Installing a building hoist involves several steps: 1) Site preparation, ensuring the ground is level and strong enough to support the hoist. 2) Assembling the hoist tower, starting from the base and working upwards. 3) Installing the motor and drive system. 4) Attaching the cable and counterweight. 5) Rigging the hoist with safety devices and load limiters. 6) Conducting a thorough inspection and testing the hoist for safety and functionality. 7) Obtaining any necessary permits and approvals. It's crucial to follow the manufacturer's instructions and local regulations, and often requires a professional team for safe and proper installation.