MODERN STEAM PRACTICE . 1040 together , and under this a wrought - iron channel bar ( Fig . 726 ) , 6 inches by % inch , with flanges turned downvvards 2 inches deep , and weighing 30 lbs . to the yard . These … Fig . 726 . — Lower Chord and lower chord asunder . Tension Bolt . Between the top and bottom chords of the truss is a series of diagonal braces and vertical tie bolts , binding the two members firmly together through the oak cap and channel bar at top and bottom ( Fig . 724 ) . At the middle of…
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