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The top and bottom chords of the trusses were
repaired. Jacking bents (transverse frame of bridge designed to support
either vertical or horizontal loads) and timber blocking bents under the
chords of the trusses were installed. |
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The jacks were then raised to reach the desired
height. Block trusses at these elevations were adjusted shims until timber
blocking bents were tight against the chords. |
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The bridge was jacked up using the support
seen at the bottom of the bridge. Blocking was added as required. |
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Here is a view of the bridge from below with
the jacks in place. |
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Here is one of many cables between the chords
used to remove the 5" bow (or sideways leaning of the bridge) in
the bridge. |
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As the diagonal cables were adjusted that ran
between the upper and lower chords, the 5" bow was eliminated. |
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Joints were bolted back together, and shims
were added where necessary. |
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A portion of the existing abutment was replaced
with reinforced concrete and faced with rubble masonry. The abutments
are 99' 7" apart. |