RED BLOODWOOD

RED BLOODWOOD
RED BLOODWOOD2018-05-08T23:26:29+00:00

Project Description

WOOF Timber - Red Bloodwood

Red Bloodwood

Other Names

Bloodwood, Pale Bloodwood, Pink Bloodwood, Pale Kulcha Bloodwood, Small-flowered Bloodwood, Eucalyptus gummifera, Eucalyptus corymbosa, Corymbia intermedia, Eucalyptus intermedia, Corymbia polycarpa, Eucalyptus polycarpa

Red bloodwood is a medium-sized Australian hardwood occurring along the coast of New South Wales and Queensland. It is commonly used in the production of round timber.

Red bloodwood is a medium-sized Australian hardwood that grows along the coastal areas of New South Wales and Queensland.

Taking its common name from the appearance of its heartwood, red bloodwood ranges from a dark pink to dark red colour, with much paler sapwood. It has a course texture, with the grain usually interlocked.

Due to the presence of concentric gum veins, red bloodwood is not ideally suited for use as sawn timber as gum veins – or the red-coloured kino veins – can open up during drying. This species is mainly used for round timber applications such as poles, piles and posts, however due to its attractive grain pattern, red bloodwood is also used for veneers and decorative paneling.

Red bloodwood can be painted, stained and polished. It glues satisfactorily, but any surface preparation or machining should be done so immediately prior.

A highly durable and dense species, red bloodwood is well suited for in-ground applications such as posts, although untreated sapwood is susceptible to lyctid attack.

Red bloodwood is generally readily available, especially close to the areas it grows.

Shrinkage

Very Low Low Medium High Very High
Tangential  3.30%
Radial  2.50%
Unit Movement Tangential  0.33%
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 1005kg/m3
Unseasoned 1140kg/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 114
Modulus of Rupture – Seasoned 122
Modulus of Elasticity – Unseasoned
Modulus of Elasticity – Seasoned 22
Maximum Crushing Strength – Unseasoned 56
Maximum Crushing Strength – Seasoned 79
Impact – Unseasoned
Impact – Seasoned
Toughness – Unseasoned Medium – 15 – 24 Nm
Toughness – Seasoned Medium – 15 – 24 Nm
Hardness – Unseasoned 8.6
Hardness – Seasoned 9.4

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 Corymbia gummifera
Preferred Common Name Red Bloodwood
Species Type Hardwood

Appearance

Red bloodwood ranges from a dark pink to dark red colour, with a much paler sapwood. It has a course texture, with the grain of red bloodwood usually interlocked.

Concentric gum veins, or kino veins, feature prominently and make this an attractive feature for decorative veneers and paneling.

Common Applications

While the presence of concentric gum veins is an attractive feature for decorative veneers and paneling, this also limits the other applications of red bloodwood to round timber. Poles, piles and posts are the most common and red bloodwood’s high durability makes it well suited for in-ground applications. Red bloodwood can also be used for sleepers, fencing and house stumps.

Common Form

Sawn

Workability

Red bloodwood can be painted, stained and polished. It glues satisfactorily, but any surface preparation or machining should be done so immediately prior.

The presence of concentric gum veins means red bloodwood is rarely used in sawn timber form – mainly round timber and decorative veneers or paneling.

Red bloodwood can be seasoned satisfactorily, however there is a tendency for the gum veins to open up during the drying process.

Origin of Timber

NSW

Readily Available

NSW

Availability – Further Information

Red bloodwood is generally readily available, most commonly near the areas it grows, being the coastal districts of New South Wales and Queensland.

Native Forest.

Fencing

The inherent appeal and strength of timber makes it the obvious choice for fencing. Timber fencing not only provides a natural look in keeping with the outdoor environment but it also enables the construction of a long lasting, durable property boundary. Fences come in many forms including the traditional paling, picket, post and railing styles. Most rely on a structural frame of posts embedded into the ground and two or more rails spanning between the posts. The ultimate selection of a suitable fence type or style is determined by application and aesthetics. A fence can serve a variety of purposes, including the provision of security, privacy and safety in addition to defining property boundaries. Specification for durability is important, especially for posts, given their exposure to high moisture in the ground.

This section provides an overview to best practice methods in specifying, installing and finishing a timber fence.

Structural Timber Poles

Timber pole construction is typically utilised to provide support for gravity loads and resistance against lateral forces. The natural appeal of timber ensures that its role is not purely structural however, with timber poles complimenting architectural designs aimed at harmonisation with the natural environment. The small number of footings required in pole frame construction also ensures minimal disturbances to the site.

With a double bearer system, poles can be spaced further apart than is usual, creating a more spacious building interior, that allows greater interior design flexibility. While poles are usually placed in a grid like system this is not compulsory and the flexibility of the application means the system can cope with a wide variety of designs, enabling designers to take full advantage of beautiful outlooks.

This article provides a comprehensive overview of the process involved in specifying, designing and constructing a solid timber pole construction.