Timber - Mechanical Properties

Density, fibre stress, modulus of elasticity ...

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Wood Density
- ρ -
(kg/m3)		 Fibre Stress at Elastic Limit
(N/mm2)		 Modulus of Elasticity
- E -
(N/mm2)		 Compressive Strength parallel to Grain
(N/mm2)		 Shear Strength
(N/mm2)
Ash 657 60 10070 48 10
Beech 740 60 - 110 10350 27 - 54 8.3 - 14
Birch 710 85 - 90 15170 67 - 74 13 - 18.5
Elm, English 560 40 - 54 11790 17 - 32 8 - 11.3
Elm, Dutch 560 42 - 60 7720 18 - 32 7.2 - 10
Fir, Douglas 530 45 - 73 10340 - 15170 49 - 74 7.4 - 8.8
Mahogany 545 60 8690 45 6.0
Oak 740 56 - 87 14550 27 - 50 8 - 12
Pine 530 41 - 83 8550 - 10340 21 - 42 5.2 - 9.7
Poplar 450 40 - 43 7240 20 4.8
Spruce, Norway 430 36  - 62 7380 - 8620 18 - 39 4.3 - 8
Sycamore 625 62 - 106 8970 - 13450 26 - 46 8.8 - 15

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