Скачать или смотреть Lumber Sizing Explained: Nominal vs Actual, 1x, 2x, and Posts

Lumber sizing is one of the most misunderstood fundamentals in construction, and the mistakes rarely show up right away.

In this video, we break down how lumber sizing actually works, starting with why a two-by-four is not a measurement, but a historical label. You’ll learn the difference between nominal and actual sizes, why professionals think in real dimensions, and how small sizing assumptions turn into alignment problems, insulation issues, and finish conflicts later on.

We walk through the proper role of one-by lumber, why it should never be load-bearing, and how two-by lumber really functions as the structural backbone of light-frame construction. You’ll also learn why depth matters more than width, why engineers increase member depth before anything else, and how deflection and vibration are controlled long after a building passes inspection.

This video also explains how lumber length availability influences real design decisions, why excessive splicing creates long-term problems, and why professionals avoid four-by-four posts in favor of six-by-six members for structural stability.

This is not theory. It’s how experienced builders choose lumber sizes that behave well for decades, not just on inspection day.

If you work in construction, carpentry, framing, project engineering, or inspection, this video will change how you look at lumber sizes permanently.

Timestamps:

00:00 Nominal Size vs Actual Size (Why a 2×4 Isn’t a Measurement)
00:40 1x Lumber – What It’s For and What It Should Never Do
02:25 2x Lumber – The Structural Backbone of Framing
04:06 Depth vs Width – How Professionals Control Deflection
06:33 Lumber Lengths and Real-World Design Limits
08:19 4×4 vs 6×6 Posts – Why Pros Avoid the Smaller Size

This video is part of a professional construction education series focused on real-world performance, not shortcuts.

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