Chicago : Engineering and Contracting Pub. Co. · leaf 261
t. of open cut ap- placed at each stiffener angle, radiating froma cast-steel ring at the center of the tube tothe angle. These rods were bolted to theangle at points corresponding to the hourmarks of a clock, passed through correspond-ing holes in the ring, and were made rigid byturning up a nut… … Fig. 1—Section of Subaqueous Portion of the Detroit River Tunnels. proach. and an easterly approach tunnel 6,-449.2 ft. long, including 2,900 ft. of open cut.As the land and river units comprising thewhole tunnel present different features eachwill be described in a separate article of whichthis is…
Buildings
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