The V-roof on the barracks of Fort Zachary Taylor Historic State Park in Key West, Fla., directed rain into seven deteriorated cast-iron drainpipes. Water running through cracks and breaches in the 5-inch lines kept the massive masonry rubble walls damp and caused structural problems. As the 166-year-old piping disintegrated, it spalled and expanded, causing the masonry to fall off.The park brought in David Salay, design engineer for Bender and Associates Architects in Key West, to rehabilitate the pipe without cutting into or demolishing the walls. Salay researched trenchless options on the Internet, then specified cured-in-place pipe. Engineered Lining Systems, a
