The first pedestrian bridge to cross the Liffey, it was a welcome relief for Dubliners accustomed to vying with horse, carriage and cart in an era before any demarcation between vehicle and man on the public highways or bridges. It retained its position as the only pedestrian bridge tospan the river until the opening of the Millenium Bridge in 1999. World renowned as the Ha’penny Bridge, in reference to that toll, but officially the Liffey Bridge since 1922, it has variously been known as the Wellington, Metal, Triangle or Iron Bridge. The Bagnio Slip, near an infamous brothel, is no more, the crossing now takes pedestrians from Merchant’s Arch to Liffey Street on the north side.

The bridge has a 43 metre span, is 3 metres in width and rises an elegant 3 metres above the river. The superstructure is composed of three arch ribs, each formed in six segments. Seen today in the original off white colour, it has, in the past, been dignified with less complimentary tones - black and silver - and covered in advertising hoardings. Dublin City Council undertook an extensive refurbishment of the bridge in 2001 with engineers and conservationists working together on the award winning restoration.

Sumber :
http://www.bridgesofdublin.ie/bridges/hapenny-bridge