- S6.6.13
- Once the duct/cable and locating strips have been installed, the trench must be reinstated in two or three courses, as follows.
- Course 1 (conditional only – see below) – granular bedding material
- Course 2 – indicator infill material
- Course 3 – surface infill material
- S6.6.14
- Where the depth of the micro trench after installation of the duct/cable is greater than the adjacent depth of bound materials, granular bedding material or indicator infill material must be used up to the base of the adjacent bound layers.
- S6.6.15
- The indicator and surface infill material must be used within the bound materials.
- S6.6.16
- The minimum combined thickness of courses 1, 2 and 3 above the apparatus is 175 mm for roads and 100 mm for footways, footpaths and cycle tracks.
- S6.6.17
- If the depth of the micro trench is fully within the bound layers after installation of the duct/cable, only indicator and surface infill material need to be used.
- S6.6.18
- Granular bedding is not permitted within the bound layers of the adjacent structure.
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