Below are a few slides that my Dad took of the construction of the Astrodome:
http://img292.imageshack.us/img292/5035/6104124jm.th.jpg
http://img83.imageshack.us/img83/3115/6104134zj.th.jpg
http://img331.imageshack.us/img331/1955/6210097mt.th.jpg
http://img209.imageshack.us/img209/1613/6310012ur.th.jpg
http://img283.imageshack.us/img283/2447/6310028wj.th.jpg