Lumber sizes
Nominal vs actual lumber dimensions and trim profiles
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The Lumber Sizes guide helps architects, builders, and designers understand the difference between nominal and actual lumber dimensions - a critical distinction in construction and design.
Learn how a 2x4 is actually 1.5" x 3.5", why nominal dimensions differ from actual dimensions, and access comprehensive reference information for common lumber sizes used in framing, finish work, and construction.
Key features: - Nominal vs actual dimension reference - Common framing lumber sizes - Trim and finish lumber specifications - Board feet calculations - Construction lumber standards - Quick reference guide
This tool eliminates confusion about lumber sizing and helps ensure accurate material takeoffs and construction specifications. Understanding nominal vs actual dimensions is essential for proper framing, finish work, and material ordering.
Features
Everything you need
- Nominal vs actual dimensions
- Common framing lumber sizes
- Trim and finish lumber specs
- Board feet reference
- Construction standards
- Quick reference guide
How it works
Simple workflow
- 1Select the lumber size you need to reference
- 2View nominal and actual dimensions
- 3Check trim profile specifications if applicable
- 4Use dimensions for material takeoffs and ordering
Use cases
Built for real-world scenarios
Framing design
Understand actual lumber dimensions for accurate framing plans and material takeoffs.
Finish work
Reference trim and finish lumber sizes for baseboards, casing, and other finish elements.
Material ordering
Ensure accurate material orders by understanding the difference between nominal and actual dimensions.
FAQ
Frequently asked questions
Nominal dimensions refer to the rough-sawn size before planing and drying. Actual dimensions are the finished size after processing, which is typically 0.5" smaller in each dimension.
Common framing lumber includes 2x4, 2x6, 2x8, 2x10, and 2x12. Common trim sizes include 1x4, 1x6, and various baseboard and casing profiles.
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