Cross laminated timber (CLT)
Its structural performance, versatility, constructive simplicity and the capacity it offers to develop high-rise projects similar to concrete or steel have turned cross-laminated timber (CLT) into a great revolution that is transforming the paradigm of the construction sector.
Egoin produces annually a total of 35,000 m3 of cross-laminated timber for structures for structures in construction projects (integral engineering and construction process).
What is CLT?
The CLT is a panel made up of layers of sawn timber glued together with structural usel, so that the orientation of the fibers of two adjacent layers is perpendicular to each other. Each of the boards that make up the layers of the board have been structurally graded beforehand.
The transverse structure of the panel must be symmetrical and consist of at least three layers. The boards of each layer may be joined longitudinally or by means of finger-joints.
The wood used in cross-laminated panels must be dry and structurally graded, although a small percentage of boards per layer may be exempt from this grading. Typical strength classes range from C16 to C24.
Structural cross-laminated panels have a wide dimensional range and the thickness of the pieces of wood used in each layer varies according to the manufacturer, although the width/thickness ratio is usually considered to be higher.
The cross-laminated timber construction elements are divided into independent pieces that are assembled on site.
Generally, panels constructed of CLT panels are assembled and cut during the production phase, and already include the joints, openings and perforations specified in the design.
Areas of Application
Structural solutions for high-rise buildings
Infrastructure and major works support
Interior and exterior walls
Division of heights (floors)
Coatings and ceilings
Advantages
Lightness
Despite its strength, CLT lumber is relatively lightweight compared to other building materials, making it easy to transport, handle and install at the construction site.
Cost control
By being precisely cut, CLT panel manufacturing minimizes material waste during the construction process. This helps optimize the use of wood and reduces the costs associated with wood waste. Due to its light weight compared to other materials, transporting CLT panels is more efficient and less costly. The ability to stack and transport large quantities of these prefabricated panels in one shipment can reduce logistics costs.
Reduced assembly times
The construction process with cross-laminated panels requires an exhaustive definition of the project in terms of the needs of each structure, definition of the openings, type of joints, channeling, services, etc. Preliminary engineering work allows the completion of a design precisely adjusted to the needs of the project.