REINFORCEMENT ITEM FOR REINFORCED CONCRETE BOARD AND METHOD TO REINFORCE REINFORCED CONCRETE BOARD Russian patent published in 2012 - IPC E04C5/65 

FIELD: construction.

SUBSTANCE: reinforcement item comprises lower and upper reinforced grids of rectangular shape, made of longitudinal and transverse reinforcement rods and additional reinforcement elements fixed to rods by welding. Reinforcement rods of lower and upper reinforcement grids are installed in one vertical plane accordingly and form longitudinal and transverse vertical rows, in the transverse row two reinforcement rods - lower and upper ones, and in the longitudinal row at least two reinforcement rods, they are tightly pressed to each other along the length and joined to each other by means of welding. Welding is done by flank welded seams, length of which makes from two to three diametres of joined reinforcement rods, geometric centres of welded seams are arranged on a single straight line stretching along the angle of 45-60° to the axis of rods to form a reinforcement truss, which stretches in light between the lower and upper transverse reinforcement rods, in points of crossing of transverse reinforcement rods and longitudinal reinforcement rods, forming a reinforcement truss, the lower and upper reinforcement grids are connected by welding, forming as a result a single spatial reinforcement item. The method is proposed to reinforce reinforced concrete items and their versions of realisation.

EFFECT: increased strength and stiffness of a reinforced concrete board or a beamless floor slab, simplified technology of their reinforcement.

4 cl, 4 dwg