Resistance stacking was a huge lesson: each small variance compounds across assemblies, so shop drawings define gaps

https://www.scribd.com/document/1058364989/Why-the-Most-Requiring-Designers-Specify-Custom-made-Copper-Finials-And-What-They-Become-in-100-Years-150365

Resistance piling was a huge lesson: each little inconsistency substances throughout settings up, so shop drawings specify spaces, shims, and slot sizes to make sure an ideal site fit.