Pont La Fayette, Reinforced concrete truss bridge in the 10th arrondissement, Paris, France

Pont La Fayette is a reinforced concrete truss bridge carrying Rue La Fayette over the tracks of Gare de l'Est in the 10th arrondissement. Its two lateral trusses, about 10.4 m high, have X-shaped diagonals forming diamond openings; the deck is 20.40 m wide with four lanes and wide sidewalks. The bridge is 149 m long and crosses the tracks at a skew, so its two spans are irregular quadrilaterals.

The first bridge on the site, built in 1882, was 79 m long. Rising traffic at Gare de l'Est, from 8.5 million passengers in 1900 to 25 million in 1925, pushed the track count from 16 to 30, so a 149 m skewed replacement was built by the firm Monod between July 1927 and September 1928. Albert Caquot designed two lateral reinforced-concrete truss girders of unequal span; it was inaugurated on 20 October 1928 by minister André Tardieu.

The bridge takes its name from Rue La Fayette, the street it carries over the tracks; the street honours the Marquis de Lafayette. Its concrete truss, with profiled chords and diagonal braces, is visible from the platforms and from the neighbouring Pont de l'Aqueduc, a steel arch bridge further north on Rue de l'Aqueduc.

The bridge carries the Rue La Fayette between Rue de l'Aqueduc and Rue Philippe-de-Girard, with four traffic lanes and wide pavements on both sides. The nearest metro stations are Gare du Nord, Gare de l'Est and Château-Landon. The deck runs straight but crosses the tracks at an oblique angle, so the two spans are unequal.

The bridge's two lateral truss girders have unequal spans because the central pier could not be moved: 71.87 m and 59.42 m on the west field, 76.85 m and 64.40 m on the east. At its completion in 1928 it held the world record for continuous reinforced-concrete truss girders.