Image:BandedRetroColumn.jpg

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Seismic retrofit of rectangular column by elliptical steel enclosure with concrete grouting on left subimage. Unmodified column on right. In this location, not all columns required modification to obtain sufficient seismic resistance in the overall structure.

BART Rockridge Station western parking lot under State Route 24 eastbound. Two separate BART track viaducts and westbound 24 in background. Sept 8, 2004. Image by User:Leonard G..

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current05:18, 9 September 2004800×745 (90 KB)Leonard G. (Talk | contribs) (Seismic retrofit of rectangular column by steel enclosure with grouting. Unmodified column on left. {{cc-sa}})

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