Per ASTMAmerican Society of Testing and Materials; technical organization formed for the development of standards on characteristics and performance of materials, products, systems and services, and the promotion of related knowledge. D653, a rock fragment, usually rounded by weathering or abrasion, with a dimension of 12 in. (305 mm) or more.
See Female Hex ConnectorA hexagonal shaped socket..
A sewer into which at least two sanitary, combined or stormwater sewers connect.
ControlsPart of the microtunneling system that allows synchronized excavation, removal of spoils, and jacking of pipe to balance forward movement with excavation so that ground settlement and heave are managed. the joint make and/or break mechanism.
A corrugated steel sub-floor on a bridge to support a wearing surface.