PRESTRESSED TRUSSED GIRDER Russian patent published in 2002 - IPC

FIELD: building structures, structures of covers of buildings and engineering works. SUBSTANCE: proposed girder can also be used in the capacity of separately standing bearing systems of special assignment , for example, as cross-bars of stiffening transverse beams on electrified railways. Prestressed trussed girder includes beam-strut coming in the form of sections, column of spatial strut frame with guides on ends into which tie-rods are freely passed. Tie- rods are anchored on butts of beam-strut. Sections of beam-strut are manufactured in the form of hollow bars with plugs and thrust flanges on ends. Through inserts with columns of spatial strut frame attached to them are installed between butts of sections of beam-strut. Cores which side surfaces carry locating arms with spring members are placed in internal spaces of sections of beam-strut and through inserts. EFFECT: diminished dynamic loads in members of system under action of outside pulse loads and as result reduced usage of materials. 4 dwg