The Walter Steilberg Collection spans the years 1910-1973 and documents Steilberg’s engineering and architectural careers, as well as his own research into building materials and the structural effects of earthquakes. The collection is organized into five series: Personal Papers, Professional Papers, Office Records, Project Records, and University of California.

Steilberg’s personal papers are minimal, consisting of his student drawings. His professional papers, which contain correspondence, collected articles, writings and photographs, are more thorough. These records are primarily related to earthquakes throughout California and in other states. The Berkeley fire of 1923, the structural characteristics of concrete and the effects of termites are also documented. Office records include correspondence to various trade publications and product literature.

Steilberg’s project records include correspondence, notes, reports, photographs and drawings documenting both his consulting and design work. Projects for the University of California, including the Sather Tower renovation, are well-represented. The project records also contain correspondence between Steilberg and architect Gardner Dailey, and biographical information on Julia Morgan.