The large number embedded parts involved (a nuclear power plant block may have more than 100,000 anchor plates) calls for a particular feature of planning, such as recognising collisions in good time and avoiding them, and particular preparations on site to ensure that they can be finished on time in parallel with the formwork and reinforcement work. As well as the anchor plates just mentioned, fitted components include such items as pipes, foundation frames and the frames for Omega water stops, known as Omega frames. These are attached to the formwork or to special support structures, and this must be carried out in such a way as to maintain the tight tolerances in terms of precision location once concreting is complete.

With the OL3 construction project, the anchor plates used to fix components later on are made largely of ferritic steel anchored by headed studs (Figure 4.23).

These anchor plates arrive on site coated with rust-protection base coat, and are painted in the finishing phase. The plates are painted once again once the load-bearing structure is in place.

Pipe lead-throughs of ferritic or austenitic steel are installed in the first — or second-cast concrete. Fitting them at the second-cast concrete stage means an extra work process before handing over to the mechanical trades, which could delay the latter starting; but the installation quality is generally higher in terms of precision.