| 摘要 |
PROBLEM TO BE SOLVED: To provide a brick that facilitates and improves accuracy of brick laying work and suppresses positional deviation during the brick laying work, without requiring mortar or other inclusion.SOLUTION: A brick 1 has a first main surface 11 and a second main surface 12 on one side Z1 and the other side Z2 in a thickness direction Z. The brick 1 includes a pair of protrusions 2a, 2b protruding from the first main surface 11 in the thickness direction Z and positioned next to each other in a length direction X, and a pair of recesses 3a, 3b dented on the second main surface 12 in the thickness direction Z to be engaged with the protrusions 2a, 2b, and positioned next to each other in the length direction X. The protrusions 2a, 2b have a first protruding part 21 protruding toward one side X1 in the length direction X, a second protruding part 22 protruding toward the other side X2 in the length direction X, a third protruding part 23 protruding toward one side Y1 in a width direction Y, and a fourth protruding part 24 protruding toward the other side Y2 in the width direction Y.SELECTED DRAWING: Figure 2 |
