GIRDERLESS CEILING Russian patent published in 2010 - IPC E04B5/43 

FIELD: construction.

SUBSTANCE: ceiling comprises reinforced concrete slab. Slab is reinforced along axes of column grid with armature elements of upper and lower zones of spatial frames of conventional crossbars. Above columns, slab is reinforced with mutually perpendicular crossing armature elements in upper and lower zones. Ceiling is equipped with armature elements of conventional crossbars installed along diagonals of slab between columns. Armature elements are arranged as a whole for the whole length of column grid diagonals and are installed in upper and lower zones. In area of conventional crossbars frame crossing in spans, in lower zone, there are radial armature elements installed, which are joined to each other by means of slab in single plane. Radial elements are installed at the level of upper edge of armature elements of lower zone of conventional crossbars frames. Above middle and extreme columns in upper and lower zones there are radial armature elements installed, being joined in one plane.

EFFECT: high bearing capacity and produceability of works performance.

5 dwg