Which division includes drawings related to the external environment of a building?

The division that includes drawings specifically related to the external environment of a building is the one that focuses on the landscape and site layout. This encompasses various elements such as topography, vegetation, pathways, and outdoor structures that are integral to the overall design and functionality of the surrounding area.

Landscape/site drawings provide crucial information on how the building interacts with its environment, ensuring that factors like drainage, accessibility, and aesthetic integration are considered. This section is vital for understanding how the building fits within its context and how it will affect and be affected by the external conditions.

In contrast, architectural drawings typically focus on the layout and design of the building itself, including its floor plans and elevations, while electrical drawings depict the wiring and electrical layout within the building. Structural drawings concentrate on the framework and materials supporting the building. Therefore, while all these areas are important in construction and design, only the landscape/site drawings explicitly address the external environment.