The imagery of steel cages which was mentioned earlier was explained by Raimondi:

As I evolved, my works evolved. I eventually brought myself out of cages, I got my act together, and I was in a castle. "Erma's Desire" has very obvious cages in its construction. One of them is boxed into a three-sided shape, one of them is relatively open. I equate the cages with restrictions people put on themselves, while castles signify forces that allow people to go beyond any limitations and realize their full potential . . . I'm doing environmental sculpture. Steel is a critical material to this nation, and I think the medium I am using as a contemporary artist reflects my society. Everything is made of steel--that's what our industry is like.1

References:

1. Allen, Tom, "'Erma' Sculptor Winning Over Critics," Omaha World Herald, n.d.