Coastal Products - Product Directory

Table1. Comparative Physical Properties of Coast Species

    High Range
Low Range
Hem-Fir Douglas Fir Pseudotsuga menziseii Sitka Spruce Picea sitshensis Western Red Cender Thuja plicata Yellow Ceder Chamaecyparis nootkatensis
Ambilis Fir Abies Amabilis Pacific Coast Hemlock Tsuga Heterophylla
Physical Propeties Density(12%-k/m2)     445 480 545 430 385 480
Specific Gravity(12% m.c.)     0.39 0.43 0.49 0.39 0.34 0.43
Bending Strength(MOR)(MPa)     68.9 81.1 88.6 69.5 53.8 79.7
Stiffiness(MOE)(x103 MPa)     11.4 12.3 13.5 11.2 8.3 11.0
Compression parallel to grain(MPa)     40.8 49.7 50.1 37.8 33.9 45.9
Compression perpendicular to grain(MPa)     3.6 4.5 6.0 4.1 3.4 4.7
Shear(MPa)     7.5 6.5 9.5 9.2 5.6 9.2
Cleavage(N/mn)     36.8 37.5 38.9 38.0 25.4 45.4
Dimensional stability (Shrinkage% green to O.D.) Tangential     9.2 7.8 7.4 7.8 4.5 6.0
Radial     4.4 4.2 4.8 4.6 2.1 3.7
Hardness(N)     1820 2740 2990 2200 1470 2510
Durability Natural Durability(approx. life in contact with ground) >10yrs <10yrs
Natural insect resistance                
Trearability(preservatives or fire) permeable-moderately resistant resistant-extremely resistant
Drying Drying rate rapid-moderate fairly slow-very slow
Tendency to check during drying absent or weasily controllable controllable with some care
Tendency to distortion during dying absent-slight moderate
Workability Machining(planing/turning/moulding/mortising/boring, etc.) good-excellent fair
Blunting very little/slight-little/slight moderate
Nailing/resistance to spliting well-excellent poor-satisfactory
Screw/nail holding good-excellent satisfactory
Gluing w/out difficulty exceptional difficult satisfactory
Finishing Natural colour-whitsh1, creamy wht2,lt.buff, pale/It.yellw4. yellwsh5, yellwsh-brn6,pnksh7, redsh wht8,salmon9, pnkshyellw10, red11,cherry rd12, do rd13, mahogany14, pnk-brn15, orng16, dk chocolate brn17, It brn18, pale rdsh brn19, orng-wht20 1,3,6 1,6 4,8,11,13 2,4,7,10,16 9,17,15 1,5
Paint finishing good- excelent poor-satisfactory
Stain finishing good- excelent poor-satisfactory
Tendency to resin exudation Absent or infrequent after drying Acceptability depends on finish to be used and visual standards required
Miscellaneous properties Tendency to corrode ferrous metals Likely Unlikely
Becomes stained in contact with ferrous metals Likely Unlikely

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