Construction has come a long way from those ancient days of manual labor doing everything. Hammers and wrenches are still the norm in many trades but equally important are the power tools—corded, gasoline-fueled, or battery operated. At the extreme, earth moving is no longer a HOD (human-with-shovel) endeavor and few bricks are raised to the top of a tall building by a hod carrier. There is heavy equipment designed for that and employed by most general contractors.
From the steam operated equipment of the 1800s to the internal combustion engines of the 20th century, power to do the heavy work
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