Scientific Name
Populus tremuloides
Trade Name
Quaking aspen
Family Name
Salicaeae


Common Names
Alamo tremblon, Aspe, Aspen, Canadian aspen, Espe, Peuplier tremble, Quaking aspen, Trembling aspen, Zitterpappel
Regions of Distribution
Central America, North America
Countries of Distribution [VIEW MAP]
Canada, Mexico, United States
Common Uses
Bearings & bushings, Beehives, Boxes and crates, Brooders, Building construction, Cabin construction, Casks, Clothespins, Construction, Cooperages, Core Stock, Decorative veneer, Excelsior, Figured veneer, Flooring, Food containers, Furniture, Jewelry box, Matchboxes, Matches, Musical instruments, Packing cases, Pallets, Particleboard, Plywood, Poultry coops, Pulp/Paper products, Pulpwood, Rough construction, Sporting Goods, Turnery, Veneer
Environmental Profile
| Status has not been officially assessed |
Distribution Overview
Quaking or Trembling aspen is considered to be the most widely distributed tree in North America. It grows from Alaska to Newfoundland and southward to Virginia. It also occurs in the Rocky Mountains, extending south to southern Arizona and northern New Mexico. It grows from near sea level to an elevation of 6500 to 10,000 feet (1981 to 3048 m) throughout its range. The tree often occurs in pure stands, and grows in many soil types, especially sandy and gravelly slopes.
Heartwood Color
| Brown | ||||||||||||
| Red | ||||||||||||
| Pink | ||||||||||||
| Yellow | ||||||||||||
| Green/grey | ||||||||||||
| Purple | ||||||||||||
| Orange | ||||||||||||
| White to cream | ||||||||||||
| Greenish to greyish | ||||||||||||
| Pale brown | ||||||||||||
| Yellowish brown | ||||||||||||
| Brown |
Sapwood Color
| White | ||||||||||||
| Yellow | ||||||||||||
| Brown | ||||||||||||
| Red | ||||||||||||
| Pink | ||||||||||||
| White to yellow | ||||||||||||
| Same as heartwood | ||||||||||||
| White/Cream | ||||||||||||
| Sapwood blends into heartwood | ||||||||||||
| Paler than heartwood |
Grain
| Straight | ||||||||||||
| Figure | ||||||||||||
| Even | ||||||||||||
| Growth rings (figure) | ||||||||||||
| Mottled (figure) |
| Straight | ||||||||||||
| Mottled figure | ||||||||||||
| Generally straight, but not always | ||||||||||||
| Clear growth rings (figure) |
Texture
| Fine | ||||||||||||
| Medium | ||||||||||||
| Uniform | ||||||||||||
| Coarse | ||||||||||||
| Even or uniform | ||||||||||||
| Fine | ||||||||||||
| Fine and uniform |
Luster
| High | ||||||||||||
| Medium | ||||||||||||
| Low | ||||||||||||
| Silky luster |
Natural Durability
| Susceptible to insect attack | ||||||||||||
| Non-durable | ||||||||||||
| Non-resistant to termites | ||||||||||||
| Non-resistant to powder post beetles | ||||||||||||
| Perishable | ||||||||||||
| Non-resistant to marine borers | ||||||||||||
| Non durable | ||||||||||||
| Susceptible to attack from powder post (Lyctid & Bostrychid) beetles | ||||||||||||
| Perishable |
Odor
| Seasoned wood has no odor or taste | ||||||||||||
| No distinctive taste | ||||||||||||
| Green wood has disagreeable smell |
Kiln Schedules
| UK=E US=T6D2/T3D1 Fr=5 | ||||||||||||
| T110 (8/4) US | ||||||||||||
| T109 (4/4) US | ||||||||||||
| T12-E7 (4/4) | ||||||||||||
| T10-E6 (8/4) | ||||||||||||
| Schedule E (4/4) United Kingdom |
Wet streaks.
Wet streaks.
