Various types of models and moulds are made with plaster. In dentistry, plaster is used to make dental models by pouring the material into dental impressions. In medicine, plaster orthopedic casts are still often used for supporting set broken bones. Plaster is suitable for finishing rather than load-bearing, and when thickly applied for decoration may require a hidden supporting framework.įorms of plaster have several other uses. Plaster can be relatively easily worked with metal tools and sandpaper and can be moulded, either on site or in advance, and worked pieces can be put in place with adhesive. The reaction with water liberates heat through crystallization and the hydrated plaster then hardens. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The most common types of plaster mainly contain either gypsum, lime, or cement, but all work in a similar way. The term stucco refers to plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Plaster is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. A plaster low-relief decorative frieze is above it. Stucco (plaster) reliefs such as this work at the Chateau de Fontainebleau were hugely influential in Northern Mannerism. ![]() For other uses, see Plaster (disambiguation). Other times they reported seeing cracks and crumbling patches of brick, which were inspected by a structural engineer in the months before the collapse.Īn engineer warned on May 24 that a brick facade of the building “looks poised to fall” and “is currently about to topple outward.” A building permit to fix the facade was issued by the city, records show.This article is about the type of building material and "Plaster of Paris". Sometimes there was no heat or hot water in the building, residents said. More than 140 inspections, complaints or permits related to the building had been filed with the city since the beginning of 2019, according to public records. ![]() The building’s residents had complained about safety issues there for years. ![]() Select Structural, an engineering firm that worked on the building, declined to comment.Ĭontractors ignored obvious signs of distress in a brick wall that was under construction, delayed necessary repair work and installed a replacement for part of the wall that was weak and inadequate. “Had a proper shoring and construction phasing plan been implemented during these repairs, the building would not have partially collapsed on May 28, 2023,” the report said.Įngineers and masonry contractors responsible for the repair work “repeatedly misidentified the structural bearing wall as a nonstructural system,” the report added. Two major factors caused the collapse, the report concluded: the removal of bricks from a bearing wall, leaving it compromised, and a failure to properly support the wall during repair work. ![]() Residents and survivors of victims have contended that the building’s owner and the city were negligent in construction work and oversight. Two companies with expertise in engineering and construction were hired to investigate the causes of the collapse and present their findings to city officials. The 116-year-old structure, once a hotel, was plagued by flaws that went unaddressed, even after concerned residents who rented inexpensive apartments in the building repeatedly raised alarms. Three people were killed in the sudden and devastating collapse at the apartment building on Main Street in downtown Davenport, a city of 100,000 people on the Mississippi River about halfway between Des Moines and Chicago. The partial collapse of a six-story brick building in Davenport, Iowa, in May was caused by construction errors made during repair work in the days before the disaster, investigators concluded in a 113-page report commissioned by the city.
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