Is interpolation allowed in determining load capacities?

In load capacity determinations, interpolation is generally not allowed unless specific guidelines state otherwise. This is because load capacities must adhere to strict safety standards and regulations, which require using tested values under defined conditions. Relying on interpolation can lead to inaccurate assessments, as the exact behavior of materials and structures often cannot be accurately predicted between known data points. Therefore, it's essential to use actual test data and established guidelines rather than estimations to ensure safety and structural integrity. This strict approach helps prevent potential failures that could result from incorrect load calculations.