The use of drones in the construction industry has been dramatically growing in different areas such as building inspection, site mapping, and safety monitoring. The increasing deployment of drones in construction leads to more collaboration and interaction between human workers and drones. This raises novel occupational safety issues, especially for those workers who already work in a hazardous environment. While there is significant research about the benefits of drones for specific construction applications, there is a knowledge gap about the safety risks of integrating such technology into construction sites. This study uses 4D simulation to mimic and visualize virtual construction sites populated with drones to detect safety risks of their presence under different working conditions. The validated 4D simulation can provide a valuable source for safety risk identification and assessment of drone integration on construction sites.