CEILING MATERIAL, CEILING STRUCTURE AND CONSTRUCTION METHOD THEREOF

PROBLEM TO BE SOLVED: To suppress sagging of ceiling materials 5, 5,... in a ceiling structure A in which the ceiling materials 5, 5,... are supported by ceiling joists 1, 1,..., as well as reducing a manufacturing cost and saving weight.SOLUTION: The ceiling structure A comprises the plurality of ceiling joists 1, 1,... disposed in parallel with each other and the plurality of rectangular shaped ceiling materials 5, 5,... including fiber materials extending in the same direction supported between the plurality of ceiling joists 1, 1,... On the upper surface (back surface) of each of the ceiling materials 5, a fiber direction indication portion 7 for indicating the fiber direction which is a direction along the fiber material is marked. The plurality of ceiling materials 5, 5,... are with regard to the ceiling joists 1, 1,... fixedly supported by a tapping screw B so that the fiber direction indicated by the fiber direction indication portion 7 of each ceiling material 5 intersects orthogonally with the ceiling joists 1, 1,...SELECTED DRAWING: Figure 1 【課題】天井材５，５，...が野縁１，１，...に支持される天井構造Ａにおいて、製造コストの低減や軽量化を図りつつ、天井材５，５，...の垂れ下がりを抑制する。【解決手段】天井構造Ａは、互いに平行に配置された複数の野縁１，１，...と、これら複数の野縁１，１，...間に支持され、同じ方向に延びる繊維材料を含む矩形状の複数の天井材５，５，...とを備えている。各天井材５の上面（裏面）には、その繊維材料に沿った方向である繊維方向を表示する繊維方向表示部７が印されている。複数の天井材５，５，...は野縁１，１，...下面に対し、各天井材５の繊維方向表示部７で表される繊維方向が野縁１，１，...と直交状態に交差するようにタッピングビスＢにより固定支持されている。【選択図】図１