Benefits

Consisting of structural LVL flanges and a structural plywood web connected using a Type A waterproof bond, hyJOIST is strong, light and easy to install.

Straight, uniform & dimensionally stable in a lightweight form
Greater design flexibility for an economical floor joist layout
- Available in 10 section depths
- 3 different flange widths
- Long lengths up to 13.2 metres
Easier installation of services within the floor space
Easier to install compared to hardwood and steel alternatives
Sourced from environmentally sustainable plantation pine
Stringent quality control - EPWAA certified

Suitable Applications include

Floor joists for houses and commercial floors
Roof rafters & purlins for houses and commercial systems (suited to low pitch applications)

HYJOIST DISTRIBUTORS

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FREE TIMBER DESIGN SOFTWARE

Peace of Mind against terminates - hyJOIST H2-S Terminator

hyJOIST is also available treated (H2-S) for protection against termites and other insects in above ground, weather protected applications in areas south of the Tropic of Capricorn. It gives all the benefits of structural LVL with added termite deterrent qualities.

Backed by a 25-year fully transferable guarantee from the chemical manufacturers

Each beam is treated to the core during manufacture.
Clearly marked with H2-S for ease of identification
Backed by a 25-year fully transferable guarantee from the chemical manufacturers

Field & Product Support

hyJOIST is supported in the field by an experienced engineering support group able to assist with enquiries ranging from design to installation advice.

PHONE - 1800 808 131

Local TECHNICAL MANAGERS

Click here to locate your local technical manager

Range	Depth (mm)	Pieces per packs
		Flange Width (mm)
		45	63	90
HJ200 45	200	41
HJ240 45	240	41
HJ240 63	240		31
HJ240 90	240			21
HJ300 45	300	41
HJ300 63	300		31
HJ300 90	300			21
HJ360 63	360		31
HJ360 90	360			21
HJ400 90	400			21

Legend Treatment
	H2- S Treatment
	H2-S treated or untreated

More options for more economical floor joist layouts

Select the economy section (HJ240 45, HJ300 45 & HJ360 63) of appropriate depth to accommodate the spans of the main area of the floor. Cater for any larger spans in the floor area using the wider flange options of corresponding depth.

Quick Links

Description and Applications
Certification and Compliance
- Technical Literature
Handling and Installation

Technical enquiries

Expert technical support is only a phone call away. Carter Holt Harvey provides expert technical support through an in-house network of engineers and technical managers. This free service is available by simply calling 1800 808 131.

Description and Applications

hyJOIST is an engineered I-Joist manufactured using structural LVL flanges and a plywood web connected using a Type A waterproof bond.

Applications

hyJOIST is suitable for structural applications including residential and commercial floor and roof rafter systems, and industrial purlins. hyJOIST is not intended to support brickwork or other heavy masonry products.

Treatment for Durability

hyJOIST H2-S Terminator is available in all sizes and is part of the Carter Holt Harvey Terminator range. hyJOIST H2-S Terminator is treated against termites south of the Tropic of Capricorn. The treatment is applied to the glueline during manufacture to achieve full termite protection to the core of the beam. No further sealing is required on cut ends or holes.

Moisture content

hyJOIST, at time of despatch from the manufacturing site has a moisture content of between 8-15%.

Structural grading

The properties of hyJOIST have been determined by testing as required by AS/NZS 4357, and are not substitutable for F grades, MGP grade, or other proprietary I-joists. Design verification using the Carter Holt Harvey free designIT software or selection guide (located in the hyJOIST design guide) is required to ensure suitability.

Certification & Compliance

hyJOIST flanges are manufactured in accordance with AS/NZS 4357, and the plywood web is manufactured in accordance with AS/NZS 2269. hyJOIST is product certified by the Engineered Wood Products Association of Australasia (EWPAA), which is JAS-ANZ certified. Participation and compliance with this process based quality control scheme ensures ‘Evidence of Suitability’ in accordance with Clause 1.2.2 of the Building Code of Australia (BCA).

Formaldehyde Emissions

All hyJOIST is manufactured using an 'A' Bond with less than 0.3mg/l Formaldehyde (equivalent to Super E0) emissions from the final product.

Technical Literature

See the brochure tab for all available literature related to hyJOIST.

Handling and Installation

Storage

The following recommendations regarding storage are made in order to ensure that the full benefits of hyJOIST as a dry, straight and true material are available at the time of installation.

Stack on level bearers to keep flat and straight.
Stack well clear of the ground for good ventilation.
Store under cover to keep dry prior to installation.

Note: After installation, exposure to sun and rain for normal periods of construction is not a cause for concern.

General Installation

hyJOIST should be installed strictly in accordance with the details supplied in the hyJOIST Installation Guide.

Technical Note: Rimboard

Carter Holt Harvey sometimes receive requests to assist specifiers with technical advice on other generic products when used in conjunction with hySPAN LVL and hyJOIST Engineered I-Joists. The following Technical Note entitled 'Rimboard' is an example of this - Download.

