Spotted anything unusual on your way up Bath Road recently? Is there a secret plan afoot to reconstruct the Forth Bridge?
Rook Lane Arts are delighted to announce that a full-size replica of one of the struts of the Forth Bridge has landed on the Rook Lane Chapel lawn in honour of the new ‘Benjamin Baker: Bridging the World’ exhibition & events.
This is a true to size representation of the lower member of the cantilever arms of the Forth railway bridge.
The member has to withstand huge compressive forces and was therefore designed as a tubular section to be better able to resist buckling.
This section of tube is 12 feet in diameter. It is a monocoque construction, using 10 longitudinal I section beams, annular ring sections and curved steel plates forming the outer skin.
It was the first significant bridge to use steel as its main component – 65,000 tons in total.
The tube sections were cut, drilled and pre-assembled on the banks of the Forth to ensure all pieces would fit. The components were dismantled, loaded into boats, taken out into the estuary and lifted into position by steam cranes fitted to the part completed cantilever arms.
They were then riveted in their final positions. Around 7 million rivets were used.