E - Fixed Constructions – 04 – F
Patent
E - Fixed Constructions
04
F
227/2
E04F 11/14 (1980.01)
Patent
CA 1048461
ABSTRACT OF THE DISCLOSURE A double helical earthquake and fire escape structure for multiple story buildings formed mainly of a plurality of prefabricated sections of precast concrete. Two identi- cally formed upper sectional units and two identically formed lower units are arranged in facing relationship to each other for each floor of the building. Complementary portions of the assembled units combine to form a pair of oppositely disposed entrances on each floor leading to two separate helical slides arranged about a separately formed central circular smokestack. The units are provided with steel members adjacent their edges which are connected to- gether and secured to a surrounding supporting steel framework. Two additional smokestacks formed within the corners of the assembled units may also be used as shoe drops. -1-
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