REINFORCED CONCRETE RAFTER Russian patent published in 1997 - IPC

FIELD: construction engineering. SUBSTANCE: this is used in erection and reconstruction of garret and mansard roofs of dwelling and public buildings, preferably low-storied ones. Reinforced concrete rafter is made up of joined together small-size U-shape units located with their ribs upward, extreme supporting trapezoidal units of rectangular cross-section, and prestressed reinforcement anchored in extreme supporting units. Longitudinal prestressed reinforcement is provided with pair of preliminarily compressed anchors and is located between ribs of U-shape units and in through-holes of supporting units. Anchors with bifurcated washers are seated in recesses of supporting units. EFFECT: high efficiency. 7 dwg