| Bridge Name: |
Barstow Overhead
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| Location: |
Barstow, California
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| Description: |
The Barstow Overhead is an 1164’ long structure, constructed circa 1929, that carries First Street over a railroad yard and several local streets in the City of Barstow, California. The bridge structure consists of three 175’ steel truss spans, three, 65’ to 76’ long, steel plate girder spans, and 23 timber trestle spans at the north and south approaches. Reinforced concrete piers on spread footings support the main truss and plate girder spans, while the 12x12 timber columns of the approach spans sit on individual concrete pedestals. A performance criterion of no collapse after a peak rock acceleration of 0.72g was stipulated for the retrofit design. Retrofit measures included: installing seismic isolators between the piers and trusses, strengthening the piers and footings at the ends of the truss and plate girder spans, and enhancing the transverse and longitudinal bracing, as well as the concrete pedestals, of the timber trestles.
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| SCOPE: |
Independent check of the seismic retrofit strategy, designs, calculations and contract plans.
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| Cost: |
N/A
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| Owner: |
The City of Barstow
|
| References: |
CALTRANS
Mr. Andrew Tan
P.O. Box 942874
Sacramento, CA 94274
(916) 227-0699
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| End Date: |
1998
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Bridge Design Experience
Bridge Construction Experience
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