FIELD: bridge construction; may be used, mainly, in frameworks of railroad bridges with plate of ballastless bridge floor. SUBSTANCE: bearing unit includes bearing member installed between framework plate and upper flange of longitudinal beam and prestressed tie-rod passed through coaxial holes in plate, bearing member and upper flange of longitudinal beam. Tie-rod is located in cross-section of bridge framework on sections of joined members outer with respect to vertical axis of longitudinal beam. Beam member is made in the form of monolithic block from reinforced flexible material with reducing rigidity from one edge to the other one. Reducing rigidity is attained due to reduced density of reinforcement in bearing member from its one end to the opposite end. Bearing member is installed in cross-section of bridge framework so that its rigidity decreases in direction from the outer edge to internal edge with respect to vertical axis of longitudinal beam. EFFECT: simplified design and provision of operating reliability of bridge framework. 3 cl, 3 dwg
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