Hura crepitans

Hura crepitans
Household: Euphorbiaceae
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Hura

Possumwood

Different Widespread Names:
Arbol del diablo, Haba (Mexico), Jabillo (Central America), Ceiba amarilla,
Ceiba de Leche (Colombia), Ceiba blanca, Ceiba habillo (Venezuela), Assacu, Acacu
(Brazil).

 

Distribution:
All through the West Indies and from Central America to northern Brazil

and Bolivia. 
Usually happens in almost pure stands in Surinam on moist sandy loam.

Ceaselessly cultivated for shade.

 

The Tree: Generally
reaches heights of 90 to 130 ft with clear boles of 40 to 75 ft; diameters of three
to five ft and at instances 6 to 9 ft. 
Bushes usually have small buttresses; bark lined with conical spines.

 

The Wooden:

Normal Traits: Heartwood pale yellowish brown or pale olive grey; sapwood yellowish
white usually vague from heartwood. 
Texture superb to medium; luster excessive; grain straight to interlocked;
with out distinctive odor or style.

 

Weight: Fundamental
particular gravity (ovendry weight/inexperienced quantity) 0.33 to 0.38; air- dry density
25 to 28 pcf.

 

Mechanical Properties:
(First and third units of knowledge based mostly on the 2-in.  customary; second set on the 2-cm customary.)

 

Moisture content material  
Bending energy  
Modulus of elasticity  
Most crushing energy

            (%)                  (Psi)             
              (1,000
psi)       
           (Psi)

Inexperienced (74)            
      6,310             
             1,040                  
        2,790

12%                   
         8,710             
             1,170                  
        4,800

 

Inexperienced (48)            
      5,100                     
        820                  
        2,270

15%                   
         8,000               
              NA                     
     3,860

 

12% (44)              
      7,050               
              895                           NA

 

Janka facet hardness 440 lb for inexperienced materials and 550 lb at
12% moisture content material. Forest Merchandise Laboratory toughness common for inexperienced
and dry materials is 70 in.-lb. (5/8-in. 
specimen).

 

Drying and Shrinkage:
Reasonably troublesome to air-dry; with variable warping, generally extreme.  Checking is slight.  Dry kiln schedule T6-D2 is recommended
for 4/Four inventory and schedule T3-D1 for 8/4. 
Shrinkage inexperienced to ovendry: radial 2.7%; tangential 4.5%; volumetric
7.3%.  Motion in place is rated
as medium.

 

Working Properties:
The wooden often machines simply however inexperienced materials is considerably troublesome to
work because of pressure wooden, leading to fuzzy surfaces.  The wooden finishes nicely and is simple to
glue and nail.

 

Sturdiness: The wooden
is reported to be very variable in resistance to assault by decay fungi; extremely
prone to blue stain and really prone to dry-wood termites.

 

Preservation: The
wooden is simple to deal with, with absorption to 20 pcf utilizing an open-tank course of.

 

Makes use of: Normal
carpentry, bins and crates, veneer and plywood, joinery, furnishings,
fiberboard, and particleboard.

 

Extra Studying:
(44), (46), (48), (74)

 

44.  Llach, C.
L. 1971.  Properties and makes use of of
113 timber-yielding species of Panama. 
            Half
3. Bodily and mechanical properties of 113 tree species.  FO-             UNDP/PAN/6.  FAO, Rome.

46.  Longwood,
F. R. 1962.  Current and potential
business timbers of the Caribbean. 
            Agriculture
Handbook No.  207.  U.S.  Division of Agriculture.

48.  Mainieri,
C. 1971.25 madeiras da Amazonia de valor comercial, caracterizacao,             macroscopica,
usos comuns, e indices qualificativos. 
Publicacao, Inst.  de Pesqu.
            tec.  So Paulo No.  798.

74.  Wangaard,
F. F., and A. F. Muschler. 
1952.  Properties and makes use of
of tropical woods,             III.  Tropical Woods 98:1-190.

 

From: Chudnoff, Martin. 1984. Tropical Timbers of the
World. USDA Forest Service. Ag. Handbook No. 607.

 

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