"Replacing steel with aluminum in construction: never really happened although unclear why this would be a good idea." My house, built in 1976 in Washington, ac

"Replacing steel with aluminum in construction: never really happened although unclear why this would be a good idea." My house, built in 1976 in Washington, actually has aluminum framing as do the few houses next to it built at the same time. From what I heard there was a short period where aluminum was cheaper than wood for framing and caused the switch over. I'm not sure how localized this was. All the contractors I worked with find both the framing and how the house was framed unique but they are still able to work with it.