LIGHT-SPAN STRUCTURE Russian patent published in 2020 - IPC E01D2/00 E01D6/00 

FIELD: construction.

SUBSTANCE: invention can be used in creation of viaducts, ferrying through small rivers, ravines, bridge carrying supports for passage through cars and railways. Light-span structure contains at least two parallel flat longitudinal trusses including, each, lower and upper belts from longitudinal load-bearing elements connected by vertical posts – half-frames. Lower and upper longitudinal load bearing elements of each truss are interconnected by transverse lower and upper load bearing horizontal bridges. In the cross-sections of the light-span structure, the vertical posts – half-timbered frames of the trusses together with the horizontal transverse upper and lower crosspieces between the trusses form closed bearing portal frames. On the lower bridges there are additional longitudinal elements – longitudinal girders of the lower belt. Additional lengthwise load-bearing elements are secured to upper webs – longitudinal girders of upper belt with total area of cross section equal to 90 % of cross-section area of additional lower longitudinal girders.

EFFECT: simplification of track structure construction, reduction of material consumption at increase of carrying capacity and rigidity.

4 cl, 11 dwg