Engineering | Construction | Man-Hour to build a Base of Concrete
Example of direct man-hour estimation
Labor to be used per the execution of a reinforced concrete base.
In this example, the man-hours required to build a reinforced concrete base are estimated.
Here, we supply the concrete from a semi-automatic concrete plant on the site.
The base to be built has the following dimensions:
-Height 0.50 m.
-Length 3 m.
-Width 2 m.
The foundation has a volume of 3 m3, with a quantity of 100 kg of iron per m3 of concrete.
The following figure shows the filling process of the structure already with formwork and reinforcement in place.
Table with the amount of man-hours to be consumed to build the base.
Note: Excavation, stripping and soil filling times are excluded.

Man-hours according to table to make this base:
30 Mhr + 4.5 Mhr + 14.28 Mhr = 48.78 Mhr
We must correct this value with the variable times specific to each job.
Variable Times
-Labor consumed by moving the equipment and materials to the site of the base.
-Labor for layout and control.
-Times for the depression of the phreatic layer if it applies.
-Labor for excavation and subsequent filling of soil.
-Labor for the execution of the cleaning concrete.
-Labor for curing, demounting and cleaning.
-Labor to be added if we build the base within a operating plant.
-Labor to be added for climatic situations that differ from the standard condition etc.