Which hole liners do I need to perform ASTM F2170?

When drying is from the top only, it is recommended that the hole should be drilled to approx 40% of the slab thickness. For ASTM 2170 use a 3/4" drill bit.

When drying is from both sides, it is recommended that the slab should be drilled to approx 20% of slab thickness. For ASTM 2170 use a 3/4" drill bit.

Hole liners for performing ASTM F2170 are 19mm wide and 76mm long. Longer hole liners are available for extra thick slabs.