All species / Redwood (Old Growth)

Redwood (Old Growth) (Sequoia sempervirens)

Outdoor furniture, decking, paneling and garden structures; light and decay-resistant.

The data

Stiffness (modulus of elasticity)1,340,000 psi

Specific gravity (12% MC)0.4

Janka hardness480 lbf

Average dried weight26.0 lb/ft³

Shrinkage, radial (green → dry)2.6%

Shrinkage, tangential4.4%

Shrinkage, volumetric6.8%

Movement classVery stable

Stiffness & hardness: USDA Wood Handbook (Table 5-3 class data). Shrinkage: USDA Wood Handbook. Full sourcing notes are in our data documentation on the guides page — values print with their source so you can check us.

Shelf span guide — Redwood (Old Growth)

Longest span that stays at or under the 0.02 in/ft long-term standard, floating ends, load spread evenly:

Shelf	15 lb/ft	25 lb/ft	35 lb/ft
3/4 in thick, 11 in deep	32 in	27 in	24 in
1 in thick, 11 in deep	43 in	36 in	33 in

Quick sag check — Redwood (Old Growth)

Span (in)

Depth (in)

Thickness (in)

Total load (lb)

Full options — edging strips, fixed ends, centered loads — in the Shelf Sag Calculator.

Quick movement check — Redwood (Old Growth)

Width across grain (in)

Cut

From MC (%)

To MC (%)

Full options in the Wood Movement Calculator.