Resistance piling was a huge lesson: each tiny discrepancy compounds across assemblies, so shop drawings define spaces

https://www.scribd.com/document/1039664098/Copper-Doesn-t-Lie-The-Case-for-Customized-Smokeshaft-Shrouds-and-a-100-Year-Roof-Strategy-208840

Resistance stacking was a big lesson: each little discrepancy compounds across assemblies, so store illustrations specify gaps, shims, and slot lengths to make sure a best site fit.