Collection: Box Brush

Brush Box is a medium to large Australian hardwood that grows along the rainforest edges from the central coast of New South Wales up to Bowen in Queensland. Known for its striking appearance and durability, Brush Box is a sought-after timber for various applications, especially in areas requiring resistance to wear and splintering.

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Appearance of Brush Box Timber

The heartwood of Brush Box ranges from a greyish pink to a rich reddish brown, contrasting with its paler sapwood. With a fine, even texture and an interlocked grain, Brush Box is ideal for appearance-based applications like flooring, though the interlocked grain can cause distortion during drying. Free from gum veins, Brush Box’s unique grain pattern brings warmth and elegance to any interior space.

Common Applications of Brush Box Timber

Brush Box is widely used for flooring, cladding, paneling, and select structural applications. Its durability and resistance to wear also make it suitable for heavy-use items such as mallets, mauls, handles, shuttles, and boat building. It is occasionally used in more robust applications, including bridge decking, wharf construction, weatherboarding, and wedges, showcasing its versatility and strength.

Workability of Brush Box Timber

While Brush Box is durable and attractive, its workability can be challenging. The wood’s density, interlocked grain, and silica content may cause tool edges to wear quickly and make nailing or screwing susceptible to splitting. Its natural waxiness (due to arjunolic acid) can complicate adhesive use but provides an excellent base for paints and stains. Although unsuitable for steam bending, Brush Box resists splintering and wear effectively, making it ideal for high-traffic areas and demanding applications.

Origin and Availability of Brush Box Timber

Sourced from native forests along Australia’s eastern coast, Brush Box is primarily available in New South Wales and Queensland. While it may be limited outside these regions, Kosny Timber provides access to this distinct hardwood for clients seeking its durability and aesthetic appeal.

 Very LowLowMediumHighVery High
   Check markCheck markCheck mark
Tangential :    9.70%
Radial :    4.40%
Unit Movement Tangential:   0.38% 
Unit Movement Radial:  0.24%  

Very High

High

Reasonably High

Medium High

Medium

Reasonably Low

Low

Very Low

Unseasoned:

S1

S2

S3

S4

S5

S6

S7

S8

Check mark

Seasoned:

SD1

SD2

SD3

SD4

SD5

SD6

SD7

SD8

Check mark
 Structural
No. 1
Structural
No. 2
Structural
No. 3
Structural
No. 4
Structural
No. 5
Unseasoned:F17F14F11F8F7
Seasoned:F27F22F17F14F11
Seasoned:

 

890kg/m3

 

Unseasoned:

 

1190kg/m3

 

Very High

High

Reasonably High

Medium

Low

Very Low

Unseasoned:

J1

J2

J3

J4

J5

J6

Check mark

Seasoned:

JD1

JD2

JD3

JD4

JD5

JD6

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 White, yellow, pale straw to light brownPink to pink brownLight to dark redBrown, chocolate, mottled or streaky
  
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Modulus of Rupture - Unseasoned:77 MPa
Modulus of Rupture - Seasoned:121 MPa
Modulus of Elasticity - Unseasoned:12 GPa
Modulus of Elasticity - Seasoned:15 GPa
Maximum Crushing Strength - Unseasoned:39 MPa
Maximum Crushing Strength - Seasoned:64 MPa
Impact - Unseasoned:14 J
Impact - Seasoned:12 J
Toughness - Unseasoned:Medium - 15 - 24 Nm
Toughness - Seasoned:Medium - 15 - 24 Nm
Hardness - Unseasoned:7.8
Hardness - Seasoned:9.1
 LowModerateReasonably HighHigh
 (0 - 5 yrs)(5 - 15 yrs)(15 - 25 yrs)(more than 25 yrs)
In-Ground:Check mark  
 (0 - 7 yrs)(7 - 15 yrs)(15 - 40 yrs)(More than 40 yrs)
Above ground: Check mark  
 (0 - 20 yrs, usually < 5)(21 - 40 yrs)(41 - 64 yrs)(More than 60 yrs)
Marine Borer Resistance: Check mark 
Lyctid Borer Susceptibility:Not Susceptible
Lyctid Borer Susceptibility - Other: 
Termite Resistance:Resistant
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EFH Ignitibility:                    
 012345678910
EFH Spread-of-Flame Index:         
EFH Smoke-Developed Index:          

Critical Radiance Flux - Lower:

>2.2 and <4.5

Critical Radiance Flux - Higher:

≥4.5

Smoke Development Rate:

<750

1 - non-combustible2 - reasonably non-combustible3 - slightly combustible4 - combustible

Fire Properties Group
Number:

Average Specific Extinction Area:

<250

Bushfire Resistance:

BAL 12.5 and 19 – All AS3959 required applications