What is the recommended building configuration for a cold climate?

In cold climates, building configurations are influenced by the need for energy efficiency, temperature regulation, and snow load management. The recommended choice, which is a six-story building with a 90' x 90' square footprint, is advantageous because it promotes better thermal performance.

A square footprint allows for more efficient heating since it minimizes the surface area relative to the volume of the building. This means there is less exposed surface for heat loss, which is critical in maintaining indoor temperatures during harsh winter weather. Furthermore, a square configuration supports structural stability, reducing risks posed by snow accumulation on the roof.

While a circular footprint or a 'U' shape can provide certain design aesthetics or other advantages, they may not optimize thermal efficiency in the same way as a square footprint does. A rectangular footprint may introduce longer perimeter lengths that can increase heat loss, making it less ideal than the square design. Therefore, the chosen answer aligns with best practices for energy conservation and structural integrity in cold climate building design.