HUAI'AN SPRING WOOD INDUSTRY

LVL is made by laminating rotary-cut veneers in a parallel grain direction and bonding them under heat and pressure. Knot-free, stable and uniform in strength, it comes off the same line for structural and furniture use. Structural grades are produced under JAS certification in 30, 38 and 45 mm thicknesses and 3 m and 4 m lengths, up to 12 m. HARU PLYWOOD produces it in our own factory in Jiangsu, established ten years ago and supplying Japanese customers on an OEM basis from the start. In construction it forms sills, studs (30 × 105 mm), shear-wall bracing, lintels, floor beams and roof purlins; 12 m lengths remove site splicing. In furniture it is the hidden load-bearing part: bed slats, sofa and armchair seat and back frames, chair inner frames, table legs and stretchers, cabinet frames and drawer sides. Knot-free and defect-free, it holds hardware without working loose, cuts full length with little waste, and a veneer or melamine face makes it a finished product. Moisture content stays below 14%, so wall surfaces do not swell and nail heads do not pop.

Plywood is made by bonding an odd number of veneers with the grain of adjacent layers at right angles. Strength is balanced in both directions and the panel resists distortion. The Japanese standard size is 910 × 1,820 mm with 12, 15, 18 and 24 mm thicknesses. HARU PLYWOOD produces it in our own factory in Jiangsu, which has supplied Japanese customers on an OEM basis since it was established ten years ago, under the same quality control as our JAS-certified LVL. In construction plywood provides the surfaces: 12 mm floor sheathing, 9–12 mm wall sheathing — the designated facing of Japanese shear walls, where seismic performance depends directly on nail withdrawal — and 12 mm roof sheathing. Formwork plywood (konpane) is reused five to eight times. The floor, walls and roof of a timber house are all plywood surfaces. In furniture it is the most versatile substrate: shelves, backs and drawer bottoms; dining and desk tops; moulded plywood chair seats and backs; bed frames and cabinet sides. At equal thickness it is lighter than solid timber and wide door panels stay flat.