COVER Russian patent published in 2009 - IPC E04B7/08 

FIELD: construction.

SUBSTANCE: invention refers to the sphere of construction, in particular - to cover arrangements. The cover consists of a central element and a wrap-around shell resting on the central element and on the support members arranged along the perimeter. The central element is mounted onto the central support member and composed of individual radially arranged support troughs broadening in the peripheral direction. The support troughs are bottom down oriented and joined together via radial sections. The central element is basically a negative-curvature shell. The wrap-around shell is basically of positive curvature. The wrap-around shell is composed of individual radially arranged base troughs broadening in the peripheral direction. The base troughs are bottom down oriented and joined together via radial sections. The base troughs inside ends rest on the support troughs outside ends. On the central element and the wrap-around shell from the underside there is a protective intensifying screen mounted. The screen is positioned within the bottom tangential surface of the central element and the wrap-around shell. The screen forms radially arranged scavenge channels.

EFFECT: improvement of the structure corrosion resistance and durability combined with load-bearing capacity enhancement, installation process facilitation and environmental friendliness.

12 cl, 19 dwg