Drying Defects
| Distortion | ||||||||||||
| Extension of Existing Shakes | ||||||||||||
| Checking | ||||||||||||
| Moderate twist/warp | ||||||||||||
| Moderate collapse and honeycombing | ||||||||||||
| If proper precautions are not taken timber may warp and twist | ||||||||||||
| Expect moderate degrade from water pockets. |
Ease of Drying
| Moderately Difficult to Difficult | ||||||||||||
| Fairly Easy | ||||||||||||
| Rapidly | ||||||||||||
| Thick Stock Requires Care | ||||||||||||
| Slowly | ||||||||||||
| Moderate | ||||||||||||
| Shrinkage is often moderate | ||||||||||||
| Requires careful piling to prevent distortion | ||||||||||||
| Easy |
Kiln Drying Rate
| Naturally dries at a moderate speed | ||||||||||||
| Naturally dries quickly |
Tree Identification
| Bole/stem form is straight |
Tree Size
| Tree height is 20-30 m | ||||||||||||
| Bole length is 10-20 m | ||||||||||||
| Tree height is 30-40 m | ||||||||||||
| Sapwood width is 0-5 cm | ||||||||||||
| Bole length is 20-30 m | ||||||||||||
| Tree height is 10-20 m | ||||||||||||
| Bark width is 0-5 mm | ||||||||||||
| Sapwood width is 5-10 cm | ||||||||||||
| Trunk diameter is 100-150 cm |
Deriving its name from its leaves which are inclined to tremble in the slightest breeze, Trembling or Quaking aspen. The twigs and foliage of the tree are eaten by deer, elk, and moose, as well as sheep and goats. Beavers, rabbits, and other mammals are also reported to feed on the bark, foliage, and buds, and winter buds are a food source for grouse and quails.
Product Sources
Wood produced by Trembling and Bigtooth aspens are difficult to differentiate and are mixed and marketed together under the trade name Aspen.
Comments
General finishing qualities are rated as good
General finishing qualities are rated as satisfactory
Tension wood often present
Blunting Effect
| Moderate | ||||||||||||
| Slight | ||||||||||||
| Blunting effect on machining is slight |
Boring
| Fairly easy to very easy | ||||||||||||
| Fair to good results | ||||||||||||
| Moderately easy | ||||||||||||
| Easy | ||||||||||||
| Bored areas of tension wood tend to rough |
Average number of bored pieces reported to produce good to excellent holes = 78).
Carving
| Fairly Easy to Very Easy |
Cutting Resistance
| Fairly Difficult to Very Difficult to saw | ||||||||||||
| Easy to saw | ||||||||||||
| Moderate to saw | ||||||||||||
| Easy to saw |
Gluing
| Fairly Difficult to Very Difficult | ||||||||||||
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Easy to glue | ||||||||||||
| Moderate gluing properties | ||||||||||||
| Good gluing properties |
Mortising
| Fairly Easy to Very Easy | ||||||||||||
| Satisfactory mortising properties | ||||||||||||
| An average of 60% yield excellent results |
Moulding
| Fairly Easy to Very Easy | ||||||||||||
| Very poor (an average of 7% yield good results) |
Movement in Service
| Fair to Good Stability – Medium Movement | ||||||||||||
| Stable | ||||||||||||
| Small | ||||||||||||
| Dimensionally stable after seasoning |
Nailing
| Holds satisfactorily | ||||||||||||
| Nails hold poorly | ||||||||||||
| Easy to nail | ||||||||||||
| Satisfactory nailing properties | ||||||||||||
| Holds nails well |
Planing
| Fair to Good Results | ||||||||||||
| Fairly Difficult to Very Difficult | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Very Good to Excellent Results | ||||||||||||
| Ease of planing is moderate | ||||||||||||
| Requires very sharp and thin cutting angles | ||||||||||||
| On average of 21 pieces out a hundred yield excellent results | ||||||||||||
| Areas of tension wood are difficult to plan and yield fuzzy surfaces |
Resistance to Abrasion
| Highly resistant to wear |
Resistance to Impregnation
| Resistant heartwood | ||||||||||||
| Resistant sapwood | ||||||||||||
| Permeable sapwood | ||||||||||||
| Heartwood is highly resistant | ||||||||||||
| Sapwood is moderately resistant | ||||||||||||
| Sapwood is resistant | ||||||||||||
| Sapwood is moderately resistant | ||||||||||||
| Heartwood is resistant |
Resistance to Splitting
| Good |
Response to Hand Tools
| Easy to Work | ||||||||||||
| Fairly Difficult to Difficult to Work | ||||||||||||
| Responds Readily | ||||||||||||
| Easy to machine | ||||||||||||
| Moderate working qualities |
Routing & Recessing
| Fairly Easy to Very Easy |
Sanding
| Fairly Easy to Very Easy | ||||||||||||
| Good sanding finish |
Screwing
| Screwing yields good results | ||||||||||||
| Screwing yields satisfactory results | ||||||||||||
| Satisfactory screwing properties |
Turning
| Fairly Easy to Very Easy | ||||||||||||
| Very Good to Excellent Results | ||||||||||||
| Fair to Good Results | ||||||||||||
| Good results | ||||||||||||
| Fairly good response (70% yield excellent results) |
Veneering Qualities
| Suitable for peeling | ||||||||||||
| Veneers easily | ||||||||||||
| Suitable for slicing | ||||||||||||
| Difficult to veneer | ||||||||||||
| Veneers moderately easy | ||||||||||||
| Easy to cut | ||||||||||||
| There is slight to moderate drying degrade and the potential for buckles and splits | ||||||||||||
| Suitable for slicing | ||||||||||||
| Suitable for peeling | ||||||||||||
| Moderately easy to veneer | ||||||||||||
| Converts readily into veneers |
Crotches are occasionally available which are used to produce veneers with attractive mottled figure and streaks of pink, orange and golden colors.
