BRIDGES.

Progress, Volume II, Issue 6, 1 April 1907, Page 210

BRIDGES.

The notable fact of the year is that excellent progress has been made in the erection of the great railroad and highway

cantilever bridge across the St. Lawrence River near Quebec. Although this structure is by no means the largest bridge in respect of its overall length, it will contain the largest single span ever erected, the main span over the river measuring 1,800 feet between the two toweis. The total length from centre to centre of anchorage piers is 2,800 feet, made up of two 500 loot anchor spans and two 5621- feet cantilever arms, extending over the river and carrying between them a central suspended span of 675 feet. The depth of the trusses over the main piers is 350 feet. The floor system will accommodate two steam railroad trucks, two electric car tracks, two highways for vehicles, and two sidewalks. The bridge is more than half erected, and will be completed probably during the present year.