To expand the home, the architects built a small concrete plinth and topped it with a larger steel-floor addition to house the bedrooms and bathrooms.  Photo 12 of 17 in Before & After: A Glass Bridge Links an Alabama Midcentury to a Strategic Expansion

Before & After: A Glass Bridge Links an Alabama Midcentury to a Strategic Expansion

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To expand the home, the architects built a small concrete plinth and topped it with a larger steel-floor addition to house the bedrooms and bathrooms.