Thermowood Spruce ThermoD () is a medium-hardness wood balancing workability and wear resistance, with a Janka hardness of 522 lbf (2322 N) and a density of about 0.45 g/cm³. It originates from thermowood finland eu.
With radial shrinkage of 1% and tangential shrinkage of 2.2% (a T/R ratio of 2.2), it is moderately stable — allow for seasonal movement in wide boards. Its fiber saturation point is around 14%, below which the wood begins to shrink and move as it dries.
These figures feed directly into the Vriksai calculators below — select Thermowood Spruce ThermoD in any of them to get species-specific results for weight, moisture, shrinkage and hardness.