BUILDING BOARD, FITTING STRUCTURE OF THE SAME, AND LAP LAYING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a building board fitting structure capable of suppressing an increase in types of building boards and of increasing variation.SOLUTION: The structure is constituted by vertically piling a plurality of building boards 1. Vertically adjoining building boards 1 are arranged by laying part of the upper building board 1 on a front side of the lower building board 1. A plurality of non-exposing parts 2 with different overlapping sizes L2 of the upper building boards and the lower building boards are provided.