Hammersmith Bridge

Hammersmith Bridge is a suspension bridge that crosses the River Thames in west London. It links the southern part of Hammersmith in the London Borough of Hammersmith and Fulham, on the north side of the river, with Barnes in the London Borough of Richmond upon Thames, on the south side of the river. The current bridge, which is Grade II* listed and was designed by civil engineer Sir Joseph Bazalgette, is the second permanent bridge on the site, and has been attacked three times by the IRA.

The bridge was closed indefinitely to all motor traffic in April 2019 after cracks were discovered in the bridge's pedestals. The closure was extended to pedestrians and cyclists between August 2020 and July 2021 when limited use resumed. Further work and intermittent closures continued until April 2025, when the resurfaced wooden roadway was reopened to pedestrians and cyclists.

A group of local people proposed a new bridge at Hammersmith rather than detouring to either Kew Bridge or Putney Bridge to cross the river. The construction of the bridge was first sanctioned by an act of Parliament, the Hammersmith Bridge Act 1824 (5 Geo. 4. c.cxii), on 9 June 1824, which established the Hammersmith Bridge Company. Work began on site the following year, and the bridge was opened on 6 October 1827. Construction of the bridge cost some £80,000 (equivalent to £7.3 million in 2023).

It was the first suspension bridge over the River Thames and was designed by William Tierney Clark. A further act of Parliament, the Hammersmith Bridge Act 1828 (9 Geo. 4. c. lii) was obtained in 1828. The acts also included powers to acquire land by compulsory purchase in order to build approach roads, and required the company to purchase the entire Barn Elms estate (the surplus land was subsequently sold).

Hammersmith Bridge Road in Hammersmith was also constructed with the bridge, together with Upper Bridge Road (now Castelnau) and Lower Bridge Road (now Lonsdale Road) in Barnes. It was operated as a toll bridge, with the toll house located at the Hammersmith end of the bridge.

The bridge had a clear water-way of 688 feet 8 inches (209.91 m). Its suspension towers were 48 feet (15 m) above the level of the roadway, where they were 22 feet (6.7 m) thick. The roadway was slightly curved upwards, 16 feet (4.9 m) above high water, and the extreme length from the back of the piers on shore was 822 feet 8 inches (250.75 m), supporting 688 feet (210 m) of roadway. There were eight chains, composed of wrought-iron bars, each five inches deep and one thick. Four of these had six bars in each chain; and four had only three, making thirty-six bars, which form a dip in the centre of about 29 feet (8.8 m). From these, vertical rods were suspended, which supported the roadway, formed of strong timbers covered with granite. The width of the carriageway was 20 feet (6.1 m), with two footways of 5 feet (1.5 m). The chains passed over the suspension towers, and were secured to the piers on each shore. The suspension towers were built of stone, and designed as archways of the Tuscan order. The approaches were provided with octagonal lodges, or toll-houses, with appropriate lamps and parapet walls, terminating with stone pillars, surmounted with ornamental caps.

In order to increase profits, the company built a floating steamboat pier to the downstream side of the suspension pier closest to Barnes.

By the 1870s, the bridge was no longer strong enough to support the weight of heavy traffic and the owners were alarmed in 1870 when 11,000 to 12,000 people crowded onto the bridge to watch the University Boat Race, which passes underneath just before the halfway point of its 4+1⁄4-mile (7 km) course.