The shortest duration of fire-resistance testing for nonsymmetrical walls determines what aspect of the wall?

The shortest duration of fire-resistance testing for nonsymmetrical walls is specifically used to establish the fire-resistance rating of the wall. This rating indicates how long the wall can withstand exposure to fire and maintain its structural integrity and functional capabilities.

In the context of fire safety, the fire-resistance rating is critical as it informs building codes and safety regulations. It helps determine whether the materials and assembly of the wall can adequately protect against the spread of fire and heat transfer for a specified duration. This rating is essential for ensuring that any fire hazards are effectively managed within a commercial building.

While other aspects such as total fire safety rating, average fire-resistance duration, and appropriate construction materials may relate to the broader framework of fire safety and building standards, they do not specifically arise from the testing of nonsymmetrical walls in the same direct manner as the fire-resistance rating does.