Description
A selected granular fill classification defined within the Specification for Highway Works earthworks series. Class 1 materials are granular fills whose permitted properties and grading are set by Table 6/1.
Sub-base & Fill Materials
Class 1A Fill
Typical Uses
Structural fill, embankments, general earthworks and backfill where Class 1A is specified.
Specification & Important Note
Class 1A is a specification classification, not a single fixed stone size. Test results and project-specific requirements must be checked.