ABSTRACT
Conservation and analysis of early modern structure often begins with the main structural material: we have one set of techniques for steel-framed buildings, another for reinforced concrete, and another for those buildings which are architecturally modern but are constructed using traditional wood and masonry. This focus is inevitable but tends to obscure secondary structural materials and systems, which include the framing for facade ornament, structural adaptations for mechanical systems, and floor systems. This paper will address the original design and current-day analysis of floor systems used in the United States between 1890 and 1930 to fill in between iron and steel beams.
