ICE - From components to structures: managing global tolerances in structural steel construction

Current steel construction codes and designers focus primarily on individual component tolerances (e.g., beams, columns), ignoring how small deviations compound across large, complex structures. Accumulated deviations can severely misalign façades, lift shafts, MEP systems, and finishes, leading to costly delays, disputes, and rework. Estimates of upto 25% impact on project Cost and Schedule are encountered in real projects caused by Tolerance and Constructability issues.

Constructability is also another related subject which is not typically fully researched and mitigated at early stages of projects. Design Engineers tend to under-represent tolerances at the Design Phase of projects, which leads to lost mitigation opportunities. A discussion on a new hierarchy of tolerances for future standards that integrates components, assemblies, overall global structure, and functional interfaces is proposed in this lecture.