Chatoyance was measured by the chatometry.com team using the PZC method. The statistics for this specific timber are hereby summarized to provide an evaluation of data robustness:
Number of sources for samples: 10
Number of individual trees analyzed: 10
Number of specimens: 26
Number of measurements: 78
Max PZC read (of all measurements): 15.4
Min PZC read (of all measurements): 8.0
Max PZC average on one log: 13.7
Min PZC average on one log: 9.0
PZC Average of all logs: 11.1

Species: pseudotsuga mendziesii
Family: Pinaceae
Clade: Gymnospermae
Description: A large evergreen conifer with flat, spirally arranged needles, cones featuring distinctive three-pronged bracts, and thick, furrowed bark on mature trees.
Other Local Names: Douglasie, Douglas, Pin d’Oregon, Sapin de Douglas

Reference Colour: Pinkish brown
Texture: Medium
Grain: Straight
Interlocked Grain: Absent
Notes: Heartwood is pinkish brown with veins. Sapwood has a wide span and is yellowish in colour. Wood may show resin pockets, sometimes quite large.

Diameter: 50÷80cm
Density @12% MC: 540kg/m³
Janka Hardness: 960lbf
Crushing Strength @12%MC: 50MPa
Static Bending Strength @12%MC: 91MPa
Longitudinal Modulus of Elasticity E: 16.8GPa
Volumetric Shrinkage Coefficient: 0.46% per %
Total Tangential Shrinkage TS: 6.9%
Total Radial Shrinkage TS: 4.7%
T/R Anisotropy Ratio: 1.5-
Fibre Saturation Point: 27%
Thermal Conductivity: 0.19W/mk
Lower Heating Value: 18720KJ/Kg
Sapwood Thickness: 5÷10cm
Sapwood Demarcation: Clearly demarcated

Resistance to Decay: Class 3-5 – moderately durable to not durable Atlas of Tropical Timber Species DOUGLAS FIR Cross sections of Pseudotsuga menziesii
Resistance to Dry Wood Borers: Class D – durable (sapwood demarcated, risk limited to sapwood)
Resistance to Termites: Class S – susceptible
Treatability: Class 4 – non-treatable
Use Class Covered by Natural Durability: Class 3 – not in ground contact, outside
Durability Notes: This species is listed in the NF EN 350 standard. Use class 3 only covers wood components without sapwood. According to the European standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used. Heartwood is not permeable to preservative products. Wood is used most of the time with sapwood which is moderately permeable to preservative products.

Log Buoyancy: Not applicable
Log Conservation: Low (treatment necessary)
Drying Rate: Rapid to normal
Drying Risk of Distortion: Slight risk
Drying Risk of Case Hardening: No known specific risk
Drying Risk of Checking: Slight risk

Blunting Effect: Normal
Sawing Tooth: Ordinary or alloy steel
Machining Tool: Ordinary
Suitability for Peeling: Good
Suitability for Slicing: Good
Sawing Machining Notes: Risks of clogging of saw blades and tools due to resin pockets.
Assembly Nailing Screwing: Good
Assembly Notes: Wood slightly acidic: nail or screw corrosion if in contact with moisture. Risk of stains.
End Uses: Heavy carpentry, Exterior joinery, Shipbuilding, Interior joinery, Veneer for back or face of plywood, House framing, Panelling, Poles, Glued Laminated, Exterior panelling

Source 1: Tropical Timber Atlas, Editions Quae, e-ISBN 978-2-7592-2770-9