G2, G5, G6, G7 Layer Works Material
Fines from a parent rock are included in a compactable crushed gravel.
 	- G2 - Crushed granite rock and fines from the parent rock with a maximum size of 37.5mm.
- G5 - Gravel and boulders crushed to a maximum nominal size of 53mm. Sub-base material for paving, driveways, concrete slabs, sidewalks, roads, etc.
- G6 - Natural material (soil, sand, gravel). Under roads and paving, it is used as a filling and a base coarse. There is a possibility that this material may contain approved natural fines that were not obtained from the parent rock.
- G7 - Natural materials (soil, sand, gravel). For building foundations and roads, it is used as a sub-base.