IS EN 14199:2015 define micropiles as ‘drilled piles constructed using a drilling tool with a diameter less than 300 mm’, the majority of the load being resisted structurally by the reinforcement and geotechnically by the bond at the grout/soil interface.

Capacity is determined by the diameter of the drilling tool and bar, length of micropile and the soil conditions. Testing is normally completed by integrity testing, dynamic load testing or tension testing, or a combination of all three, depending on the design requirements. Substruck Ltd. offers two types of micropiles.