hyJOIST®

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.

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.

• Nangwarry Production
• Marsden Point Production

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.

1. Stack on level bearers to keep flat and straight.
2. Stack well clear of the ground for good ventilation.
3. 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.

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.