Detached shelters are completely or partly underground and are designed to withstand blast on the order of 100 to 150 pounds per square inch. They may have space for from 150 to several thousand persons and are equipped for long-term occupancy. They are to be used as industrial, public, and elite shelters. (See figs. G-9 and G-10, pp. 278 and 279.) SUBWAY SHELTERS The Soviet authorities have officially designated the subways as shelters and are believed to have adapted them for this purpose. There are at present subway systems in Moscow, Leningrad, and Kiev. The stations and platforms are in most instances over 100 feet deep. (See fig. G-11, p. 280.) I believe that many of the subway stations are equipped with sealing or blast doors concealed at the entrances to the station platforms. Here are some photographs taken by travelers of what I believe to be such doors. This is one type which is concealed in the floor at the entrance of the platform, and will lock in place behind these metal sheets, which are, in most cases, the only nondecorative part of the station, everything else being gilt and wrought iron. (See fig. G-12, p. 281.) |