What is the most common building material used in North America for structural assemblies?

Wood is the most common building material used in North America for structural assemblies due to several factors. Its availability, cost-effectiveness, and workability make it a preferred choice for residential and some commercial construction. Wood is structurally strong and has excellent insulation properties, which contributes to energy efficiency in buildings. Moreover, traditional building practices and local building codes often emphasize wood for framing, particularly in single-family homes and light-frame construction.

Additionally, the domestic supply of lumber, mainly sourced from North American forests, ensures that it remains a practical and sustainable option. While materials like concrete, steel, and brick are also widely used, especially in larger or more specialized structures, they do not match wood's prevalence in residential buildings where approximately 80% are constructed using wood framing techniques. This widespread use highlights wood's crucial role in both the construction industry and the cultural landscape of North America.