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Recently in Russia about 100% of buildings of an oil and gas complex are built with use triplex a sandwich of panels (S.P). Almost all these buildings are explosive and increase in their exploisure-resistance requires application of easily thrown off or safety designs. A sandwich of the panel is an ideal applicant for a role of safety designs according to the weight characteristics. Except inertial properties extremely important characteristic is opening pressure. This size remains acritical in view of a variety of their sizes, thickness of metal sheets, a variety of their fastening to metal designs. In work opening pressure at explosion for a sandwich of panels of 2×1,2 m in size for various options of fastening is experimentally received. We suspect that load of one knot of fastening does not depend on the panel sizes, only on the knot device. For various ways of fastening design pressure of opening in case of a normal distribution of durability of clusters is defined. The criterion for assessment of effectiveness of the panels used as safety designs is received. This criterion determines the maximal pressure upon dive during opening. The received criterion confirms effectiveness a sandwich of panels as a safety design

Features of fire and explosion safety of buildings from a sandwich of panels