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Specification for granular material

The granular bedding material must comply with the requirements of Table A2.2.
Table A2.2 BS EN 13242 Fine aggregates for micro trenching
Category for general grading requirements Category GF80
Category for tolerances on manufacturer’s declared typical grading GTFNR (no requirement)
Category for maximum values of fines content

Gravel – f3

Crushed rock recycled aggregate – f11
Aggregate size, mm 0/4 or 0/6
The size fraction of the aggregate passing the 0.425 mm size test sieve must be non-plastic as defined by and tested in accordance with BS EN 17892-12.