Is the manager legally responsible for the glass panel falling on one of the workers and injuring him, after he insisted on moving the glass with the help of cleaning workers despite the transport workers' warning?

The damage inflicted upon the transportation workers' supervisor as a result of the glass pane falling on him is guaranteed by the workers who undertook the transport, because they are the direct perpetrators. The manager's request does not absolve them of responsibility, as they could have refused.