Final answer:
The minimum live load for external balconies and decks as specified by the International Building Code (IBC) is 60 pounds per square foot (psf). This requirement is pertinent in the engineering field and ensures that structures can safely support the expected weight from occupation and use.
Step-by-step explanation:
When examining the load requirements for external balconies and decks, we are primarily concerned with structural safety and adherence to building codes. In the United States, the International Building Code (IBC) provides the minimum live load requirements for different building elements, including balconies and decks. These requirements are a part of ensuring that structures can safely support the typical loads they will experience over their lifetime.
The IBC specifies that the minimum live load for balconies, exterior decks, and similar structures is 60 pounds per square foot (psf). This live load is intended to account for the people and objects that may occupy these spaces. The live load ensures the structure is designed to support a certain amount of weight, which is calculated based on the anticipated usage of the space.
It is important to note that local building codes can augment the IBC standards. Therefore, for specific projects, it is essential to consult the local jurisdiction's building code to determine if a higher minimum live load is required. Engineers and architects must design balconies and decks to at least meet the minimum live load requirements, but they often design for higher loads to account for unusual or unforeseen usage.