Structural expertise: assessment of load-bearing capacity

Our structural expertise to meet your needs:

Assess the performance of your existing structures or buildings in their current state of conservation (building, civil engineering, engineering structures)
Design the actions to be taken to restore structures’ initial level of service or increase their resistance capacity (concrete, metal, masonry and wood)
Assess the feasibility and design your modification or rehabilitation projects (bridge widening, replacement of bearings, modification of the operating methods, building raising, etc.)

Surveying existing structures:
on-site testing, mechanical tests and instrumentation

Non-destructive testing of structures (cover meter, radar, 3D tomography, etc.). Discover our dedicated content on testing tools – structures and materials
Measurement of residual tension of prestressing cables using the “cross-bow” tensile measurement method
Surveying of the geometry of structures using in-situ measurement campaigns, infrared readings, photogrammetry and 3D scanning. Learn more about digital inspection
Verification of reinforcements (passive reinforcements, prestressing reinforcements) by delicate concrete chipping
Sampling and compression tests on concrete cores or masonry blocks to assess its residual strength. Learn more about analysis and testing laboratory
Visual classification, sampling and mechanical characterisation of wooden structures (solid wood, glued laminated timber)
Sampling and tensile tests on steel and puddled iron samples. Learn more about analysis and testing laboratory
Instrumentation, establishment of alert/alarm thresholds, supervision and treatment of measurements, interpretation, monitoring. Learn more about our Monitoring solutions

Assessing the existing structure: studies, modelling and recalculation

Structural recalculation is the daily activity of our structural engineering office. Our experience in this field has enabled us to develop a solid verification methodology.
This effectively combines flexibility and thoroughness.

Its flexibility allows us to process input data which is often incomplete and to meet multiple needs: operational changes, analysis of defects, changes in the structure or its environment, taking a degraded state into account, etc.
Its thoroughness guarantees the reliability of our conclusions, which is vital in terms of structural safety and property management.
The main stages in our methodology:
- documentary study (structural file, old regulations, etc.)
- determination of the relevant normative and regulatory standards
- pseudo-regulatory approach (adaptation of safety coefficients, regulatory criteria, etc.)
- taking into account the state of conservation of the structure (residual resistance of materials, cracking, corrosion, degradation of ductility capacities, etc.)
- 3D finite element modelling (Nemetschek SCIA Engineer® software, Graitec Advance Design®, Autodesk Robot Structural Analysis® and CESAR LCPC®)
- use of any instrumentation data and modelling calibration
- verification of structural safety, serviceability, fire resistance time
- identify the origin of the defects, assess their harmfulness
- assess the residual lifespan

Carrying out work on the existing structure: making safe, repairing or reinforcing

The immediate consequences of our studies: what actions to take?
Our engineering office has developed cutting-edge expertise in repair and reinforcement solutions, from the simplest to the most innovative. Our active technology watch ensures that we can always offer the technologies most suited to our customers’ needs: optimised cost and implementation time, minimal impact on operations, etc.
The techniques we practice daily in our studies include:

additional prestressing
bonded composite material
shotcrete
ultra-high performance fibre-reinforced concrete (UHPC)
underpinning by micro-piles
jacking
structural injection
repair of wooden structures using composite rods
repair of metal structures by welding, bolting, riveting, etc.
emergency shoring or reinforcement
etc.

Modifying existing structures: supporting your projects

Your structures need to adapt to your changing needs.
We place our structural expertise at your service at all stages of your projects to adapt existing structures: from feasibility studies to execution studies.
Some examples:

building raising project
changes to the operation of a building
replacement of the roof cover
fitting with photovoltaic panels or green-planting of a flat roof
repair of a masonry arch bridge with a shotcrete counter-arch
repair of a hydraulic metallic conduct with shotcrete
widening of a bridge
reinforcement of an engineering structure by additional prestressing or bonded composite material
jacking and replacement of bridge’s bearings
bridges verification for exceptionnal loads

Sixense: your partner for all engineering appraisals
of existing structures

A unique partner

with comprehensive engineering expertise in existing structures: by contacting Sixense, you can be sure of obtaining a relevant answer and a tailored solution

More than 20 years of experience

a panel of experts with a comprehensive, safe and efficient diagnostic capacity

Structural expertise for all types of materials

reinforced and prestressed concrete, steel, solid and glued laminated timber, masonry, cast iron, puddled iron, etc.

A commitment to sustainable development

since the sustainability of structures reduces our environmental impact and our carbon footprint