Installation of steel girders in the new wing of Mount Wilson Observatory's office building, Pasadena. Four unidentified construction workers are seen throughout the concrete brick frame of the new wing. The construction worker in the foreground is standing to the right of a steel girder. The concrete floor of the new building can be seen. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Office buildings--California--Pasadena--Photographs Office buildings--Design and construction Girders Steel, Structural Steel framing (Building) Concrete construction Walls Construction workers--United States Ladders Construction equipment Photographic prints. (gmgpc)
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