Jun 12, 2018· (1000 project hours / 20 work days in the month = 50 hours per day; 50 hours per day / 8 hours per worker = laborers needed.) Round the number of laborers up or down to a whole number, and adjust accordingly the number of workdays required. Be realistic about the number of workers you can hire in a given time period.
Because of concrete color, concrete reflects 3050% more light than asphalt. This reduces the temperature in major cities by up to 7%. Heavy trucks get up to 20% better mileage on concrete rather than asphalt.