Prior to what year were most single and multifamily dwellings typically built with conventionally constructed roof and floor assemblies?

Most single and multifamily dwellings were typically built with conventionally constructed roof and floor assemblies prior to the year 1960. This practice reflects the building trends of the time, which focused on traditional methods and materials that have been used for many years. During this period, construction was generally characterized by the use of heavy timber framing, and roofing and flooring systems were designed with the principles of durability and strength in mind.

In the 1960s, changes in building codes, materials, and architectural design began to shift toward more innovative and often prefabricated methods, which would eventually lead to the use of engineered wood products and lighter framing techniques. Thus, understanding this timeline provides insight into construction practices and safety considerations that have evolved over the decades.