Ha’penny Bridge
The Ha’penny bridge, Dublin was opened to the public in May 1816 and spans 42 metres across the river Liffey. Metalock Engineering UK were asked to undertake all repairs to the cracked cast iron sections. Metalock carried out a series of magnetic particle inspection checks on various critical components and, using its Metalock metal stitching techniques repaired the damaged parts.
The bridge is a List 1 structure in the Dublin Corporation Development plan and takes its name from the Ha’Penny toll collected between its construction in 1816 to the toll ending in 1915. Although it’s present official name is the Liffey Bridge, it was originally the Wellington Bridge and comprises an assembly of elliptical arch ribs. These were most probably cast in the Coalbrookdale Works in Shropshire from a design attributed to Thomas Telford.
Ha’penny bridge was closed for the restoration and a one-piece Bailey bridge located alongside for pedestrian crossing. The deck was removed and new sections fabricated to match the bridge’s distorted elliptical shape. New ductile iron ornamental railing sections have also been cast. The project included repainting in its original off-white colour.
Most of Metalock’s work involved tie-rod end caps, 43 of which had cracks and were repaired, and cracked diaphragm rib plates. Additionally, Metalocking was used to repair construction webs and install new corbel sections to replace those that had broken off over the years. Most of the damage to the components that needed repair had been caused by expansion due to corrosion from moisture ingress following the breakdown of joint sealing materials.
Due to the significance of the bridge as an icon of the City, great care and attention was given to the restoration process, as much of the original material as possible was either repaired or refurbished.
To preserve and protect our rich architectural heritage…
Please contact us on +44 (0) 2476 338205 or email
sales@metalock.co.uk for more information or scan for your no-obligation quotation.
www.metalock.co.uk | 9
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20