ROLLED SHAPE OF REINFORCEMENT STEEL Russian patent published in 2007 - IPC B21B1/16 

FIELD: reinforcing of ferroconcrete structures such as sleepers, beams and so on.

SUBSTANCE: shape is made of round cross section rod and it has at three sides three lengthwise rows of sickle type depressions. Lengthwise axes of said depressions are mutually parallel and they are oriented by angle 40 - 50° relative to lengthwise axis of rod. Lengthwise axes of depressions of two rows are parallel to, of third row are inclined by angle 80 -100° relative to axes of depressions of two previous rows in order to eliminate shape stratification, twisting of it at manufacture and its screwing out of concrete at exploitation. Lengthwise section along rod axis never includes more than two rows of depressions.

EFFECT: simplified manufacturing process, enhanced engagement with concrete at keeping high strength of reinforcing member in the result of rolling shape with normalized geometry parameters.

4 cl, 4 dwg