Racking Through Floors

Modern house designs often feature large open plan living areas with large windows or doors to 'bring the outdoors inside'. In two storey houses this normally means deep section engineered floor joists capable of spanning over lower level open areas.
More information is contained in the hyJOIST design guide and hyJOIST installation guide

Racking Through Floors - Detail

hyJOIST Cantilevers

hyJOIST floor joists are capable of meeting the loading requirements for cantilevers as defined in AS/NZS 1170. For external use, hyJOIST floor joists must be protected from becoming wet by a fully waterproof deck. In the case of non-waterproofed decks the use of outriggers of suitable natural durability or preservative treated to H3 as per AS/NZS 1604 is suggested. Outriggers can also provide a step down to the deck reducing the likelihood of water ingress at openings.
More information is contained in the hyJOIST design guide and hyJOIST installation guide.

Health & Safety

The MSDS available from the website details all health and safety precautions required when using hyJOIST

Environmental certification

hyJOIST is manufactured from 100% renewable plantation timber. All timber is sourced from Australian Forestry Standard and/or FSC certified forests.

Technical Publications

hyJOIST: Introduction

6 pages
Format: PDF
FileSize: 1.2MB
Download File>

hyJOIST 'Options Range Design Guide'

12 pages
Format: PDF
FileSize: 509K
Download File>

hyJOIST 'Options Range - Guide for installation'

16 pages
Format: PDF
FileSize: 767K
Download File>

hySPAN: Use in weather exposed applications

2 page
Format: PDF
FileSize: 208K
Download File>

MSDS

	Hyjoist H2-S Terminator Material Safety Data Sheet (MSDS)
	Format: PDF Filesize: 1KB Download file >>

	Hyjoist Material Safety Data Sheet (MSDS)
	Format: PDF Filesize: 1KB Download file >>

Carter Holt Harvey is committed to on-going reviews of its MSDS's to ensure they reflect all currently available information. In the event that you require more detail on any MSDS or would like to confirm that you have the most recent MSDS for a particular product, please contact the Marketing Department via phoning 132 321.

The cool new face of coastal homes

West Coast architect Greg Jones is again putting a surprising spin on Victorian seaside architecture. This time, the Blakey Residence not only has a stunning ocean aspect, but is also wearing the latest in summer eyewear - a pair of Oakley sunglasses. Greg Jones describes the fun he had creating this effect with engineered building products by futurebuild and plywood cladding by Woodlogic.

The site for the Blakey Residence was relatively flat and though it had views of the surrounding landscape, at Indented Head near St Leonards on Port Phillip Bay, the site itself had nothing special to commend it. In this case the focus of Jones’ design was creating ‘character’ and interest without jarring with the landscape. The solution? With a view of the bay in two directions, the aim was to maximise these views and so Jones suggested to the client that the house wear a huge pair of ‘sunnies’ that the occupants look through to the broad vista across the landscape and to the distant sea.

“I suggested to the client a level of fun,” said Jones, “and so, to design the house as if it had sunglasses on, literally. The house has two pavilions joined together – as the client is considering setting up a B&B – this divides the business and private spaces. Each pavilion is rotated to have different outlooks and the windows of the ?rst floor have wrap around Oakleys on. We were able to do that, having timber windows.”

To create the effect of the sunglasses, the façade has three layers – a forehead, cheek and chin reference, each layered over the other. The main bracing diaphragm for the walls and around the windows is Shadowclad and Texture 2000. The different textures of the cladding materials provide a layering effect for the building and allowed for ease of cutting to create the different shapes required around the windows. Shadowclad was used for the ‘hairline’ to give some textural differentiation from the lower levels that used Texture 2000.

The façade was painted purple for the hair, a mid-french grey for the cheek and off-white for the chin. The colour further expresses the layers of the face.

Futurebuild engineered building products were used in the structure of the house. hyBEAM Engineered I-Beams normally associated with floor framing were used as purlins in the roof. The curved structure was formed by single spanning the hyBEAMs across the building. (Connection details for this type of construction can be found in the new designIT software from futurebuild.) The upper floor similarly used single spanning members across the 4.8 metres of open spaces below. The lower floor utilised Hyspan LVL supported on external and one internal bearer.

The use of timber products in subfloor applications is covered in the Building Code of Australia (BCA). The BCA divides Australia into three climatic zones and provides advice on clearance from the ground and ventilation for each of these zones.

The light structure of the floor and roof beams, assist the structure to hover over the landscape. In this case the floor levels had to be elevated to get the view, and will be landscaped to shape it back into the site.

It was Jones himself who chose the Hyspan and hyBEAM for the job, as he has used the products before and is currently using them in his own house, which is in progress. “They are light, straight and easy to handle and cost competitive against solid timber and other engineered products. And because of the extra depth that they allow, there is also more air space for insulation. Minimum depth roofs are always less effective for insulation.”

In context, the house is part of a sub-division of well-placed blocks. There is actually little competition or other stylistic influence from other buildings. However, the coastal area is moving ahead with many new developments showing innovative flair and sharing in Jones’ pursuit of ideas. Though, one would imagine that a ‘face with shades’ looking out to sea might be an idea that is hard to go head to head with.

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