The metal hollow door installation at Google Headquarters in Manhattan involves fitting durable and secure metal doors throughout the facility. These doors are typically used for their strength, fire resistance, and soundproofing qualities. The installation process includes precise measurements, secure mounting of door frames, and the addition of hardware such as locks, hinges, and handles. The metal hollow doors are chosen to meet safety and security standards while maintaining the modern design aesthetic of the building. This installation is an integral part of the construction, ensuring both functionality and compliance with building codes in the headquarters