1. These timbers must be secured to the base course with barn spikes. 2. Below the base course are the binder course, and the cement-treated base. 3. "Base course " refers to the sub-base layer of an asphalt roadway. 4. Typical base course thickness ranges from and is governed by underlying layer properties. 5. The base course serves as a plinth for two-story Tuscan-order pilasters and an entablature. 6. Aggregate material laid on the subgrade, on which the base course layer is located. 7. The AMANET HRE web-based course has been very successfully accessed through the AMANET website. 8. If there is a subbase course, the base course is constructed directly above this layer. 9. The Centre now offers courses in Musical Theatre for students wanting a more performance-based course . 10. Aggregate base course is often referred to as ABC.