S4s Wood
Reference data and engineering information about s4s wood for material properties applications.
s4swood
Overview
Engineering reference data for S4s Wood in material science and properties.
Key Formulas
Stress
Force per unit area.
Strain
Change in length per original length.
Hooke's Law
Stress proportional to strain in elastic region.
Thermal Expansion
Length change due to temperature.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Stress | Pa | |
| Strain | — | |
| Young's modulus | Pa | |
| Thermal expansion coefficient | 1/°C | |
| Temperature change | °C |
Lumber Types
S4S lumber refers to wood that has been planed and surfaced on all four sides. This processing results in finished dimensions that are noticeably smaller than the nominal dimensions.
Surfacing Designations
| Code | Description |
|---|---|
| S1S | Surfaced on 1 Side |
| S2S | Surfaced on 2 Sides |
| S3S | Surfaced on 3 Sides |
| S4S | Surfaced on 4 Sides |
| S1E | Surfaced on 1 Edge |
| S2E | Surfaced on 2 Edges |
| S1S1E | Surfaced 1 Side and 1 Edge |
| S1S2E | Surfaced 1 Side and 2 Edges |
Structural Lumber Classification
Yard lumber (structural softwood lumber) is classified by dimensions: