| 摘要 |
[PROBLEMS] To provide an easy-to-work wall panel exhibiting sufficient fire resistance and heat resistance in which the amount of material of a mounting board is reduced and joint of panels is facilitated, and a method for producing it. [MEANS FOR SOLVING PROBLEMS] The wall panel (1) has an interior material (3) between a pair of mounting boards (2, 2), wherein the mounting board (2) has a portion (2a) formed by folding the opposite ends inward, and a joint metal (4) provided with a protrusion (4a) or a recess (4b) and a shoulder portion (4c) continuous to the protrusion (4a) or the recess (4b). Wall panels (1, 1) are jointed together by coupling the folded portion (2a) and the shoulder portion (4c) and fitting the protrusion (4a) to the recess (4b), and the joint metal (4) is divided substantially at the center of the protrusion (4a) or the recess (4b) into the surface side and the back side.
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