Building construction. The construction of the homes and buildings in which people live and work has been a major industry ever since early human beings first made huts of sticks, mud, and rocks. Methods of building construction have been constantly improved since those first crude structures.
India's Taj Mahal required 20,000 workers and took from 1632 until 1653 to complete. Modern skyscrapers are usually completed within two to four years. Prefabricated buildings, with their various parts made in factories by assembly-line methods, can often be put together within a day or two. Buildings are built as places of residence; for business offices, manufacturing, and storage; and for worship, education, and other purposes.
