To increase the permeable load of a building and to increase the amount of weight articles. And to increase the amount of the available weight articles, and furthermore, to increase the handling amount and the handling area in the weight article, when the limit load of the building floor is insufficient.

A structural member 8 is provided on a building floor 4, and a shielding cell 1 as a weight article is set on the structural member 8 as a supporting frame. An anchor 9 is installed on the lower surface of the structural member 8, and the anchor 9 is fixed or supported by sticking it to the building floor 4 where long side direction floor beams 10 and 11 provided on the lower face of the building floor 4 are positioned. The structural member 8 has a rigidity higher than the building floor 4, and the weight is dispersed to the long side direction floor beams 10 and 11, so as to add the load to the shielding cell 1. As a result, the permeable load of the building can be increased.