLong-standing collaboration with NZI Architectes on numerous projects including the award-winning 13 wood-straw houses in Nogent-le-Rotrou, Centre d'activités scolaires in Bonneuil-en-France, and various other residential projects. NZI represents a key architectural partner for multi-material and biosourced construction projects.
• LandfabrikcoreStrategic or Co-development PartnerCollaboration with Landfabrik architects on biosourced material projects including sheep barn at Villavard pedagogical farm, media library in Mer, and innovative public space in Brangues. Strong alignment on sustainable construction approaches.
• Agape ArchitectescoreStrategic or Co-development PartnerPartnership with Agape Architectes on the Eglise Saint Joseph le Bienveillant project in Voisins-le-Bretonneux, a significant religious building with complex structural requirements.
• Atelier A+IcoreStrategic or Co-development PartnerMario Poirier was associated with Atelier A+I from 2008 as engineer partner. Current collaboration on projects including SICK company offices renovation in Emerainville.
• Overcode Architecture UrbanismecoreStrategic or Co-development PartnerCollaboration on PULP (Petites Unités de Lecture Publique) project in Villejuif, nominated for ADC Awards 2020.
• Engasser & AssociéscoreStrategic or Co-development PartnerPartnership on Centre Culturel d'Entreprises et d'Associations in Paris 18th (3,400,000 euros project) and 104 housing units in Ivry-sur-Seine (11,700,000 euros project).
• Prax Architectes / PE VerretcoreStrategic or Co-development PartnerCollaboration on Centre d'Entretien et d'Intervention de St Béat (won Prix Architecture Occitanie 2019) and Usine Regnault in Coutances.
• SWITCH (BET Fluides)regularTechnology or IntegrationRegular engineering partnership on MEP/fluids coordination for projects including Brangues public space, Eglise Saint Joseph, and various other complex projects requiring integrated technical design.
• WOR (Fluides/Thermique)regularTechnology or IntegrationRegular collaboration with WOR on thermal, fluids, and engineering aspects for projects including Centre Culturel Paris 18th, 26 participatory housing units in Montreuil, and PULP Villejuif.
• TECS (Economiste)regularTechnology or IntegrationRegular partnership on economic studies and cost estimation for projects including Centre Culturel Paris 18th and 104 housing units in Ivry-sur-Seine.
• PCE Tech (Fluides/Economie)regularTechnology or IntegrationCollaboration on mechanical and electrical systems and economics for projects including Centre Scolaire Bonneuil-en-France and 13 wood-straw houses in Nogent-le-Rotrou.
• AAIIA (Association Architecte Ingénieur & Ingénieur Architecte)minorStrategic or Co-development PartnerMario Poirier participates in AAIIA activities including conferences and events. The association promotes collaboration between architects and engineers.
• Ecole Nationale Supérieure d'Architecture de Paris Val de SeinecoreStrategic or Co-development PartnerMario Poirier serves as permanent teacher at ENSA Paris Val de Seine since 2014. The firm benefits from academic credibility and access to emerging talent in the architecture field.

Scale indicators1 record

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Arup: Global engineering consultancy with Paris-based structural engineering team specializing in complex geometry, facades, and sustainable construction — competing for high-end architecturally-led French projects.
• AIA Life Designers: French architect-engineer multidisciplinary firm offering integrated design services including structural engineering; comparable engineer-architect integration model but at much larger scale, competing for healthcare, housing, and public projects.
• Setec Bâtiment: Major French engineering group with a structural and buildings division serving public and private projects across France — offers overlapping capabilities at much larger scale, competing for many of the same public tenders as I+A.
• Egis Bâtiments: Large French engineering firm with structural, facade, and sustainability capabilities serving public infrastructure and building clients — competes with I+A for nonresidential public tenders and increasingly in biosourced/low-carbon construction.
• Tractebel (Engie): French/Belgian engineering consultancy with structural and sustainable building expertise; broader portfolio than I+A but competes for architecturally ambitious and sustainability-driven French projects.

Direct peers

• Schlaich Bergermann Partner: Specialist structural engineering firm known for innovative and lightweight structures, including timber and sustainable designs — comparable technical differentiation and architect-collaboration positioning, albeit larger and German-headquartered.
• Buro Happold: Global structural and MEP engineering consultancy with a Paris office; competes for complex architecturally-led projects and has expanded sustainable structures expertise, comparable to I+A's high-end structural and facade work.
• EVP Ingénierie: Paris-based structural engineering firm where I+A founder Mario Poirier worked prior to founding I+A; comparable in size, French market focus, and structural engineering service offering for architect-led projects.
• Batiserf: French structural engineering firm (Lyon) specialized in complex geometry and multi-material structures, working closely with architectural firms on award-winning projects — directly comparable in scale, niche focus, and architect-collaboration model to I+A.
• Bollinger+Grohmann: International structural engineering consultancy with a Paris office; comparable focus on architecturally ambitious projects, complex geometry, timber and sustainable materials, and deep integration with architectural design teams.

Market position

Strengths5 records

Weaknesses3 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/i-a-laboratoire-des-structures
• Instagraminstagram.com/labo_des_structures

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about I+A Laboratoire des structures