Heritage structures, by their very nature and history (material and assembly), present specific challenges in diagnosis, analysis and rehabilitation, which limits the application of modern codes and building standards.

In this particular market, Freyssinet is seen as a provider of high-quality reinforcement and preservation solutions that few other companies are able to design and deliver.

  • Types of structures

    Historical buildings
    Masonry bridges
    Castles
    Churches
    Convents
    Crypts
    Fortifications, Archaeological sites

Our guiding principles

Heritage structures are considered to be existing structures with significant cultural value. They are mostly made of masonry or timber, sometimes of concrete or steel, and with elements in steel or iron.
Their structural rehabilitation is, usually, motivated by one or more of the following circumstances:

  • The existence of visible defects
  • Damage after a particular event (earthquakes, flooding, fires, etc)
  • The change of use for more severe conditions or the change of regulations

Their rehabilitation or restoration has major implications from an architectural, historical, structural, economic and social point of view, and implies the respect of very strict guiding principles.

It is essential to ensure that the structural elements are capable of supporting the loads they may have to carry. When in action on the site, the contracting company should be able to respect the structural safety at all times.

Often when there are superficial cracks in a heritage building, temporary patches are done with the aim of not disturbing the structure too much. However, these superficial cracks can indicate a much deeper problem with the foundation or structural damage, needing major repairs rather than simple patches.

Many heritage buildings feature building materials that have not been used in over a century. Such materials are not designed to withstand the abuse that contemporary physical and chemical construction tools cause. In many cases, these building materials are also irreplaceable.

The architectural style and integrity of the structure need to be maintained carefully. It is nearly impossible to avoid all additions, but they should be minimal – for example, retaining as much historic timber as possible, minimising the introduction of supportive structures, selecting the most similar materials, considering their access on site, etc.

The solution implemented must be adequate and conform to current standards, but aesthetically and architecturally elegant and neat or invisible.

Modifications and additions should also be reversible without damaging the structure.

Full service  

Our solutions and technologies for heritage structures

Timber and wooden structures (solid or glulam)Masonry structuresConcrete structuresSteel structures
Preparation
  • Cleaning, sanding and stripping
  • Cleaning (micro abrasive blasting, cryoblasting, etc)
  • Cleaning (hydroblasting, cryoblasting, etc)
  • Hydrodemolition
  • Sampling and testing campaigns
  • Cleaning

 

Repair
  • Patch repair (resins)
  • Shoring systems
  • Reconnection of cracked sections, restoration of monolithism
  • Delamination repair
  • Recovery of lost elements
  • Damage restoration
  • Shoring systems
  • Crack sealing
  • Injections
  • Injections
  • Patch repairs (cement mortar)
  • Replacements
Strengthening
  • Active tie rod reinforcement
  • Additional prestressing
  • Bottom and upper inertia reinforcement
  • Lateral beam reinforcement
  • New self-supporting slabs
  • Passive and active reinforcements (internal and external)
  • Composite materials
  • Dry sprayed concrete
  • Abutments
  • Composite materials
  • Dry sprayed concrete
  • Structural repair mortar spraying
  • Additional prestressing
  • UHPC
  • Passive steel reinforcement
  • Composite materials
  • Additional prestressing
  • Passive steel reinforcement
  • Metal arches with concrete beams
Protection
  • Preventive and curative treatments
  • Treatments
  • Corrosion  protection of rebars
  • Cathodic protection
  • Waterproofing
  • Impregnations & coatings
  • Corrosion protection
  • Fire protection
General services, regardless of the base materialCondition assessment, Work in challenging environments, Platforms and means of access, Demolition, Asbestos removal, Construction methods, Operations with hydraulic equipment, Seismic isolation, Structural modifications, Substitutions, Improvements, Underpinning, Energy efficiency

Our references

Convent-Santa-Maria-Spain
Consolidation of Santa Maria de Los Reyes convent, Sevilla, Spain

Stop the deterioration process
Reinforce structural elements
Upgrade some spaces to standards.

Convent built between the 17th and 19th centuries, partially refurbished in 1992 and used for exhibitions and conferences.

/ Solutions provided:

  • Consolidation of foundations
  • Structural stabilization of masonry walls (lime and fiberglass)
  • Reinforcement of the wooden structure
  • Roofing and cladding works
  • Plumbing, electricity, air conditioning and ventilation

Renovation and change of use

Renovation of a freight warehouse at  Austerlitz station designed by Eugène Freyssinet in 1927-1929, to convert it into a building (Station F) housing start-up companies

/ Solutions provided:

  • Structural measurements based on historical plans, and modelling to obtain all measurements
  • Structural and material diagnostics
  • Concrete surveys and purging of damaged concretes
  • Cryogenic concrete blasting
  • Concrete repairs
  • Reconstitution of mullions
  • Crack seaming with carbon fiber fabric reinforcement
  • Protection of concrete

See video on Freyssinet YouTube Channel

Freyssinet Hall France
Renovation of Freyssinet Hall, Paris, France
Maintenance of San Jordi bridge, Alicante, Spain
Maintenance of San Jordi bridge, Alicante, Spain

Maintenance and repair of defects

Bridge built between 1925 and 1931 in the art-deco style, used as a public road.

/ Solutions provided:

  • Hydro-cleaning and sandblasting
  • Concrete passivation and recovery of volumes
  • Anti-carbonation coating
  • Treatment of metal railings
  • Restoration of lighting system

Strengthening and major seismic upgrade

130 years old brick building damaged by an earthquake in November 2016.

/ Solutions provided:

  • 46 11.2m long Freyssibar, anchored within the brick wall in the basement floor.
  • 1.2m of each bar grouted to act as a dead end anchorage.
  • All bars stressed and grouted subsequently under completion.
Strengthening of a 130-year old building in Wellington, New Zealand
Strengthening of a 130-year old building in Wellington, New Zealand
Kettering & Wellingborough canopy, cast iron roof refurbishment, Northamptonshire, UK
Kettering & Wellingborough canopy, cast iron roof refurbishment, Northamptonshire, UK

Cast iron roof refurbishment

Due to the railway, electrification, the canopies overhanging the track had to be carefully removed and replaced with a look-alike shorter arm, under short night closures (4-6 working hours).

/ Solutions provided:

With the arm removed the remaining roof now lacked the counter-balancing effect of the cantilever.

Consequently, before an arm could be removed, it has been necessary to install temporary supports in such a way as to not interrupt the flow of passengers during the day.

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