Which method is NOT used to identify load-bearing structures?

Estimating based on visual appearance is not a reliable method for identifying load-bearing structures. While it might seem straightforward to gauge a structure's strength by merely looking at it, this approach lacks the precision and accuracy required in construction.

Load-bearing elements are often not visibly distinguishable; for example, walls may appear solid but could be non-load bearing, and materials may look robust but serve other purposes. Understanding the specific function and design of each element requires detailed analysis, typically grounded in engineering principles, building codes, and architectural plans.

In contrast, understanding building codes provides essential guidelines that prioritize safety and structural integrity, while blueprints offer a detailed visual representation of the building's layout, showing which walls and supports are critical. Engaging a structural engineer ensures expert analysis and consideration of factors such as force distribution, materials, and load capacity, which cannot be effectively assessed through mere visual inspection.