NEW ENGLAND BLACKBUTT

N. ENGLAND BLACKBUTT
N. ENGLAND BLACKBUTT2018-05-08T23:25:54+00:00

Project Description

WOOF Timber - New England Blackbutt

New England Blackbutt

Other Names

New England Ash, New England Peppermint, Eucalyptus campanulata

New England blackbutt is a large Australian hardwood from the tablelands of northern New South Wales and southern Queensland used mainly for general construction.

New England blackbutt is a large Australian hardwood that grows in the tablelands and coastal ranges of northern New South Wales and southern Queensland.

Also known as New England ash, it is similar in appearance yet not quite as durable as blackbutt.

The heartwood is pale brown, while the sapwood is much paler in appearance. New England blackbutt has an even texture and generally straight grain. Gum veins are usually present.

New England blackbutt can be stained, painted or polished but there can be issues with painting because of its tendency to surface check. The high extractives of mature wood can cause problems with some adhesives. These extractives can also cause staining on painted surfaces exposed to the weather. Blackbutt machines well but is only fair for steam bending.

A durable hardwood, New England blackbutt is used for general construction applications, flooring and joinery.

Shrinkage

Very Low Low Medium High Very High
Tangential 11.40%
Radial 6.10%
Unit Movement Tangential 0.36%
Unit Movement Radial  0.25%

Strength Group

Very High High Reasonably High Medium High Medium Reasonably Low Low Very Low
Unseasoned S1 S2 S3 S4 S5 S6 S7
Seasoned SD1 SD2 SD3 SD4 SD5 SD6 SD7 SD8

Stress Grade

Structural No. 1 Structural No. 2 Structural No. 3 Structural No. 4 Structural No. 5
Unseasoned F17 F14 F11 F8 F7
Seasoned F27 F22 F17 F14 F11

Density per Standard

Seasoned 850kg/m3
Unseasoned 1150kg/m3

Joint Group

Very High High Reasonably High Medium Low Very Low
Unseasoned J1 J2 J3 J4 J5 J6
Seasoned JD1 JD2 JD3 JD4 JD5 JD6

Colour

White, yellow, pale straw to light brown Pink to pink brown Light to dark red Brown, chocolate, mottled or streaky

Mechanical Properties

Modulus of Rupture – Unseasoned 81
Modulus of Rupture – Seasoned 140
Modulus of Elasticity – Unseasoned 12
Modulus of Elasticity – Seasoned 14
Maximum Crushing Strength – Unseasoned 44
Maximum Crushing Strength – Seasoned 65
Impact – Unseasoned 18.6
Impact – Seasoned 20.4
Toughness – Unseasoned Medium – 15 – 24 Nm
Toughness – Seasoned Medium – 15 – 24 Nm
Hardness – Unseasoned 6.6
Hardness – Seasoned 9.2

Durability

Low Moderate Reasonably High High
(0 – 5 yrs) (5 – 15 yrs) (15 – 25 yrs) (more than 25 yrs)
In-Ground
(0 – 7 yrs) (7 – 15 yrs) (15 – 40 yrs) (more than 40 yrs)
Above Ground
(0 – 20 yrs, usually < 5) (21 – 40 yrs) (41 – 64 yrs) (more than 60 yrs)
Marine Borer Resistance
Lyctid Borer Susceptibilitiy Susceptible
Lyctid Borer Susceptibility – Other
Termite Resistance Resistant

Fire Properties

0 1 2 3 4 5 6 7 8 9 10
EFH Spread-of-Flame Index .
EFH Spread-of-Flame Index .
Critical Radiance Flux – Lower > 2.2 and < 4.5
Critical Radiance Flux – Higher ≥ 4.5
Smoke Development Rate < 750
1 – non-combustible 2 – reasonably non-combustible 3 – slightly combustible 4 – combustible
Fire Properties Group Number .
Average Specific Extinction Area < 250
Bushfire Resistance BAL 12.5 and 19 – All AS3959 required applications
Botanical Name Eucalyptus andrewsii
Preferred Common Name New England Blackbutt
Species Type Hardwood

Appearance

New England blackbutt has an even texture. The grain is generally straight, making it appealing for interior use applications such as flooring and joinery. The heartwood is pale brown, while the sapwood is much paler in appearance at about 25 – 75 mm wide. Small gum veins are also usually visible.

