The technical limits of weight-bearing masonry had imposed formal as well as structural constraints; suddenly, those constraints were gone. None of the historical precedents needed to be applied and this new freedom resulted in a technical and stylistic crisis of sorts. Sullivan addressed it by embracing the changes that came with the steel frame, creating a grammar of form for the high rise (base, shaft, and cornice), simplifying the appearance of the building by breaking away from historical styles, using his own intricate floral designs, in vertical bands, to draw the eye upward and to emphasize the vertical form of the building, and relating the shape of the building to its specific purpose. All this was revolutionary, appealingly honest, and commercially successful.