In the previous report, a new method of composing Sandwich Curtain Wall was proposed,and the previous papers dealt with the experimental study on composing the Sandwich Curtain Wall at both an inner and outer wall of bui1ding,The latter is composed in the following way. 1. The structural mullion is attached to the structural frame. 2. The Steel-bar-grid is attached to the structural mullion. 3. This grid is sandwiched between the special concrete panel and the aluminum panel attached to the Urethane Foam Panel (U. A. panel). 4. These two are combined by concrete set between them. The present paper dealt with the experimental study of lightening, rigidity, strength and refractoriness of the Lightweight Sandwich Curtain Wall at an outer wall of building. The resuIts obtained are as follows : 1. This method of composing the outer wall of bui1ding is easy,exact and rapid. 2. The Sandwich Curtain Wall of which the lightweight concrete panel and the U. A. panel are combined together by lightweight concrete has the refractoriness enough for an hour. 3. The weight of this outer curtain wall sandwiched by both lightweight concrete panel and lightweight concrete is only 85.71 Kg per unit area, which is about 22 per cent of the reinforced concrete wall,and this value is about 68 per cent of wall sandwiched by both concrete panel and concrete. 4. The rigidity of this outer curtain wall is about 15.6 % and strength is about 80% of Wall sandwiched by the concrete panel and the U. A. Panel.departmental bulletin pape
