31 Base course

31 Base course:

The part of the construction resting upon the sub-grade and through which the load is transmitted to the sub-grade or the supporting soil. A base course is the layer immediately under the wearing surface. The part of the construction resting upon the sub-grade and through which the load is transmitted to the sub-grade or the supporting soil. A base course is the layer immediately under the wearing surface. The part of the construction resting upon the sub-grade and through which the load is transmitted to the sub-grade or the supporting soil. A base course is the layer immediately under the wearing surface.