Cedar — flat_sawn
Specimen #62

Cedar — Identification, Uses and Properties

Cedrus atlantica Manetti Pinaceae

Sawn timber appearance grading No conventional grading rules. Sawn products are graded according to final uses.

This wood is interesting for structures requiring a good durability as well as a low

SOFTWOOD EUROPE TURNED GOODS

Taxonomy & Nomenclature

Botanical Name(s)

Cedrus atlantica Manetti

Family

Pinaceae

Wood type

Softwood

Local Names

Atlantische zeder (Germany), Cedro del Atlas (Spain), Cèdre de l’Atlas (France), Cedro dell’Atlante (Italy), Atlas cedar (United Kingdom)

Origin Region

Europe

Main End Uses

Turned goods · Heavy carpentry · Cabinetry (high-end furniture) · Exterior joinery · Interior joinery · House framing · Sliced veneer · Exterior panelling · Marquetry

Wood Identification Guide

Reference Colour

Yellow brown

Texture

Medium

Grain

Straight

Sapwood

Clearly demarcated

Interlocked Grain

Absent

Notes

Yellow brown to reddish brown. Cedar’s odour is strong and characteristic. It lasts a long time. A thin brown silver figure is visible with the naked eye on the quartersawn.

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Log Description

Tree height

65 – 115 ft

Tree height

20 – 35 m

Diameter

50 to 80 cm cm

Sapwood Thickness

4 to 10 cm cm

Buoyancy

Not applicable

Log Conservation

Good

Diameter

19.7 to 31.5 in in

Sapwood Thickness

1.6 to 3.9 in in

Physical & Mechanical Properties

Density

0.51 g/cm³ @ 12% MC

Density

31.8 lb/ft³

Monnin Hardness

2.4

Janka Hardness

720 lbf

Janka Hardness

3,203 N

Volumetric Shrinkage Coefficient

0.37 % / %

Tangential Shrinkage

6 %

Radial Shrinkage

4.1 %

T/R Anisotropy Ratio

1.5

Fibre Saturation Point

28 %

Thermal Conductivity

0.18 W/m·K

Thermal Conductivity

0.104 BTU/(h·ft·°F)

Lower Heating Value

19,120 MJ/kg

Lower Heating Value

8,220 BTU/lb

Crushing Strength

42 MPa

Crushing Strength

6,092 psi

Bending Strength (MOR)

82 MPa

Bending Strength (MOR)

11,893 psi

Modulus of Elasticity (MOE)

10,100 MPa

Modulus of Elasticity (MOE)

1,464,881 psi

Durability & Treatment

Resistance to Decay

Class 1-2 – very durable to durable

Dry Wood Borers

Class D - durable (sapwood demarcated, risk limited to sapwood)

Termites

Class M - moderately durable

Treatability

Class 3 - poorly treatable Cross sections of Cedrus atlantica

Use Class

Class 3 - not in ground contact, outside

Preservation Requirements

Against Dry Wood Borers

This wood does not require any preservation treatment

Temporary Humidification

This wood does not require any preservation treatment

Notes

Use class 3 only covers wood components without sapwood. This species is listed in the NF EN 350 standard (May 2013). According to the European standard NF EN 335 of May 2013, performance length might be modified by conditions in which it is used.

Drying Schedule & Risks

Drying Rate

Rapid

Risk Distortion

High risk

Risk Case Hardening

No known specific risk

Risk Checking

No risk or very slight risk

Risk Collapse

No known specific risk

Suggested Schedule

Schedule #4 (see explanatory note)

Sawing & Machining

Blunting Effect

Normal

Tooth For Sawing

Stellite-tipped

Machining Tools

Tungsten carbide

Suitability Peeling

Good

Suitability Slicing

Good

Notes

Small, very hard knots are present in the wood. Cedar yields good results in turnery.

Assembling & Finishing

Nailing Screwing

Good but pre-boring necessary

Fire Safety & Ratings

Euroclass

D-s2, d0 Default grading for solid wood that meets requirements of European standard NF EN 14081-1 (April 2016): structural graded timber in vertical uses and ceilings with minimal mean density of 0.35 and minimal thickness of 22 mm.

CITES & Trade Restrictions

CITES Status

No trade restrictions

Trade Notes

Comes from North Africa. Introduced in France in the
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