Scientific Name
Engelhardtia chrysolepis
Trade Name
Taiwan engelhardtia
Family Name
Juglandaceae
Common Names
Cheo, Cheo tia, Taiwan engelhardtia
Regions of Distribution
Oceania and S.E. Asia
Countries of Distribution [VIEW MAP]
Cambodia, China, Laos, Myanmar, Thailand, Vietnam
Common Uses
Beams, Bedroom suites, Boxes and crates, Building materials, Cabinetmaking, Casks, Core Stock, Decorative plywood, Decorative veneer, Domestic flooring, Drawer sides, Excelsior, Factory construction, Factory flooring, Figured veneer, Flooring, Furniture , Joinery, Joists, Kitchen cabinets, Living-room suites, Office furniture, Packing cases, Parquet flooring, Plain veneer, Plywood, Poles, Porch columns, Radio – stereo – TV cabinets, Rough construction, Structural plywood, Structural work, Studs, Sub-flooring, Turnery, Utility plywood, Utility poles, Veneer
Environmental Profile
| Little threat to its survival, at least in the immediate future | ||||||||||||
| Generally secure within its natural habitat | ||||||||||||
| Data source is World Conservation Monitoring Center |
Distribution Overview
Southeast Asia (Burma, Cambodia, Laos, Thailand, China, and Taiwan).
Heartwood Color
| Yellow | ||||||||||||
| Brown | ||||||||||||
| Orange | ||||||||||||
| Red | ||||||||||||
| Grey brown |
Sapwood Color
| White | ||||||||||||
| Yellow | ||||||||||||
| Color not distinct from heartwood |
Grain
| Even | ||||||||||||
| Straight |
| Straight |
Texture
| Medium | ||||||||||||
| Coarse | ||||||||||||
| Even textured | ||||||||||||
| Coarse |
Luster
| Low | ||||||||||||
| Medium |
Natural Durability
| Durable | ||||||||||||
| Very durable | ||||||||||||
| Resistant to termites | ||||||||||||
| Susceptible to insect attack | ||||||||||||
| Resistant to powder post beetles | ||||||||||||
| Non durable |
Should be protected from weather and ground contact
Toxicity
| Some toxic effects |
Drying Defects
| Splitting | ||||||||||||
| Checking | ||||||||||||
| Distortion | ||||||||||||
| Warping can be expected | ||||||||||||
| End splitting |
Ease of Drying
| Moderately Difficult to Difficult | ||||||||||||
| Rapidly | ||||||||||||
| Slowly | ||||||||||||
| Little degrade if dried properly | ||||||||||||
| Easy | ||||||||||||
| Dries at a fairly rapid rate |
Kiln Drying Rate
| Drying rate is slow | ||||||||||||
| Very slow | ||||||||||||
| Naturally dries at a moderate speed | ||||||||||||
| Naturally dries quickly | ||||||||||||
| Slow |
Tree Size
| Tree height is 40-50 m | ||||||||||||
| Sapwood width is 5-10 cm | ||||||||||||
| Bark width is 5-10 mm | ||||||||||||
| Bole length is 20-30 m | ||||||||||||
| Sapwood width is 0-5 cm | ||||||||||||
| Bark width is 15-20 mm | ||||||||||||
| Tree height is 30-40 m | ||||||||||||
| Bark width is 10-15 mm | ||||||||||||
| Trunk diameter is 150-200 cm |
High buttresses and is rarely of good form
Blunting Effect
| Moderate | ||||||||||||
| Medium effect |
Boring
| Fairly easy to very easy | ||||||||||||
| Fair to good results | ||||||||||||
| Satisfactory properties |
Carving
| Fairly Easy to Very Easy | ||||||||||||
| Satisfactory results |
Cutting Resistance
| Fairly Difficult to Very Difficult to saw | ||||||||||||
| Moderate to saw | ||||||||||||
| Good sawing properties | ||||||||||||
| Cutting edges are dulled rapidly |
Gluing
| Surface Preparation | ||||||||||||
| Fair to Good Results | ||||||||||||
| Fairly Difficult to Very Difficult | ||||||||||||
| Carefully Controlled Conditions | ||||||||||||
| Glues well |
Mortising
| Fairly Easy to Very Easy | ||||||||||||
| Satisfactory mortising properties |
Moulding
| Fairly Easy to Very Easy | ||||||||||||
| Satisfactory properties |
Nailing
| Fairly Easy to Very Easy | ||||||||||||
| Fair to Good Results | ||||||||||||
| Holds nails well |
Planing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Very Good to Excellent Results |
The wood is reported to generally plane well, but surfaces are occasionally fibrous.
Resistance to Impregnation
| Resistant heartwood | ||||||||||||
| Permeable sapwood | ||||||||||||
| Resistant sapwood | ||||||||||||
| Sapwood is moderately resistant | ||||||||||||
| Heartwood is resistant |
Response to Hand Tools
| Easy to Work | ||||||||||||
| Fairly Difficult to Difficult to Work | ||||||||||||
| Fairly good |
Routing & Recessing
| Fairly Easy to Very Easy |
Sanding
| Fairly Easy to Very Easy | ||||||||||||
| Satisfactory |
Screwing
| Fairly Easy to Very Easy |
Turning
| Fairly Easy to Very Easy | ||||||||||||
| Responds satisfactorily |
Painting
| Surface Preparation | ||||||||||||
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Polishing
| Fair to Good Results | ||||||||||||
| Very Good to Excellent Results |
Varnishing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Numerical Data
| Item | Green | Dry | English |
| Bending Strength | 8820 | 13328 | psi |
| Maximum Crushing Strength | 4410 | 7595 | psi |
| Shearing Strength | 1862 | psi | |
| Stiffness | 1519 | 1764 | 1000 psi |
| Item | Green | Dry | Metric |
| Bending Strength | 620 | 937 | kg/cm2 |
| Maximum Crushing Strength | 310 | 533 | kg/cm2 |
| Shearing Strength | 130 | kg/cm2 |
References
Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1