... on Erectionbypushingand rolling over of girders, Mr. Seyrig stated that thesystem was only applicable to bridges of the continuous-girder class, comprising a t least two spans. He must have forgotten for the moment one of the most-wxent and interestinegxamples of this mode of erection, viz., the bridge across...

...T SEYRIG; A BACHE © Thomas Telford and ICE 1881 METHODS ERECTION IRON BRIDGES CONSTRUCTION METALS STAGING FLOATING GIRDERS VIADUCTS TEMPORARY RIVERS IRONWORK PERMANENT MATERIALS TUBES LIFTING CONTINUOUS SPANS PROTRUSION ROLLING OVER ROLLERS OVERHANG BUILDING OUT...

..., or whatever was used for giving motion to the bridge, so thathestrainsmight be self-contained. There was another method of rolling bridges t o which reference had not been made- a compromise between rolling over and floating. The girder was first thrustoutabout a third of the way across, a vessel was brought...