How do you carry out structural reinforcement?
We distinguish three main approaches:
- dubbing : this involves adding a secondary, independent structure, which works with or in place of the existing one to take on the additional loads.
- The monthing : this technique consists of fixing elements on either side of an existing part (such as a beam) to improve its resistance and/or stiffness.
- Composite structures : here, the added element works in conjunction with the existing one. We are talking about a recomposed section, allowing it to take on greater loads and to stress both the existing structure and the added elements.
The chosen strategy will depend on the initial state of the structure, the accessibility of the site and the loads to be taken over.
Which wood material seems most suitable today to meet reinforcement constraints?
Kerto® LVL is one of the most efficient wood materials for reinforcement operations, thanks in particular to its excellent weight/resistance ratio, among other advantages that we can find:
- Excellent mechanical properties: Kerto® allows you to take on large loads while minimizing the quantity of material used.
- Lightness: This material is easily transportable and handled, which greatly facilitates interventions on constrained sites (difficult access, working at height, etc.).
- Wide range and customization: Kerto® offers a wide range of options and allows for numerous optimization options. In addition, ISB has an integrated cutting center, allowing for custom machining adapted to the project's constraints.
Kerto-S or Kerto-Q: which choice for which use?
Kerto comes in two main versions:
- Kerto-S beams: ideal for elements subject to bending (beams, joists, etc.).
- Kerto-Q panels: with cross-ply (up to 20%), particularly effective for composite structures or lamination, with reinforced screwing capacities.
Lighter versions of these products also exist, allowing for cost optimization while maintaining good performance for projects with more modest needs.
What are the challenges associated with these reinforcements?
Strengthening a structure also means facing sometimes complex constraints. One of the main challenges is taking into account the existing situation : you have to be able to characterize an often old structure, whose materials are not always documented or perfectly preserved.
"The lack of a clear insurance framework or precise diagnostics on the original structures can complicate studies," Pascal emphasizes. On the other hand, all the wood materials offered by ISB are certified, identified and perfectly characterized, guaranteeing their suitability for reinforcement operations according to current standards, in particular theEurocode 5.
What is the potential of this solution?
Structural reinforcement is a booming market driven by several trends:
- Regulatory changes imposing new charging or safety standards;
- The energy transition, which involves the installation of new equipment on existing buildings;
- The elevation, allowing for gains in living space and urban density;
- The rehabilitation of the building stock from the 70s/80s.
Structural reinforcement thus appears to be an opportunity for optimization and sustainability if we know how to use the right materials and techniques. Thanks to our technical expertise, we are able to assist you in securing and adapting your projects.
