2023-07-26 22:00:00
What is off-site construction?
Reliable alternative to traditional building sitethe construction hors site may concern all types of buildings : hotels, offices, industrial buildings, logistics platforms, housing, schools, etc.
Construction hors-site : definition
The construction hors site involves the prefabrication of the elements of a building, be it walls, floors, roofs, facades…. These elements can be made of concrete, steel, bois or other materials. They are then transported to the site of constructionwhere they are assembled to form the final building.
If this construction method is highlighted today, it is because it allows to considerably reduce the time of construction on site, as well as the costs of labor and materials. In addition, it makes it possible to respond to the future challenges of the building sector such as the reduction of the ecological impacts linked to construction, the scarcity of skilled labor for a construction site. It also reduces the number of disputes related to poor workmanship et malfunctions through a more scrupulous control of prefabricated elements in factory.
THE constraints related to this manufacturing technique
The construction hors-site has been successfully used in many building projects worldwide. THE architects and the design offices are increasingly using this construction method to design prefabricated buildings durable and aesthetic. However, the development of construction hors-site is constrained by many brakes:
· Regulatory : in France, the regulations are highly restricted with regard to the construction hors-site bois or steel. There ESSOC law has made it possible to change this trend by increasing the freedom to innovate in the construction sector, but it remains insufficient compared to what is practiced in certain countries such as England with, in particular, the creation of BOPAS.
· Economic : A company that wants to get into the construction hors site must drastically change the economic model, because it is not the same logic that governs the logistics or thedelivery of prefabricated parts. In addition, emphasis must also be placed on staff training in this new construction method,
· Cultural : the off-site building construction is still frowned upon in France even if mentalities are changing rapidly, especially through the prism of the challenges of ecological transition.
The advantages of off-site construction
The construction hors site presents many benefits compared to the traditional construction.
A more economical method of construction
Build an off-site building is much faster, because most of the elements are prefabricated in the factory, which saves time on the site de construction. Respect for process strict and supervised within a production chain allows a company to respect its commitments vis-à-vis its customer in terms of deadlines and prices. Companies that have adopted this method have seen productivity gains of at least 50%, which can even be pushed up to 70%. Off-site construction thus presents itself as a sustainable solution for improving the productivity of a construction company All controlling costs and ensuring the quality of the finished product.
A more reliable solution for the construction of a building
THE prefabricated elements are produced under controlled conditions in factorywhich makes it possible to guarantee quality standards high. By opting for a building constructed off-siteyou will enjoy the following advantages:
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A reduction of lead timesfrom 20 to 30% and up to 60% in modular wood.
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An industrial quality of construction, with perfect conformity to the design linked to the precision of realization, thus avoiding poor workmanship.
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Optimal working and safety conditions for construction workerswith in particular a significant reduction of accident risks related to the context of a construction site.
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Fight once morest labor shortage : on the construction site, the need for qualified employees is permanent because it is essential that each employee can cope with the vagaries of the terrain independently. In the factory, it is easier to train and supervise a industrial labor.
Off-site construction, a future solution for the environment
Build off-site allows reduce the carbon impact of one construction site : this technique therefore constitutes a solution durable for the future of building sector, which alone generates 23% of GHGs in France. There environmental regulations (RE2020) aims to transform construction techniques with the aim of minimizing the environmental impact of a building throughout its life cycle. Off-site construction makes it possible to face these challenges for several reasons:
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Nuisances are reduced to their bare minimum on site, with 50% less structural work flow and 95% less flow in modular stagewhich allows to to decongest urban areas, where there is not necessarily room for a construction site
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L’factory assembly allows to reduce theimpact of a construction site for local residents (noise, dust, etc.).
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This method reduces the energy consumption up to 50%, and CO2 emissions by up to 20%
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The construction hors-site allows a better waste recovery in factories and on site.
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