To prevent accidents caused by improper use of a building hoist, it's crucial to follow safety protocols strictly. Ensure all hoist operators are trained and certified. Regularly inspect and maintain the hoist equipment to check for any defects or wear. Never overload the hoist, and always secure the load properly. Implement clear communication procedures among workers, especially when the hoist is in operation. Set up barriers or warning signs to keep unauthorized personnel away from the hoist area. Finally, conduct regular safety drills to prepare for emergencies and reinforce safety practices among the workforce.