When quality, performance, and long-term stability matter, the way a timber is cut makes a significant difference. One of the most important distinctions in timber products is whether the beam is Free of Heart Center (FOHC) or boxed-heart—and understanding that difference can help prevent costly problems down the road.
What Does FOHC Mean?
FOHC stands for Free of Heart Center.
In FOHC timbers, the heart center of the log is removed during milling so that all growth rings are fully cut.
This design allows the wood to dry evenly, rather than trapping moisture at the center of the beam.
Why the Heart Center Matters
The heart center of a log holds moisture longer than the surrounding wood. When it remains intact—as it does in boxed-heart timbers—moisture becomes trapped inside the growth rings.
As that moisture eventually tries to escape, the timber reacts. This often leads to:
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Twisting
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Bowing
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Checking
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Splitting
These movements are not defects in craftsmanship—they are natural reactions to uneven drying.
FOHC timbers eliminate this issue by allowing moisture to release evenly from all sides.
The Benefits of FOHC Timbers
Because the growth rings are fully cut, FOHC timbers offer several important advantages:
Improved Stability
Even drying reduces internal stress, helping beams stay straighter over time.
Greater Strength
With less internal tension and distortion, FOHC timbers maintain their structural integrity more consistently.
Reduced Warping and Splitting
By avoiding trapped moisture, FOHC timbers are far less likely to twist, bow, or split as they acclimate.
Better Long-Term Performance
FOHC timbers are especially well-suited for applications where appearance and durability matter long after installation.
FOHC vs. Boxed-Heart Timbers
FOHC Timbers
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Heart center removed
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Growth rings fully cut
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Even moisture release
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Increased stability and straightness
Boxed-Heart Timbers
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Heart center retained
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Moisture trapped inside growth rings
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Higher risk of warping, bowing, and splitting
For builders and designers focused on quality and longevity, FOHC timbers offer a clear advantage.
Where FOHC Timbers Are Commonly Used
FOHC timbers are ideal for:
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Structural beams
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Exposed architectural elements
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Residential and commercial builds
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Projects where straightness and appearance matter
They are often chosen when performance expectations are high and material movement must be minimized.
Choosing the Right Timber for Your Project
Not every project has the same requirements, but when stability, strength, and predictability are priorities, FOHC timbers are a smart choice. Understanding how the timber was milled helps set realistic expectations—and prevents issues that can arise after installation.
Final Thought
The FOHC difference comes down to one simple principle: even drying leads to better performance.
By removing the heart center and allowing growth rings to dry naturally, FOHC timbers provide a stronger, straighter, and more reliable product—especially when compared to boxed-heart alternatives.
Ready to Order FOHC Timbers?
Contact us today to order the timber you need for your next build.