Bridge construction - Incremental Launching - 3D Animation

Bridge construction, Overall, this is one of the coolest animation jobs. However, I have the following concerns. Base cast expected at 2:12, b4 wall shutters come on, having the base to rest on. This is in addition 2 the bracing needed by the same wall shutters, which only came probably too late at 2:20. This design could be adopted to have a monolithic wall-base job, but the difficulty may come in at maintaining d desired base thickness, as d pressure exerted by d higher wall casts tends to raise the base level.