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.
Work Ethic and Motivation. Introduction. Communism is often criticized for its inability to create a sustainable economic system where people have incentive to perform efficiently and act ethically in their work. The abolishment of private property is often cited as a major cause for laziness and corruption.