24th February 2004

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American red elm (Ulmus rubra)

Other names: Slippery elm, brown elm

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Distribution

The Eastern to Mid-West USA.

General description

Red elm has a greyish white to light brown narrow sapwood, with heartwood that is reddish brown to dark brown in colour. The grain can be straight, but is often interlocked. The wood has a coarse texture. (American grey elm is now only available in very limited volume.)

Working properties

The wood of red elm is fairly easy to work, it nails, screws and glues well, and can be sanded, stained and polished to a good finish. It dries well with minimum degrade and little movement in performance.

   
Machining
Nailing
Screwing
Gluing
Finishing

Physical properties

Elm is moderately heavy, hard and stiff with excellent bending and shock resistance. It is difficult to split because of its interlocked grain.

Specific Gravity: 0.53 (12% M.C.)
Average Weight: 593 kg/m3 (12% M.C.)
Average Volumetric Shrinkage: 11% (Green to 6% M.C.)
Modulus of Elasticity: 10,274 MPa
Hardness: 3825 N

Durability

Rated as non-resistant to heartwood decay, and classed as permeable to preservatives.

Availability

USA: Limited in both lumber and veneer as supply is threatened by Dutch elm disease, but more available in the south.
Export: Limited.

Main uses

Furniture, cabinet making, flooring, internal joinery, panelling and coffins.

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