What page in AASHTO 1993 contains information about the structural number, SN?

• A. Pages I-3
• B. Pages I-5
• C. Pages I-10
• D. Pages II-2

Answer: (B)

The reference to the structural number (SN) in AASHTO's 1993 publication is indeed located on page I-5. The structural number is crucial in pavement design because it provides a numerical expression of the load-carrying capacity of a pavement structure. Understanding where to find SN and details regarding its calculation, significance, and application in design helps engineers make informed decisions regarding pavement materials and thickness.

Page I-5 specifically contains comprehensive information on how to determine the structural number based on the types of materials used and their corresponding layer coefficients. This information is essential for engineers engaged in the planning and designing of highways and roads, as it directly influences the durability and safety of the pavement structure.

In contrast, the other page numbers mentioned may contain related information but do not specifically address the structural number to the same extent as page I-5 does. The pavement design methodology and its underlying principles are foundational concepts that lay the groundwork for understanding various pavement applications, making this specific reference significant for civil engineering professionals.