The relationship between structural works and special foundations relies largely on the Load Transfer Document (LTD), which, beyond a simple listing, can play a truly structuring role in the project design and in defining the interface between trades.

When advantageously supplemented with information such as execution tolerance management and the stiffness to consider at the top of each pile, the LTD becomes a key element — relayed by the technical specifications (STS) — to clarify the boundary between trades and secure the design.

This article provides specific insight into these sometimes‑confusing geometric, mechanical, and contractual aspects, and shows the value of documenting them early on.