Discover the Strength of Boxed Heart and Free of Heart Timber Posts
- Robert Lee
- Dec 1, 2025
- 2 min read
Updated: Jan 19
At North Eden Timber, we offer a range of high-quality timber posts perfect for various applications, including deck sub-frames, fencing, and construction. Our durable hardwood posts provide exceptional strength and longevity, making them ideal for outdoor settings. Additionally, our specialty feature posts highlight the natural beauty of Australian hardwood, adding character to architectural and decorative projects.
Understanding Boxed Heart (BH) Timber Posts
Boxed Heart (BH) posts contain the central heartwood of the tree. This means the natural growth stresses are retained within the post. While BH posts are strong and cost-effective, they are more prone to splitting and checking as they dry. They are commonly used in applications where movement or cracks are not a concern. We predominantly stock Ironbark, Spotted Gum, and Red Gum, although we can also source other species.
Characteristics of Boxed Heart Timber
The growth rings wrap around the center.
Prone to checking, splitting, and twisting as the timber dries.
Usually more economical due to higher yield from the log.
Common in larger section posts such as 200×200mm or 150×150mm.
Best Suited For Boxed Heart Timber
Rural fencing.
Landscaping.
Low aesthetic-requirement projects.
Where some movement is acceptable.
Boxed Heart Post Sizes
Rough Sawn (mm) | 150x150 | 175x175 | 200x200 | 250x250 | 300x300 |
Dressed (mm) | 135x135 | 160x160 | - | - | - |
Exploring Free of Heart (FOH) Timber Posts
Free of Heart (FOH) posts are cut to exclude the core (or heart) of the log. This reduces the risk of splitting, warping, and excessive movement. As a result, FOH posts are more stable and ideal for structural applications requiring precision and longevity. We stock FOH posts in Ironbark, Spotted Gum, and Red Gum, with other species available upon request.
Characteristics of Free of Heart Timber
Reduced checking, twisting, and bowing.
More uniform grain and appearance.
Ideal where straightness and long-term performance matter.
Less available and usually higher cost due to selective cutting.
Best Suited For Free of Heart Timber
Structural posts and beams.
Architectural and visible applications.
Pergolas, decks, feature posts, and commercial builds.
Coastal and high-traffic environments.
Free Of Heart Post Sizes
Rough Sawn (mm) | 100x100 | 125x125 | 150x150 |
Dressed (mm) | 90x90 | 115x115 | 135x135 |
Final Thoughts on Timber Selection
Both Free of Heart and Boxed Heart timber have important roles in construction and landscaping. Understanding how each behaves ensures better project outcomes, fewer defects, and improved long-term performance.
If you need assistance selecting FOH or BH posts for your next project, reach out—we are happy to help. Our commitment to providing innovative, premium architectural timber products made from ethically sourced Australian native hardwoods sets us apart. Together, we can create beautiful, sustainable spaces that stand the test of time.
