Lumber sizes began changing significantly with the implementation of the first national standard in 1924.
Evolution of Lumber Size Standards
Historically, the concept for rough lumber was to be the full nominal size, often used in a dry condition. However, following World War I, the construction industry saw increasing demand for lumber. This growth necessitated more standardized practices across the nation to ensure consistency and predictability in building materials.
Key Dates for Lumber Size Standard Revisions
The introduction of the national size standard in 1924 marked a pivotal point in lumber manufacturing and usage. This initial standard provided a baseline, but the industry continued to evolve, leading to several subsequent revisions to the national size standards.
According to the provided reference, the key dates for these revisions included:
- 1924: First national size standard established.
- 1926: First revision to the standard.
- 1928: Second revision.
- 1939: Third revision.
- 1953: Fourth revision.
- 1964: Another revision was proposed for adoption.
These dates highlight a period where the industry continually refined its standards for lumber sizing, moving away from older, less uniform practices towards more consistent national specifications. Each revision likely reflected changes in manufacturing technology, drying practices, industry needs, and potentially even the measurement basis (e.g., green vs. dry size).
