It affords facilities for the transport of logs by means of booms above Minneapolis, and is navigable below St Paul; being half a mile broad where it reaches the border of the state at Hastings.
The completion of the latter line precipitated one of the most extraordinary of American railway wars and land booms, which resulted in giving southern California a great stimulus.
The girders are of the Whipple Murphy type, but with curved top booms. The bridges.
In bottom booms and diagonals, 6 o tons in top booms, 5.
For practical purposes it is accurate enough to consider the booms or chords as carrying exclusively the horizontal tension and compression and the web as resisting the whole of the vertical and, in a plate web, the equal horizontal shearing forces.
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