How to calculate per hour labor costs for plastering & painting of a building
This construction video tutorial is very useful for civil engineering students who will appear for Civil Engineering PE Exam.
In this video, a solution is given to the following construction problem :-
Suppose, there is a room with dimension 40 feet x 30 feet according to plan. The height of the ceiling is 12 feet. The openings for doors and windows are 85 square feet.
The rates of the crews are given below :-
Plaster and paint crew
- 1 supervisor $25 per hour
- 1 laborer $14 per hour
- 2 painters $20 per hour
Plastering production = 60 ft2 per labor hour
Painting production = 160 ft2 per labor hour
The anticipated labor cost for plastering & painting the room (walls and ceiling) is given as follow :-
The total area required for plastering and painting of the room is calculated as follow :-
Height x (area of both walls on both sides) + (area of ceiling) - openings for doors and windows :-
12 feet x [(30 feet + 30 feet) + (40 x 30) - 85 = 2795 square feet
Now, it is required to find out total hours required per labor as follow :-
25 + 14 + 40 (for 2 painters) = 79/4 = 19.75 per labor hour
To find out labor cost per hour for plastering, the calculation is done as follow :-
2795 / 60 = 46.58 x 19.75 = $920.02
To find out labor cost per hour for painting, the calculation is done as follow :-
2795 / 160 = 17.47 x 19.75 = $345.03
By summing up the above, we get 920.02 + 345.03 = 1265.05
So, total labor hour for plastering and painting = $1265.05
To get more clear ideas, go through the following video tutorial.