As mentioned, we start with investigating the buildings drawings and calculate the number of square meters (or square feet) of glass panels that need to be cleaned. For this particular project we calculated approximately 40 500 m2 (435 938 ft2) of glass panels on a 350+ meter (1150+ feet) high skyscraper.
Now that we know the amount of glass we need to calculate for cleaning, it is time to take a look at the technical capacity of the BMU; what is the hoisting speed* of the unit and how long does it take to make a single drop? And more important, how does this time influence the time of work that window washers need to take into mind.
* Maximum speed of vertical movement of the platform or cradle.