ROOF Russian patent published in 2006 - IPC E04B7/00 

FIELD: building, particularly roofs formed of reinforced concrete panels.

SUBSTANCE: roof comprises panels and trapezoidal steel sheet inclined with respect to panel bases. Reinforced concrete walls of lower panels extend at an angle to bent sheet sides. Extension formed in one lower panel is arranged in depression made in another lower panel. Located in upper reinforced concrete panels is steel sheet. Walls of upper panels lay upon lower panels. Walls of two adjacent lower panels are arranged between walls of one upper panel. One upper panel is arranged so that depression thereof is above extension made in another upper panel. Water falling on upper panels flows down along the walls towards lower panels and then drains between the walls into pipe communicated with sewage system. Steel sheet located in reinforced concrete panels does not corrode and does not leak to prevent roof leakage.

EFFECT: increased tightness without water-tight coating usage.

7 dwg