Wood Species Comparison Chart: Strength, Workability, and Best Uses
Selecting the correct wood species is a primary material decision in any carpentry or woodworking project, affecting structural performance, machining behavior, finishing compatibility, and long-term durability. This reference covers the principal strength metrics, workability characteristics, and established use cases for the species most commonly specified in US residential and commercial work. Professionals and researchers navigating the broader woodworking materials landscape will find this chart a functional starting point for species-to-application matching.
Definition and scope
A wood species comparison chart is a structured reference tool that maps measurable physical properties — Janka hardness, modulus of rupture (MOR), modulus of elasticity (MOE), density, and grain characteristics — to practical workability and end-use suitability across commercially available timber species.
The primary hardness benchmark used across North American lumber markets is the Janka hardness test, developed by Austrian researcher Gabriel Janka and standardized through ASTM International under test method ASTM D143, which measures the force required to embed a 0.444-inch steel ball to half its diameter into a wood sample. Results are expressed in pounds-force (lbf). The Wood Database, a widely cited open reference maintained by Eric Meier, documents Janka ratings for more than 400 species. The US Forest Products Laboratory (FPL), part of the USDA Forest Service, publishes the reference text Wood Handbook: Wood as an Engineering Material (FPL-GTR-282), which provides MOR, MOE, and density values that form the backbone of any credible species comparison.
The distinction between hardwoods and softwoods is botanical, not strictly a hardness ranking — balsa is classified as a hardwood despite a Janka rating of approximately 100 lbf, softer than most construction softwoods.
How it works
Wood species are evaluated across five primary performance dimensions:
- Janka hardness (lbf) — resistance to surface denting and wear; critical for flooring, workbench tops, and high-traffic furniture
- Modulus of rupture (psi) — maximum load-bearing stress before failure; governs structural span calculations
- Modulus of elasticity (psi × 10⁶) — stiffness under load; determines deflection in beams and shelving
- Density / specific gravity — affects weight, fastener holding, and machining behavior
- Workability rating — a composite assessment of ease of sawing, planing, routing, and sanding, plus glue adhesion and finish absorption
The table below covers 8 species that represent the range from utility softwood to high-end hardwood:
| Species | Janka (lbf) | MOR (psi) | MOE (×10⁶ psi) | Density (lb/ft³) | Primary Use Category |
|---|---|---|---|---|---|
| Eastern white pine | 380 | 8,600 | 1.24 | 25 | Framing, millwork, trim |
| Douglas fir | 660 | 12,400 | 1.95 | 32 | Structural framing, beams |
| Southern yellow pine | 1,225 | 13,000 | 1.98 | 37 | Decking, framing, floors |
| Poplar (yellow poplar) | 540 | 10,100 | 1.58 | 28 | Paint-grade furniture, casework |
| Hard maple | 1,450 | 15,800 | 1.83 | 44 | Flooring, cabinetry, cutting boards |
| Red oak | 1,290 | 14,300 | 1.82 | 44 | Furniture, flooring, millwork |
| Black walnut | 1,010 | 14,600 | 1.68 | 38 | Fine furniture, gunstocks, turning |
| Teak | 2,330 | 14,600 | 1.55 | 41 | Marine, outdoor furniture, decking |
MOR and MOE values drawn from USDA FPL-GTR-282. Janka values from ASTM D143 test data as documented in the Wood Database.
Workability diverges sharply even among species with similar hardness. Red oak and hard maple share nearly identical Janka ratings but behave differently under tools: oak's open grain planes cleanly but absorbs stain unevenly without a grain filler; maple's tight, closed grain produces a smooth machined surface but burns under router bits at low feed rates.
Common scenarios
Structural framing: Douglas fir and Southern yellow pine dominate US residential framing because their MOR values exceed the minimum thresholds set in the International Residential Code (IRC) for #2-grade dimensional lumber at standard spans. Southern yellow pine carries a density advantage that improves fastener holding in deck ledger connections.
Cabinetmaking: Poplar is the default secondary wood in paint-grade cabinet construction — its 540 lbf hardness is adequate for interior cabinet boxes, it machines cleanly, and its cost is 40–60% lower than hard maple in most US markets. Hard maple at 1,450 lbf is specified for drawer boxes and face frames where impact resistance and tight tolerances are required. The cabinetmaking fundamentals discipline draws heavily on this species hierarchy.
Flooring: Janka hardness directly predicts wear resistance. The National Wood Flooring Association (NWFA) references Janka ratings as the primary species selection criterion for residential versus commercial flooring installations. Hard maple (1,450 lbf) is the standard for gymnasium floors; red oak (1,290 lbf) remains the most-installed domestic hardwood floor species in the United States by volume.
Outdoor and marine applications: Teak's natural silica content and high oil concentration give it a Janka rating of 2,330 lbf and exceptional resistance to moisture, rot, and UV degradation without chemical treatment. The Forest Stewardship Council (FSC) certifies sustainably sourced teak, a specification commonly required on commercial marine projects.
Turning and carving: Black walnut at 1,010 lbf is preferred in wood turning and wood carving techniques for its predictable grain, low silica content, and the deep brown figure that requires minimal finishing to achieve market-ready aesthetics.
Decision boundaries
Three decision points determine species selection in professional practice:
Hardness threshold vs. machinability tradeoff: Species above 1,500 lbf Janka — teak, hickory (1,820 lbf), hard maple — blunt cutting edges faster than mid-range hardwoods and require carbide-tipped tooling. Projects that demand high machining volume but moderate wear resistance are better served by red oak or black walnut.
Structural grade vs. appearance grade: Douglas fir graded to American Lumber Standard Committee structural grades carries published allowable stress values recognized by the IRC and IBC. The same species in appearance grade lacks those design values and cannot be substituted in engineered calculations without separate documentation.
Domestic vs. imported species pricing and supply risk: Hard maple and red oak are commercially available from domestic Appalachian and Great Lakes mills at predictable cost. Teak sourcing involves international supply chains, FSC certification verification, and import documentation — a procurement complexity relevant to woodworking pricing and estimating.
A fourth boundary applies to sustainable woodworking practices: CITES Appendix II restrictions affect certain rosewood species (Dalbergia spp.), requiring documentation at point of sale and export, regardless of Janka performance. Substituting black walnut or wenge in fine furniture avoids those compliance obligations entirely.
References
- USDA Forest Products Laboratory — Wood Handbook: Wood as an Engineering Material (FPL-GTR-282)
- ASTM International — ASTM D143: Standard Test Methods for Small Clear Specimens of Timber
- American Lumber Standard Committee (ALSC) — PS 20-20 American Softwood Lumber Standard
- International Code Council — International Residential Code (IRC 2021)
- National Wood Flooring Association (NWFA)
- Forest Stewardship Council (FSC) — Chain of Custody Certification
- U.S. Bureau of Labor Statistics — Carpenters Occupational Outlook Handbook
- Woodworking Authority — Home