Steam Bending
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Painting
| Satisfactory results | ||||||||||||
| Good results |
Polishing
| Fair to Good Results | ||||||||||||
| Very Good to Excellent Results | ||||||||||||
| Satisfactory results |
Staining
| Fair to Good Results | ||||||||||||
| Finish is generally satisfactory | ||||||||||||
| Woolly surfaces cause uneven staining | ||||||||||||
| Finish is generally good | ||||||||||||
| Boring, mortising, and other machining properties are generally satisfactory |
Strength Properties
| Density (dry weight) = 23-30 lbs/cu. ft. | ||||||||||||
| Density = low | ||||||||||||
| Bending strength (MOR) = low | ||||||||||||
| Max. crushing strength = low | ||||||||||||
| Hardness (side grain) = very soft | ||||||||||||
| Modulus of Elasticity (stiffness) = very low | ||||||||||||
| Shrinkage, Radial = small | ||||||||||||
| Max. crushing strength = medium | ||||||||||||
| Bending strength (MOR) = very low | ||||||||||||
| Weight = moderate | ||||||||||||
| Toughness-Hammer drop (Impact Strength) = very low | ||||||||||||
| Toughness-Hammer drop (Impact Strength) = low | ||||||||||||
| Shrinkage, Tangential = moderate | ||||||||||||
| Shrinkage, Tangential = fairly large | ||||||||||||
| Shearing strength (parallel to grain) = very low | ||||||||||||
| Modulus of Elasticity (stiffness) = low | ||||||||||||
| Max. crushing strength (stiffness) = very low | ||||||||||||
| Low resistance to denting and marring | ||||||||||||
| Hardness (side grain) = soft | ||||||||||||
| Density = medium | ||||||||||||
| Crushing strength = low | ||||||||||||
| Bending strength (MOR) = medium |
Shearing strength (parallel to grain) = medium
Numerical Data
| Item | Green | Dry | English |
| Bending Strength | 5300 | 8483 | psi |
| Crushing Strength | 176 | 363 | psi |
| Density | 26 | lbs/ft3 | |
| Hardness | 337 | lbs | |
| Impact Strength | 22 | 21 | inches |
| Maximum Crushing Strength | 2282 | 4263 | psi |
| Shearing Strength | 875 | psi | |
| Stiffness | 983 | 1239 | 1000 psi |
| Work to Maximum Load | 5 | 7 | inch-lbs/in3 |
| Specific Gravity | 0.33 | 0.35 | |
| Weight | 25 | 21 | lbs/ft3 |
| Radial Shrinkage | 3 | % | |
| Tangential Shrinkage | 7 | % | |
| Volumetric Shrinkage | 12 | % | |
| Item | Green | Dry | Metric |
| Bending Strength | 372 | 596 | kg/cm2 |
| Crushing Strength | 12 | 25 | kg/cm2 |
| Density | 416 | kg/m3 | |
| Hardness | 152 | kg | |
| Impact Strength | 55 | 53 | cm |
| Maximum Crushing Strength | 160 | 299 | kg/cm2 |
| Shearing Strength | 61 | kg/cm2 | |
| Stiffness | 69 | 87 | 1000 kg/cm2 |
| Work to Maximum Load | 0.35 | 0.49 | cm-kg/cm3 |
| Specific Gravity | 0.33 | 0.35 | |
| Weight | 400 | 336 | kg/m3 |
| Radial Shrinkage | 3 | % | |
| Tangential Shrinkage | 7 | % |
References
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