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hyJOIST®

hyJOIST® Engineered I-Joists are cost effective, lightweight I-Joists used in residential and commercial construction.

  hyJOIST

 

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

Click here for hyJOIST distributors


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

hyJOIST Range

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.

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.

 

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.

platform_bluehouse_upperfloor

Mexican miracle comes to Perth hillside

What does the miraculous apparition of Mary, on a hill north west of Mexico City, have to do with a contemporary development of colourful, luxury units in Perth? Builder Ben Pitt describes a new project overlooking Scarborough Beach that the owner has called ‘Guadalupe Hill’ and one which the locals are watching with interest.

In 1531 a lady from heaven appeared to a poor Indian on a hill near Mexico City. She identified herself as Mary, Mother of Christ and instructed him to have the bishop build a temple on the site. This was ‘Our Lady of Guadalupe’ and an incredible array of miracles and cures have been attributed to her. Ten million still visit her shrine on the hill annually, making her Mexico City home the most popular Marian shrine in the world, and the most visited Catholic Church in the world next to the Vatican.

The Lady’s fame is why the new Catholic owner of what used to be one of Perth’s most well-known and iconic sites, is building a brand new development with a Mexican theme. The five residential units being built on a somewhat infamous local hill on which the ‘Blue House’ used to stand, will now display a huge picture of Mother Mary on the side of one building, visible when heading North. Our Lady of Guadalupe will be spot lit each night for all to see.

The site was originally the location of Blue House, one of the most famous buildings on Perth’s nearby coast. The house was known by everyone because of its prominent position overlooking Scarborough Beach. A Malaysian prince purchased the site but when the plans he had for the site were not approved he sold to the current owner.

Ben Pitt, supervisor on this particular project for Bill Pitt & Sons, a Perth based construction business, explains that the units will have an overall Mexican theme in addition to Our Lady. According to Ben this made the project quite unusual. The building also needed to be constructed to withstand the harsh conditions that come with the commanding ocean views.

The residential units are to be fully furnished and short term leased to the upper end of the market. The units are designed to grab attention (aside from their sacred imagery) and each has a brightly coloured tower, interesting fixtures and unusual materials such as the imported Indian stone tiles used throughout.

Given the site conditions and the complexities of some materials (gluing the Indian tiles was a problem), the builder needed to find innovative savings in other areas to remain within the client’s budget. Traditionally the Perth market uses suspended concrete slab construction for upper floors, which involves several trades and propping systems during construction. Ben Pitt, a carpenter by trade, opted for the more economical timber floor system which his team could install themselves.

Ben who had used Hyspan before, was shown how Hybeam H2 provided the most economical solution for these floors. Once Ben was introduced to Hybeam H2 and began to work with it on-site, the I-Joists impressed him in many ways:

“Originally the floor was designed as concrete with cherry wood flooring on top but we changed to Hybeam H2. We put solid jarrah on top of the joists. This was approximately a 15% cost saving doing it this way. It is structurally just as sound and I prefer to walk on timber floors as opposed to solid concrete. Most people find it more comfortable to walk around on.”

The weight of the joists and the large spans also helped to make construction of the unit’s upper floors simpler. “The joists could span from one external wall to the other with one span,” says Ben, “whereas if we had used solid timber 190 x 45 joists, we would need to support them in the middle. You can cut them easily in certain places to run services through and you can’t do that to the same extent with other timbers.”

Hyspan H2 was used to trim the stairwells. The solid Hyspan H2 was used to support the ends of the joists that terminated at the stair well. Ben says he uses Hyspan H2 all the time in the units, schools and churches that he and Bill Pitt & Sons erect all over Perth’s South West suburbs.

He also points out that because Hybeam H2 and Hyspan H2 are now treated for white ants* this made the timber even more price competitive. Other treated pine not only loses on span, but is also more expensive.

All in all, the apparition on Perth’s famous hill, now ‘Guadalupe Hill’, is ready for the luxury rental market. The lightweight timber materials meant the project progressed quickly and the entire project came in at around $2 million for construction, which the client no doubt thought was a small miracle in itself.

*Hybeam H2 and Hyspan H2 are safely treated with DeterMite to provide termite resistance to hazard Level 2 for areas of Australia south of the Tropic of Capricorn.

 
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