Required Base Thickness from SN
Mediumstructural numberbase thickness
A pavement requires SN = 3.0. It has 4 in of asphalt (a1 = 0.44) and a granular base (a2 = 0.14, m2 = 1.0), with no subbase. The required base thickness is most nearly:
- A4.4 in
- B6.2 in
- C12.4 in
- D8.9 in
Show solutionHide solution
Answer: D. 8.9 in
The asphalt provides 0.44 × 4 = 1.76. The base must supply 3.0 − 1.76 = 1.24, so D2 = 1.24/0.14 = 8.9 in.
Practice this deckUntimed, one problem at a time, with your progress saved.
Related problems
- Structural Number of a Flexible Pavement · Transportation
- Structural Number of Flexible Pavement · Transportation
- Required Asphalt Thickness from SN · Transportation