Posts Tagged: bridge
Posted by Sarah Cole on May 26, 2011 in Civil Engineering
The deck is supported by McAlloy tie bars running up to a vertical A frame then onto raking A frames with the tie bars being held down with a 50tonne counter weight in the form of a millstone. The A frame stays are on the west bank of the river, between the river and the mill leat. Access was a major factor in erecting the masts and deck section.
The bridge was erected by installing the 2A frame masts and fixing the back...
Posted by Sarah Cole on May 19, 2011 in Civil Engineering
It also included demolishing the existing footways and construction of new steel columns.
The original lifting span was of steel and timber construction and was just 6m wide; the new span was fabricated steel section 7m wide plus two footways 1.5m wide and designed to take full HA and HB loadings. As the steel lifting girders were to be maintained along with the original lifting mechanism, the new section had to be of similar weight but strong enough to take the...