Description
4x4 Douglas Fir Timber – Surfaced Four Sides (S4S) – #1 Structural, Kiln-Dried
Our S4S Douglas Fir timbers are graded #1 Structural and kiln-dried for improved strength, stability, and performance. The S4S (Surfaced Four Sides) finish provides a clean, planed surface on all four faces of the timber, resulting in a straight, uniform profile with square edges.
This finish is ideal for structural framing, load-bearing applications, and general construction where strength and consistency are essential. It’s also suitable for installations where the timber will be concealed, painted, or further modified on-site.
Size Note: The actual finished size of a 4x4 S4S Douglas Fir timber is 3 1/2" x 3 1/2", with a manufacturing tolerance of ±1/16". This finish does not include sanding or edge easing—corners remain sharp and square, with visible milling marks possible.
Appearance Note: No wood filler or putty is applied, and no surface sanding is performed. Natural grain variation, knots, and minor imperfections consistent with #1 Structural grading may be present.
