ROUND FLOOR SLAB Russian patent published in 2011 - IPC E04B5/32 

FIELD: construction.

SUBSTANCE: round floor slab comprises grid of ribs and upper layer. Grid of ribs rests against perimetre columns and stiffening core of building round in plan. Slab is arranged as monolithic with reinforcement frame from longitudinal and transverse reinforcement. Grid is formed with crossing curvilinear ribs. Ribs adjoin stiffening core along tangent and tie diametrically arranged columns. In columns the ribs are joined and arranged in plan as having lenticular contour, to form a compacted area near stiffening core. Upper monolithic layer of slab is equipped with reinforcement grid. Ribs are equipped with longitudinal upper and lower reinforcement rods. Upper reinforcement rods of ribs are connected to reinforcement grid. In units of ribs crossing there are transverse frames that connect upper and lower longitudinal reinforcement.

EFFECT: reduced material intensity and higher rigidity in case of bending and twisting loads by rational distribution of material.

5 cl, 6 dwg