| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a composite board excellent in surface decorativeness, high in surface hardness and provided with excellent strength and rigidity, and provide a stair treadboard formed of this composite board. SOLUTION: A composite board 1 is composed of a wood cut piece board 10 formed of OSB of 21.1 mm in thickness, veneers 20 of 3.2 mm in thickness respectively laminated on both front and rear faces of the wood cut piece board 10, and wood fiber boards 30 formed of MDF of 4.0 mm in thickness laminated on the surfaces of the respective veneers 20. A sliced veneer 40 of 0.2 mm in thickness is stuck to the upper face and the butt end face to be the front face side of the composite board 1. Shallow U-shaped slip stop grooves 2a are formed on the upper face with the sliced veneer 40 stuck thereto, and the composite board 1 is used in such a way that the fiber direction of the veneers 20 points in the longitudinal direction of the treadboard.</p> |
