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Laminated Wood

Laminated Wood

Manufacture of JAS-certified structural laminated wood.

Glued laminated wood is a type of laminated wood that is manufactured according to its length, thickness, strength, etc., in accordance with its purpose to provide the required strength in a stable manner. It is a revolutionary building material that can be used for

Broadly speaking, there are two types of laminated timber: structural laminated timber and structural laminated timber. Glued laminated lumber for construction is used for furniture, counters, stair rails, etc.

Structural laminated wood is used for columns and beams.

Laminated Wood

Features of laminated wood

LVL provides solid house walls that are resistant to warping and bending

Glued laminated wood is a super-engineered wood, which is made by reconstructing small wood (boards) with small cross-sectional dimensions using adhesives, and can be freely adjusted in width, thickness, and length direction, making it possible to produce long and curved wood.

about 1.5 times stronger than solid wood

The defects of wood such as large knots and splits are removed during the manufacturing process, and acceptable defects such as small knots are eliminated in the manufacturing process. Dispersion in the product reduces strength variations and ensures quality uniformity. It is 1.5 times stronger than solid wood.

Fire resistant and maintains internal strength

The surface of the wood burns, but as the cross-sectional size of the wood increases, the surface is scorched and forms a charred layer, cutting off the supply of oxygen to the interior, making the interior less flammable
The internal strength of the laminated wood is therefore maintained and the necessary structural strength is maintained.

Maintains high strength and resistance to deterioration over time

In addition, it is less likely to deteriorate over time, such as bending, warping and cracking, and maintains the strength of the structure over time.

Laminated Wood production procedure

We cut wood products from logs purchased from Japan, Scandinavia and other countries.


The skins stripped here are also reused as biomass energy to generate electricity at the plant.


Grinding board (lamina)

natural drying

The wood is dried under the sun for about three months in a well-ventilated condition to ensure that the moisture content of the wood is uniform.

artificial drying

It is dried artificially for about a week to reduce the moisture content to less than 15%, prevent warping and cracking, and increase its strength.

Grading and sorting

The load applied to the board is sorted by determining the strength in relation to the deflection. Based on the data from the moisture test, strength test, and appearance test, the sheets are sorted by grade.


The wood is cut to remove unwanted parts of the wood, such as large knots, splits, rot, and insect bites.

finger joint

Cross-cut lumber is finger-jointed to produce long pieces.

Lamina cutting (plate cutting)

The boards are cut evenly using high speed molders that process the subtle irregularities in the surface of the wood at a speed of 150 meters per minute to adjust the dimensions of the boards.

laminar bond

A water-based polymeric isocyanate adhesive (non-formaldehyde) is applied to the laminar, laminated and pressed.

Pressing & Finishing

The unevenness caused by the gluing process is removed with a molder (automatic planer), the surface is smoothed, and the dimensions are adjusted and finished.

Inspection and shipping

Each product is rigorously checked and shipped.

Business Outline(About Us?)Laminated WoodLVLPrecutRecyclePurchase.DivArchitect・CAD.DivLogisticsEnvironmental Initiatives