On April 15, opposing sides in a debate over the fate of a deteriorating, nine-year-old Seattle apartment tower presented their positions regarding the building’s future safety to Seattle’s Dept. of Planning and Development (DPD). McCarthy Building Cos. maintains the 26-story McGuire Apartments, with its corroding post-tensioned slab system, can be economically fixed. The owner disagrees. Photo: Kennedy Associates Contractor and owner at odds about ‘sick’ tower’s cure. + Image Source: Post-Tensioning Institute Post-tensioned slab The steps to post-tensioning are as follows: Place the tendons and nail anchors to the formwork, cast the concrete slab, remove the formwork, stress and anchor
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.