Sweet gum is a deciduous tree native to North America, known for its star-shaped leaves, corky bark, and spiky “gumballs.” While this versatile species has many uses and benefits, many want to know if sweet gum is a hardwood that’s suitable for their projects.
If you want to know more about it, our pros are here to provide answers and tips when working with this wood.
The Hardness of Sweet Gum
Sweet gum is a hardwood with a Janka hardness rating of 850 lbf (pounds-force), which places it in the mid-range of hardwoods. In addition to its medium hardness, sweet gum wood is known for its relatively low density, making it lighter than many other hardwoods.
The wood has an average specific gravity of around 0.5, lower than popular hardwoods like oak and maple. Despite its lower density, sweet gum wood still has good strength and durability, which makes it a popular choice for a variety of woodworking projects
One interesting aspect of sweet gum wood is that it can sometimes exhibit a unique property known as “figuring.” This refers to the appearance of unusual patterns and textures in the wood, which can add a distinctive and decorative element to furniture and other items.
Figuring is more common in sweet gum trees that have experienced stress or injury, such as from lightning strikes or insect damage. For comparison, we’ve prepared a table presenting other hardwoods and their Janka hardness ratings:
Wood Species | Janka Hardness Rating (lbf) |
Red Mahogany | 2,697 Ibf |
Hickory/Pecan | 1820 lbf |
Hard Maple | 1450 Ibf |
Red Oak | 1290 Ibf |
Cherry | 995 Ibf |
Birch | 1260 Ibf |
Ash | 1320 Ibf |
Walnut | 1010 Ibf |
Sweet Gum | 850 Ibf |
Black Spruce | 520 Ibf |
Redwood | 420 Ibf |
White Pine | 380 Ibf |
Aspen | 350 Ibf |
As you can see, sweet gum falls in the middle of the pack in terms of hardness. While it may not be the hardest hardwood, it still has a moderate level of hardness that makes it suitable for various uses.
Characteristics of Sweet Gum
Here are the significant qualities of Sweet Gum:
Ornamental value: Sweet gum is valued for its beautiful fall foliage, which adds a splash of vibrant color to landscapes.
Wood quality: Sweet gum wood is moderately heavy, hard, and strong, making it a valuable timber species for furniture, flooring, and paneling.
Medicinal properties: The fragrant resin produced by sweet gum trees has been used for centuries in traditional medicine to treat various ailments, including respiratory infections, sore throats, and digestive issues [1].
Adaptability: Sweet gum can grow in a wide range of habitats, from wetlands to upland forests, making it a highly adaptable species.
Ecosystem benefits: Sweet gum trees provide important ecological benefits, such as stabilizing soil, improving water quality, and providing habitat for wildlife.
Landscaping: Sweet gum is often planted as an ornamental tree due to its attractive foliage and fall color. Its deep root system also makes it a good choice for erosion control.
Economic value: The timber and resin sweet gum trees produce have economic value, making them important resources for the forestry industry and local economies.
We can say that Sweet gum is a versatile and valuable species with numerous significant qualities, from its aesthetic and ecological value to its medicinal and economic benefits. Here are some of the main characteristics of sweet gum:
- Hue: In the spring and summer, glossy, bright green. In the fall, vibrant colors, including yellow, orange, red, and even purple.
- Density: 0.50 to 0.60 g/cm3
- Hardness value: 850 lbf
- Stiffness: 1.73 to 14.49 GPa
- Type of wood: Ring-porous hardwood
- Common uses: furniture, flooring, cabinetry, veneer, boxes, and for medicinal and aromatic use.
Pros and Cons Of Sweet Gum
Pros
- Visual appeal
- Versatility
- Availability
- Sustainability
Cons
- Hardness
- Warping
- Density
- Resin pockets
Sweet gum is a versatile and attractive wood species that can be a good choice for many applications. However, it is important to be aware of its limitations and to take steps to mitigate potential issues when working with this wood.
Best Uses for Sweet Gum
Sweet gum wood is a versatile material that can be used in a variety of woodworking applications. Due to its combination of moderate hardness, low density, and unique aesthetic qualities, sweet gum is an excellent choice for many projects.
Some of the best uses for sweet gum include:
- Furniture
- Flooring
- Paneling
- Paper pulp
- Tool handles
- Firewood
- Medicinal purposes
- Crafts
- Landscaping
- Musical Instruments
- Decorative objects
In short, sweet gum is a versatile and sustainable hardwood that offers a unique combination of aesthetic and practical benefits, making it a valuable material for many woodworking projects.
The Strength of Sweet Gum
The wood of this tree is classified as medium-density hardwood, with a Janka hardness rating of 850 to 1,290 pounds-force (lbf). This puts it in the same category as woods like cherry and maple in terms of hardness.
In terms of its strength, Sweet Gum wood is known for its stiffness and resistance to bending. It also has good shock resistance, which makes it a good choice for tool handles and other applications where impact resistance is important.
More about the hardness of other wood types here:
Is it Hard To Split?
As for whether it is hard to split, Sweet Gum wood can be difficult to split because of its density and interlocked grain. However, it can be split successfully with the right tools and techniques.
Some woodworkers may choose to use a hydraulic splitter or a maul and wedge to split Sweet Gum logs, while others may opt for a chainsaw and splitting axe combination.
In any case, it is important to exercise caution and use appropriate safety gear when working with Sweet Gum wood.
Sweet Gum vs Maple’s Hardness
Wood Species | Janka Hardness Rating (lbf) |
Hard Maple | 1,450 |
Soft Maple | 950 |
Sweet Gum | 850-1,290 |
While all three kinds of wood are strong and durable, Hard Maple is often considered the most desirable for furniture, flooring, and other high-end woodworking projects due to its hardness and attractive grain patterns.
However, Soft Maple and Sweet Gum are popular choices for woodworking projects due to their strength, durability, and availability.
Sweet Gum vs Pine’s Hardness
Wood Species | Janka Hardness Rating (lbf) |
Yellow Pine | 870 |
Eastern White Pine | 380 |
Sweet Gum | 850-1290 |
Sugar Pine | 380 |
As you can see from the table, Sweet Gum is significantly harder than Pine, with a Janka hardness rating of 850-1,290 lbf, depending on the specific type of Sweet Gum. Eastern Pine and Sugar Pine, on the other hand, have a Janka hardness rating of only 380 lbf.
While Pine is softer and less dense than Sweet Gum, its unique characteristics make it a popular choice for certain woodworking applications. Pine is relatively easy to work with, lightweight, and has a distinctive grain pattern that can add character to a project.
It is often used for construction framing, cabinetry, and other interior applications. On the other hand, Sweet Gum is often used for furniture, flooring, and other high-end woodworking projects where strength and durability are important.
FAQ
Is sweet gum tree good for firewood?
Sweet Gum tree is not good for firewood because they can be difficult to split and may produce a lot of smoke when burned. However, it can be burned in a wood stove or fireplace if it is well-seasoned with other types of firewood, such as Oak or Hickory.
Can I use sweet gum for a cutting board?
Sweet Gum is a hardwood that can be used for cutting boards because of its hardness and durability. Though its interlocking grain can make it challenging to work with experts to select a defect-free piece, follow safety precautions, and use proper tools and techniques to work with it.
Conclusion
Sweet gum is a hardwood that’s durable enough with a challenging interlocking grain that requires effort but results in a beautiful finished product. It’s a sustainable choice that offers ecological benefits and is ideal for cutting boards, flooring, and furniture.
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