Design Built Mechanical Inc. is a mechanical contracting firm, specializing in a number of services. These include: construct ... ion and installation of mechanical systems, plumbing, heating, ventilation & air conditioning, piping, and structural steel, among others. Its crew includes pipefitters, welders, millwrights, machinists, steel workers, ductwork fabricators, electricians, carpenters, and technicians, among other tradesmen. read more