The labor required to build a chimney depends on the thickness of the
walls, the height, and the amount of cutting to build in specialties,
provide offsets, etc. In general, a mason will take 16 hours with 8 hours
of laborer's help to lay 1,000 brick. On this basis, 16 by 6.1 = 97.6
hours of mason's time and 48.8 hours of laborer's time will be required.