By the time they leave on Jan. 28, the 10 U.S. structural engineers sent to Haiti to assess the condition of buildings slightly damaged in the magnitude-7 earthquake will have done about 100 surveys. However, some 100,000 buildings still will need to be inspected so that the sound structures can be reoccupied, say local sources. Photo: Daniel O’neil, PADF High-end Oasis development, under construction, is undamaged, unlike an older completed building nearby (foreground). Photo: Eduardo Fierro, BFP Engineeers Inc. Light-metal roof of reinforcing-steel plant collapsed during the quake because it was not properly connected to the building’s reinforced-concrete columns. Related
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.