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Western Red Cedar
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Western Red Cedar
Botanical Name: Thuja plicata
Common Name(s): Cedar, Giant Arbor Vitae, Red Cedar
Origin: North America
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| General: |
A light timber with a distinctive odour it is non-resinous and straight-grained, with obvious growth rings. Assumes a uniform reddish-brown colour once dried, after long exposure wood becomes silver grey, this weathered look is often sought after. |
| Seasoning: |
Smaller sizes dry easily, larger boards need extra care to prevent internal checking and collapse. Almost no tendencies to warp and check once dry with little swelling or shrinking movement. |
| Working: |
The timber is easily worked, but its brittle nature can cause splintering also its soft character can lead to chip-bruising. Care should be taken when planning and moulding, sharp cutters will also help create a nice finish. Stains and paints well. |
| Uses: |
Interior panelling, fine furniture, interior and exterior joinery, weatherboards and cladding. |
| Availability |
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Photos of Western Red Cedar |
http://www.timspec.co.nz/News--Info/Image-Gallery-s155205-1110.htm
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| Stocked: |
Yes |
| Price: |
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| Supply - Resource Certification |
| Primary Supplier(s): |
Western Forest Products |
| Resource Certification: |
CSA (which is PEFC) |
| Durability - Durability |
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Durability (In Ground)
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| Durability (Above Ground): |
Durable |
| Density |
| Density Air Dried | 385 kg/m² |
| Shrinkage |
| Shrinkage Radial | 2.1 % (Green to 12% MC) |
| Shrinkage Tangental: |
4.5 % (Green to 12% MC) |
| Stability |
| Stability Kiln Dried | Very stable |
| Stability Green: |
Stable |
| Mechanical Properties |
| Mechanical Links |
Janka Hardness:
(Average) |
1.6 kN |
| Modulus of Rupture / Bending Strength: |
53 MPa (N/mm² or MN/m²) |
| Modulus of Elasticity / Stiffness: |
7.7 GPa (GN/m²) |
| Maximum Crushing Strength: |
35 MPa (N/mm² or MN/m²) |
| Strength Group Unseasoned: |
S7 |
| Strength Group Seasoned: |
SD7 |
| Compression Strength Perpendicular to Grain: |
3.4 Mpa (N/mm² or MN/m²) |
| Shear Strength Parallel to Grain: |
5.6 MPa (N/mm² or MN/m²) |
| Moisture Meter Reading Corrections |
| Moisture Meter Reading Corrections: | |
| Fire Indicies |
Ignitability Index:
(NZ/AS 1530.3) | 14 |
Flame Spread Index:
(NZ/AS 1530.3) | 10 |
Heat Evolved Index:
(NZ/AS 1530.3) | 9 |
Smoke Developed Index:
(NZ/AS 1530.3) | 4 |
Flame Spread Index:
(ASTM E84) |
70 |
Smoke Developed index:
(ASTM E84) |
213 |
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