Poplar — flat_sawn
Specimen #244

Poplar — Identification, Uses and Properties

Populus p.p. Salicaceae

Sawn timber appearance grading According to French standard NF EN 975-2 (November 2004) Possible grading for square-edged timber: Choice 1, choice 2, choice 3, choice 4 Visual structure grading According to European standard EN 1912 (2012) and associated national standards (see explanatory note), strength classes C18, C22, C24 or C27 can be provided by visual grading. Strength classes C18 or C24 can be provided by visual grading according to French standard NF B 52-001-1 (2011).

The strong tendancy of Poplar to be wooly makes its finish delicate.

HARDWOOD NORTH AMERICA, EUROPE MATCHES

Taxonomy & Nomenclature

Botanical Name(s)

Populus p.p.

Family

Salicaceae

Wood type

Hardwood

Local Names

Pappel (Germany), Alamo (Spain), Cottonwood (United States), Peuplier (France), Pioppo (Italy), Poplar (United Kingdom), forestry and timber centre, Châlons-en-Champagne (France). (Outdoor covering (sheltered) in heat-treated Poplar, regional)

Origin Region

North America, Europe

Main End Uses

Matches · Framing · Boxes and crates · Veneer for back or face of plywood · Veneer for interior of plywood · Built-in furniture or mobile item · Moulding · Fibre or particle boards · Pulp

Wood Identification Guide

Reference Colour

White

Texture

Fine

Grain

Straight

Sapwood

Not demarcated

Interlocked Grain

Absent

Notes

Wood is white, often greyish or very pale brown.

Wood Identifier App

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Log Description

Diameter

30 to 60 cm cm

Sapwood Thickness

Not applicable cm

Buoyancy

Not applicable

Log Conservation

Low (treatment necessary)

Diameter

11.8 to 23.6 in in

Sapwood Thickness

Not applicable in

Physical & Mechanical Properties

Density

0.45 g/cm³ @ 12% MC

Density

28.1 lb/ft³

Monnin Hardness

1.3

Janka Hardness

390 lbf

Janka Hardness

1,735 N

Volumetric Shrinkage Coefficient

0.45 % / %

Tangential Shrinkage

8.3 %

Radial Shrinkage

4.8 %

T/R Anisotropy Ratio

1.7

Fibre Saturation Point

30 %

Thermal Conductivity

0.16 W/m·K

Thermal Conductivity

0.092 BTU/(h·ft·°F)

Lower Heating Value

18,430 MJ/kg

Lower Heating Value

7,923 BTU/lb

Crushing Strength

35 MPa

Crushing Strength

5,076 psi

Bending Strength (MOR)

62 MPa

Bending Strength (MOR)

8,992 psi

Modulus of Elasticity (MOE)

9,800 MPa

Modulus of Elasticity (MOE)

1,421,370 psi

Durability & Treatment

Resistance to Decay

Class 5 - non-durable

Dry Wood Borers

Class S - susceptible (risk in all the wood) Cross sections of Populus alba

Termites

Class S - susceptible

Treatability

Class 3 - poorly treatable

Use Class

Class 1 - inside (no risk of dampness)

Preservation Requirements

Against Dry Wood Borers

This wood requires appropriate preservation treatment

Temporary Humidification

This wood requires appropriate preservation treatment

Notes

This species is listed in the NF EN 350 standard. Treatability of heartwood is variable.

Drying Schedule & Risks

Drying Rate

Rapid to normal

Risk Distortion

Slight risk

Risk Case Hardening

Yes

Risk Checking

Slight risk

Risk Collapse

Yes

Suggested Schedule

Schedule #3 (see explanatory note)

Sawing & Machining

Blunting Effect

Normal

Machining Tools

Ordinary

Suitability Peeling

Good

Suitability Slicing

Good

Notes

Keep tools very sharp to prevent fuzzy surfaces.

Assembling & Finishing

Nailing Screwing

Good

Fire Safety & Ratings

French Grading Thick Gt14mm

M3 (moderately flammable) Thickness < 14 mm: M4 (readily flammable) Euroclass grading. 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.

French Grading Thick Lt14mm

M4 (readily flammable) Euroclass grading. 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.

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

Poplars come from the temperate area of the northern
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