Laminated Veneer Lumber (LVL) is a derivative of wood composed of glued natural wood veneers.

This type of technical wood is mainly used in construction and has some advantages over traditional sawn wood: stronger, lighter, straighter and more stable. Knots also do not weaken the result as they do in sawn wood.

This technical innovation was developed in the 1970s. However, it was not incorporated as such in building codes until the 1990s.

Features of Microlaminated Wood

The particularity of the microlaminate in relation to other similar products is that the leaves are glued keeping all in the same direction of the grain. On some occasions, the plates are inserted in the transverse direction, to improve stability, although the percentage of these does not exceed 20%.

There is no standard number of sheets, from several tens to a minimum of 5. And in terms of thickness, it is usually no more than 6 mm per sheet. There are important differences depending on the manufacturer.

If they use phenolic adhesives, which improves the properties of the wood against the elements. Which does not mean much less that all this type of wood can be used outdoors.

Fir wood is mainly used, although you can also find pine and even beech. Therefore, the density varies according to the species used: from 450 kg per cubic meter for fir to 730 for beech.

Is very more stable than lumber. Therefore, it deforms less and its contractions are less.

The fact of using plates for their manufacture allows them to be manufactured curved parts.

It is sold in different finishes depending on the degree of brushing and the quality of the veneer.

Microlaminated Wood VS Crossed Wood

Although it is common to compare it with cross laminated wood (Cross Laminated Timber or CLT), there are important differences.

Microlaminated wood has properties orthotropic, that is, its mechanical properties are different depending on the direction of its axes. In our case, the best tensile and compression resistance is achieved in the direction of the fiber and, therefore, also the worst characteristics in the direction perpendicular to the fiber. Its use is, therefore, limited to edge bending when it must support loads.

Plywood, like plywood, is isotropic: it has the same properties in all directions.

Main Uses

The main use of micro-laminated wood is structural: beams, trusses, trusses … In fact, it can be used in any area where sawn wood is used, with the particularity of improving stability and obtaining greater lengths.

We can also do this in double T beams, micro-laminated boards, steps and scaffolding, furniture …

According to the UNE standard and its use is classified according to:

  • LVL / 1 Applications in dry environments.
  • LVL / 2 Applications in humid environments.
  • LVL / 3 Outdoor outdoor applications.

The micro-laminated plate

microlaminated plates

As already mentioned, the main uses of this type of industrial wood are structural. However, micro-laminated cards are also used, albeit more residual, for the manufacture of furniture and decoration.

In a sense, we can find them on table tops, coverings, countertops …