In the case of a truss bridge, a post-tensioned slab bridge, or a box girder bridge the sections are often floated to the bridge and then lifted into place by cranes on barges or cranes sitting over piers.
The very good reason why the word communism is so commonly associated with these revolutionary, anti-liberal, anti-democratic Marxists is that political parties with communist in the name were pretty much invariably of that bent throughout the 20th century, whereas parties called socialist or social democrat or labor varied enormously in ideology.
With the decline of the Communist governments in Eastern Europe from the late 1980s and the breakup of the Soviet Union on December 9, 1991, Communism's influence has decreased dramatically in Europe.lthough many forms of communism, such as Leninism, Trotskyism and Luxemburgism, are based on Marxism and Karl Marx is sometimes known as the father of Communism , non-Marxist versions of communism (such as Christian communism and anarchist communism) also exist.