Natural, construction & bio-based materials · Wood & timber
Spruce–pine–fir structural lumber
Spruce–pine–fir structural lumber is a representative construction or bio-based material record. Moisture, orientation, mixture design, grade and test method must accompany engineering values.
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01
Overview
- Material class
- Natural, construction & bio-based materials
- Category
- Wood & timber
- Family
- Structural softwood
- Product forms
- Standard construction product, Panel/member or mixture
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Identity / formulation | Kiln-dried graded SPF lumber | Natural variability or mixture design applies |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 350–550 | kg/m³ | Representative generic grade; verify supplier, condition and test method |
| Representative strength | 20–50 | MPa | Representative generic grade; verify supplier, condition and test method |
| Representative elastic modulus | 7–13 | GPa | Representative generic grade; verify supplier, condition and test method |
| Moisture sensitivity | Material dependent | — | Representative generic grade; verify supplier, condition and test method |
| Thermal conductivity | Material dependent | W/m·K | Representative generic grade; verify supplier, condition and test method |
| Durability | Exposure and detailing dependent | — | Representative generic grade; verify supplier, condition and test method |
Conditions
Representative engineering condition
Condition carried forward from the Phase 1 record.
03
Processing and use
Processing
- Record moisture, orientation, grade, mixture proportions, cure and test direction before comparing data.
Applications
- Buildings and infrastructure
- Panels and structural members
- Durable low-carbon products
Selection considerations
- Natural and construction materials require condition- and standard-specific design values.
04
Standards and related materials
Standards and designations
No standard designation is listed.
Other names
- SPF lumber
05
Sources and context
Sources
- USDA Forest Products Laboratory — Wood HandbookGovernment reference
- USDA Forest Products Laboratory — Mechanical properties of woodGovernment reference
- Federal Highway Administration materials resourcesApplication reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Region, grading system, feedstock and local production practices strongly affect availability.
Renewable content, durability, repairability, embodied carbon and end-of-life route should be assessed together.
Strategic context
Important for infrastructure, embodied-carbon reduction and resilient construction.