Each precast pile is driven in the ground using a drop hammer. Once the first part of the pile has been driven in the ground, it is extended using mechanical interlocking joints means that units can be rapidly coupled to extend the pile to the required founding levels with minimum interruptions in driving. Each precast pile is reinforced throughout its length with high tensile steel and is made in a wide range of standard units to provide flexibility. Video Link Belt driven concrete piles
They are using a diesel fired pile driver and not a drop hammer.
Thanks for your info, i miss my post....
Looks funny... Never seen such short piles here in south Louisiana...
yes you're right, that's the type of short piles. Even the reality on the field there are some short piles cut into 2 parts. Of course.. that piles become very short...:drinkup