Common Applications

New England blackbutt is used mainly for general construction applications. In New South Wales and southern Queensland it is very popular for timber framing but is also used for flooring and joinery.

Common Form

Sawn

Workability

Care needs to be taken when drying New England blackbutt as it is prone to slight collapse.

It can be stained, painted or polished but there can be issues with painting because of its tendency to surface check. The high extractives of mature wood can cause problems with some adhesives. These extractives can also cause staining on painted surfaces after exposure to the weather.

New England blackbutt machines well but is only fair for steam bending.

Origin of Timber

NSW

Readily Available

NSW

Availability – Further Information

New England blackbutt grows in the coastal ranges of New South Wales and the tablelands of northern New South Wales and southern Queensland. It is generally readily available in these areas. Suppliers can provide information on availability in other parts of Australia.

Availability – Further Information

Native Forest

Joinery

Timber joinery products offer a classic, unique and stylish touch to any interior or exterior design. The products are produced for a variety of internal applications including door and window frames, cabinetry, skirtings, mouldings and architraves. When looking to the outdoors, joinery products range from decorative eaves and posts to eye-catching railings.

Many timber species are suitable for joinery products and care should be taken in selecting the perfect timber for the particular product and its intended finish. Rare and exotic species such as Teak and Rosewood can generate pieces of outstanding beauty but material cost and availability are also important considerations.

Commercially available species like Tasmanian oak, Australian cypress, spotted gum and the like, often make the more practical choice, with the added benefit that they can be easily matched with other timber products within the building, like flooring.

Solid timber for joinery products is generally supplied as ‘clear finish grade’ but ‘paint grade’ options are available and these are usually comprised of a composite material like MDF or glulam.

A large number of specialist suppliers and producers offer the consumer extensive choice of profiles for all of the most common and popular joinery products. Choice is in many cases, limited only by imagination.

Cabinetry is often associated with joinery and most typically includes, cupboards, benches and other similar ‘built in’ furniture. Like joinery, cabinetry is generally specified as either paint or clear finish grade and naturally for clear finish grade timbers, appearance and surface finish are critical in achieving a successful application.

Framing

Lightweight timber construction typically comprises framed and braced structures to which one or more types of cladding are applied. Framing configurations can range from the closely spaced light timbers commonly seen in stud frame construction to large, more widely spaced timbers. A timber framed building can be placed on a concrete slab or on posts/poles or bearers resting on piers/stumps supported on pad footings.

Used in houses or multi-residential dwellings, lightweight timber construction offers the flexibility of a wide range of cost effective design options.

When the timber comes from sustainable sources, this construction method can be environmentally advantageous as it combines timber’s low embodied energy with its capacity to store carbon.

Flooring

Whether for structural or finished flooring applications, timber offers durability, versatility and adaptability. The warmth, strength and natural beauty of timber flooring has proved enduringly popular in a wide variety of interior settings.

Timber flooring is a timeless product, offering a warmth and natural beauty largely unmatched by other flooring options. This article provides an overview of the installation of solid timber strip flooring over bearers and joists, timber based sheet flooring products and concrete slabs. Timber flooring is typically supplied as either solid timber or laminated wood products, made from layers of bonded timber. It fits together with a tongue and groove joint and once in place, is sanded and finished. There is a wide variety of species to select flooring from and the right species for a given application will be dependent on numerous factors. Information relating to species selection, environmental assessment, finish selection and recommended maintenance routines are all provided in this section.