In construction, why is it important not to include eaves or overhangs when measuring the span of a truss?

Eaves or overhangs are not considered structural components of a truss, which is why they should not be included when measuring the span of a truss. The primary function of a truss is to support and distribute loads, and its span is defined as the distance between the outermost supports of the truss itself.

Including eaves or overhangs could inaccurately increase the measured span, leading to potential miscalculations in load distribution, material requirements, and overall structural integrity. Knowing that eaves and overhangs primarily serve as architectural features for design or weather protection, rather than bearing loads like trusses, underscores their irrelevance in measuring the true functional span of the truss.

Understanding this distinction is crucial for accurate construction planning and ensures that structural elements are evaluated correctly according to their intended function. This approach helps maintain the integrity and safety of the construction project.