Panars, thank you very much for your response.
The Splices are full penetration butt weld. And yes you are correct about no slack. However, in some cases I have noticed that the efficiency of the splice deteriorates as pile is driven into the ground and possibly the splice fails. In this case...
Anyone familiar with pda please help me.
I am working on a project where HP 14 x 117 piles are driven vertically as well as battred (4:1 y/x slope). The piles normally penetrate and reach driving criteria at 100' to 105' reaching final blow count of 18-19 bpi. Bottom of piles are usually 50'...