REINFORCED-CONCRETE PANEL-CASE Russian patent published in 2001 - IPC

FIELD: construction engineering; panel-cases in reinforced concrete coverings. SUBSTANCE: panel- case has intermediate curvilinear rib outlined over circle radius and transversal ribs with double- ended inclination from their center to ends; it is installed along panel span within light-aperture limits. Cross sectional area of intermediate curvilinear rib has upper part with double-ended front laps doubling its height on parts of dihedral ledge for rigid connection with them on top; crests of upper part whose top is outlined over same circle radius as top of laps; double-ended spreading of upper parts of intermediate curvilinear rib which increases from start of laps towards center of light-aperture and from bottom to top. Structure formed in this way provides for optical transmission capacity of dihedral ledge, recovers its dihedral dome function, and enhances of cross sectional area. EFFECT: reduced material input; enhanced stiffness and bearing capacity of panel-case. 4 cl, 10 dwg