| 摘要 |
PROBLEM TO BE SOLVED: To prevent effects on the outside due to remanent magnetism by defining a return path of magnetic flux in a specified direction, while inducing and converging magnetic flux from remanence existing in the end portion of a steel plate. SOLUTION: A blocking member 6 which induces and converges magnetic flux due to remanence is arranged on an end portion 4 of a steel material the end portion of which has remanence. The blocking member 6 is formed into a shape which defines the return path of magnetic flux in a prescribed direction. Magnetic flux due to remanence is olirected to the outside of a region 7, in which electronic apparatuses would be arranged after a building is completed, and magnetic obstruction to the electronic equipment is prevented. |
