さらに、本例では、外部断熱層４１で覆われた領域内においてロックウール層１５を上下に分断する防湿部材４２を配置することにより、外部断熱層４１で覆われていない領域からロックウール層１５内に侵入した湿気が、床スラブ４近傍にまで侵入して結露するのを防止することができる。防湿部材４２としては、金属製、合成樹脂製のいずれであってもよく、通気性がなく、ロックウール層１５を上下に分断できる水平方向に長尺の部材であれば、形状は特に限定されないが、図５に示すように、カバー片４２ａと、該カバー片４２ａと平行な取り付け片４２ｂと、該カバー片４２ａと取り付け片４２ｂとを接続する接続片４２ｃとからなる断面が略Ｚ字型の部材が好ましい。係る防湿部材４２は、断熱パネル１２に不図示のビス或いは接着剤等により取り付けられ、カバー片４２ａがロックウール層１５表面を覆い、接続片４２ｃがロックウール層１５を分断する。尚、本例では、接続片４２ｃを中心に取り付け片４２ｂを床スラブ４側に向けて防湿部材４２を配置しているが、本発明ではこれに限定されない。逆に、カバー片４２ａを床スラブ４側に向けて配置しても良いが、その場合には、床スラブ４を挟んで上下に配置する防湿部材４２，４２のカバー片４２ａ，４２ａの端部同士が突き当たらないようにする必要がある。床スラブ４を挟んで上下に配置する防湿部材４２，４２のカバー片４２ａ，４２ａの端部同士が突き当たった場合には、該カバー片４２ａ，４２ａが床スラブ４の端部を屋外側から完全に覆うことになり、該床スラブ４の端部をポリウレタンフォームで覆うことができなくなる。よって、この場合には、上下の防湿部材４２，４２のカバー片４２ａ，４２ａの端部が間隙を介して位置するように該防湿部材４２，４２を上下で離して断熱パネル１２，１２に取り付ける。
Further, in this example, the moisture proof member 42 that vertically divides the rock wool layer 15 in the area covered with the external heat insulating layer 41 is disposed, so that the area not covered with the external heat insulating layer 41 is removed from the rock wool layer 15. It is possible to prevent the moisture that has entered inside into the vicinity of the floor slab 4 from being condensed. The shape of the moisture-proof member 42 is not particularly limited as long as it is a member that is made of metal or synthetic resin, has no air permeability, and is a horizontally long member that can vertically separate the rock wool layer 15. However, as shown in FIG. 5, the cross-section of a cover piece 42a, a mounting piece 42b parallel to the cover piece 42a, and a connecting piece 42c connecting the cover piece 42a and the mounting piece 42b has a substantially Z-shaped cross section. Is preferred. The moisture-proof member 42 is attached to the heat insulating panel 12 with screws or an adhesive (not shown), the cover piece 42a covers the surface of the rock wool layer 15, and the connection piece 42c divides the rock wool layer 15. In this example, the moisture-proof member 42 is arranged with the attachment piece 42b facing the floor slab 4 with the connection piece 42c as the center, but the present invention is not limited to this. Conversely, the cover piece 42a may be arranged facing the floor slab 4, but in that case, the ends of the cover pieces 42a, 42a of the moisture-proof members 42, 42 arranged vertically with the floor slab 4 interposed therebetween. It is necessary to prevent them from hitting each other. When the ends of the cover pieces 42a, 42a of the moisture-proof members 42, 42 arranged vertically above and below the floor slab 4 abut against each other, the cover pieces 42a, 42a completely close the ends of the floor slab 4 from the outdoor side. Therefore, the end of the floor slab 4 cannot be covered with the polyurethane foam. Therefore, in this case, the moistureproof members 42, 42 are attached to the heat insulating panels 12, 12 vertically apart such that the ends of the cover pieces 42a, 42a of the upper and lower moistureproof members 42, 42 are located with a gap therebetween. .
また、本発明においても、第１の外壁構造と同様に、図１４、図１５に示すように、床スラブ４の上方に取り付けられた耐火パネル６２の下部から、床スラブ４の下方に取り付けられた耐火パネル６２の上部にわたって連続し、床スラブ４の端部と、ブラケット２２の少なくとも床スラブ４の端部への取り付け側と、耐火パネル６２の金属板６３の一部と、を覆うポリウレタンフォームからなる外部断熱層４１を設けることで、コンクリート製の床スラブ４の端部及びブラケット２２の周辺の断熱性を高めることが好ましい。尚、図１５は、本例の外壁構造の水平方向の断面図であり、図１４のＬ−Ｌ’断面図であり、図１４は図１５のＭ−Ｍ’切断部の端面図である。
Also in the present invention, similarly to the first outer wall structure, as shown in FIGS. 14 and 15, from the lower part of the fireproof panel 62 mounted above the floor slab 4, it is mounted below the floor slab 4. polyurethane continuously across the top of the refractory panels 62, which covers the end portion of the floor slab 4, at least the attachment side to the end portion of the floor slab 4 of the bracket 22, and a portion of the metal plate 63 of the anti-fire panel 62, was By providing the external heat insulating layer 41 made of a foam, it is preferable to enhance the heat insulating properties of the end of the concrete floor slab 4 and the periphery of the bracket 22. 15 is a horizontal cross-sectional view of the outer wall structure of the present example, which is a cross-sectional view taken along line LL 'of FIG. 14, and FIG. 14 is an end view of a cut section taken along line MM' of FIG.
