Okay, yes firstly I do agree that section depth does influence product strength, but that purchaser do need to appreciate that there are limits to this, which will affect the long term stability of the product.
In the analysis of sheet pile wall design, a profile's resistance to failing in crippling or buckling is frequently neglected. The web section of a sheet piling profile essentially acts as a column when displacing the load from water and backfill materials. Because columns are compression elements, columns will fail by crushing or buckling or a combination of these two effects when overloaded. Very short stout columns will fail by crushing, and long slender columns will fail by buckling.
At APE we believe it is important that designs maximize strength by optimizing the web thickness in proportion to the depth of cross section.
Okay, to exempilfy this compare the EcoZ vs the Europile, one is 5mm thick and 155 deep, the other is 5.5mm thick but only 115mm deep.
They both of the same sort of bending moment around 4kNm/m but which is the more stable? Which one installs better .... the Europile. The EcoZ relies more of an extreme of geometry to achieve this strength rating, but will clearly be more prone to buckling.
Why do we sell the EcoZ, well some people like Z piles, and this design in fairness has been around for a long time..... time for a change well take a step further and look at the advanced range of plastic sheet piling!