roof spalling
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art conservation and restoration — Maintenance and preservation of works of art, their protection from future damage, deterioration, or neglect, and the repair or renovation of works that have deteriorated or been damaged. Research in art history has relied heavily on 20th and… … Universalium
W. E. B. Du Bois Library — General information Type Research Location Amherst, Massachusetts 01003 United States Construction started 1972 Completed 1974 … Wikipedia
Reinforced concrete — is concrete in which reinforcement bars ( rebars ), reinforcement grids, plates or fibers have been incorporated to strengthen the concrete in tension. It was invented by French gardener Joseph Monier in 1849 and patented in 1867.[1] The term… … Wikipedia
Waco siege — The Mount Carmel Center in flames during the assault on April 19, 1993 Date … Wikipedia
ISU-152 — The first ISU 152, in the courtyard of Factory No. 100, 1943 Type Self propelled gun Place of o … Wikipedia
tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
Tiger II — For the aircraft also known as the Tiger II, see Northrop F 5. Panzerkampfwagen Tiger Ausf. B … Wikipedia
Tower block — High rise redirects here. For other uses, see High Rise (disambiguation). A high rise residential apartment building in Hong Kong … Wikipedia
Rebar — This article is about reinforcing bar. For the company, see Rebar (Taiwan). For the art group, see Rebar art and design studio. A tied rebar beam cage. This will be embedded inside cast concrete to increase the tensile strength of the concrete. A … Wikipedia
Chimney — For other uses, see Chimney (disambiguation). Smokestack redirects here. For the 1963 avant garde jazz album, see Smokestack (album). The world s tallest chimney, of GRES 2 in Ekibastuz, Kazakhstan. A chimney is a structure for venting hot flue… … Wikipedia
Ironclad warship — An ironclad was a steam propelled warship of the later 19th century, protected by iron or steel armor plates. [Hill, Richard. War at Sea in the Ironclad Age ISBN 0 304 35273 X; p.17] The ironclad was developed as a result of the vulnerability of… … Wikipedia
