| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a building board capable of restraining damage of an irregular pattern of a surface when packing.SOLUTION: The present invention relates to a building board 1 formed by respectively providing a first projection strip 21 and a second projection strip 22 in parallel to a plurality of lateral directions. The first projection strip 21 is formed in a cross-sectional triangular shape out of a first upper inclined plane 201 being an upper side inclined plane and a first lower inclined plane 211 being a lower side inclined plane. The second projection strip 22 is formed in a cross-sectional trapezoidal shape out of a second upper inclined plane 202 being an upper side inclined plane, a flat surface 212 and a second lower inclined plane 222 being a lower side inclined plane. A ridge line 4 formed by crossing the first upper inclined plane 201 and the first lower inclined plane 211 of the first projection strip 21 with an imaginary straight line 3 of vertically bisecting the building board 1, is positioned in an asymmetric place.</p> |
