Final answer:
The number of workers that can be on a window jack scaffold at one time depends on the maximum weight capacity of the scaffold and the weight of each worker. It is important to consult the manufacturer's specifications or guidelines for the specific scaffold being used. Safety guidelines and regulations should always be followed when working on scaffolds.
Step-by-step explanation:
In order to determine the number of workers that can be on a window jack scaffold at one time, we need to consider the maximum weight capacity of the scaffold and the weight of each worker. The weight capacity of a scaffold varies depending on its design and construction, so it is important to consult the manufacturer's specifications or guidelines for the specific scaffold being used.
For example, if the scaffold has a weight capacity of 1000 kg, and each worker weighs 75 kg, the maximum number of workers that can be on the scaffold at one time would be 1000 kg / 75 kg = 13.3 workers. Since you cannot have a fraction of a worker, the maximum number of workers would be 13, considering a safety margin.
Keep in mind that ensuring the safety of workers is of utmost importance, so it is always recommended to follow safety guidelines and regulations when working on scaffolds.