Structural plywood is a wood-based panel material used in structurally critical components of wooden buildings to ensure seismic resistance and durability. ○Product Standards Complies with various standards stipulated in the Japanese Agricultural Standard (JAS), including ""bending tests,"" ""adhesive strength tests,"" and ""formaldehyde emission tests."" ○Technical and Functional Characteristics ・Cross-laminated structure: Three or more veneers are bonded with their grain directions perpendicular to one another, reducing anisotropy in in-plane shear and bending performance. ・Superior mechanical performance: High nail-holding capacity and rigidity, functioning as load-bearing walls and structural diaphragms that resist horizontal forces during earthquakes. ○Technical Data ・Standard product dimensions: Width 910–1,000 mm × Length 1,820–2,000 mm ・Thickness: 9 mm, 12 mm, and 15 mm for floor and wall underlays; 24 mm and 28 mm for joist-free flooring systems. ・Strength grade: Grade 2 ・Adhesive durability: Phenolic resin adhesive is used, achieving the highest JAS classification of ""Special Class (Toku-rui)"" for water and moisture resistance. ・Low formaldehyde emissions: F☆☆☆☆ grade (highest grade). ○Applications and Usage in Buildings ・Wall underlays and load-bearing walls in traditional wooden post-and-beam construction and platform frame construction (2×4 method). ・Floor underlays using thick plywood (24 mm or more), allowing floor panels to be fastened directly without the need for joists. ・Roof underlays (sheathing boards): Used as base boards to support roofing materials such as roof tiles and slate. ○Features of the Shikoku Plant ・The Shikoku Plant commenced operations in 2011 and is located in Komatsushima City, Tokushima Prefecture. It is the only plywood manufacturing facility in the Shikoku region and boasts the highest production capacity among all six Nisshin plants.