Construction
Construction is the process of constructing a building or infrastructure. Construction differs from manufacturing in that manufacturing typically involves mass production of similar items without a designated purchaser, while construction typically takes place on location for a known client. Construction as an industry comprises six to nine percent of the gross domestic product of developed countries. Construction starts with planning, design, and financing; it continues until the project is built and ready for use.
Steel
Steel is an alloy of iron and carbon and other elements. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
Steel
And he sang: "Hurra for my handiwork!"
And the red sparks lit the air;
Not alone for the blade was the bright steel made;
And he fashioned the first ploughshare.
Charles Mackay, Tubal Cain, Stanza 4, in Hearty Staves of Heart-Music (1858) edited by John Erskine Clarke, p. 82