What is the maximum wall length perpendicular to the floor joists allowed for a single-family dwelling using cold-formed steel wall framing?

The correct choice reflects the maximum wall length that can be built perpendicular to the floor joists when using cold-formed steel wall framing in a single-family dwelling. In construction, specific rules and guidelines are established to ensure structural integrity and stability. For structures utilizing cold-formed steel, the design relies on known limitations for effective load distribution and resistance against lateral forces.

When wall lengths exceed the maximum permitted, issues arise concerning the ability of the wall to properly carry loads and resist deflections or buckling. The specified limit of 6 inches is grounded in industry standards that dictate the strength and performance characteristics of cold-formed steel. Walls constructed beyond this length may lead to complications during construction and in the long-term performance of the building, potentially resulting in safety concerns or structural failures.

In the context of the other choices, they do not adhere to the established guidelines for cold-formed steel framing and would similarly face issues of structural inadequacy if implemented. Thus, the maximum wall length of 6 inches serves to ensure compliance with regulatory requirements and best practices in construction.