New Glazing Product: Low E Coated Glass Launch

Solarplus TLE 62 new glass product

G.James Glass and Aluminium pride ourselves on being at the forefront of the latest product developments and are proud to offer a new range of high performance Low E coated glass products, Solarplus TLE62. This new range of coated glass will be incorporated into G.James TwinGlaze Insulated glass Units and will supersede the current range of Solarplus Low E products offered.

Benefits

Low E glass has a range of distinct benefits – the major function is to provides better thermal performance. The new Solarplus TLE 62 glass produces results in an efficient method, requires shorter lead times for production, and is ideal for jobs large or small.

Solarplus TLE 62 has high visible light transmittance and neutral appearance in both transmittance and reflectance which is low internally and externally.  Please refer to the performance table below for data, and please note, this is for glass only performance. Contact G.James for whole of window data.

Solarplus TLE 62 new glass product

The thermal performance is excellent with low U Values and Solar Heat Gain figures.

Colour Options

The Low E coating is on clear glass and can be combined with tinted glass to provide different aesthetic qualities. The range includes:

  • Grey
  • Green
  • Bronze
  • Blue
  • Super Green

The Solarplus TLE 62 is a durable coating that is able to be heat treated for toughening where it is required.

The G.James manufacturing facilities are currently being upgraded, and this product will be available in October, 2013. Please contact us with any further enquiries about this new product range.

Gasworks – A Modern Development with a Heritage Heart

Gasworks building developmentOngoing development of a historical site located at Newstead (Brisbane), sees it transforming in stages to a new mixed use precinct. The name derives from the sites original use – the gasworks, and part of the project is to protect the heritage listed gasometer located prominently amid the gasworks buildings.

Originally built in 1863, the gasometer once stored gas in a large bladder contained within its frame work.  The Gasometer has been fully restored ensuring the ornate pinnacles and lace work beams stand as equal alongside its newly constructed neighbours.  It creates a unique contrast set amidst the strong lines and bold shapes of the modern architectural features of the Gasworks building development.

Designed by the same team that worked on the adjacent Energex building – Architect Cox Rayner and builders FKP, the buildings in this phase of construction comprise of Building A on Skyring Terrace (five storeys) and Building E on Longland St (three storeys).

G.James Role

G.James Glass and Aluminium supplied and installed glazing facades, doors, windows and some extruded sun hoods. Building A has a proposed 5 star green star rating – so energy efficiency, acoustics and air infiltration were important design factors. As such, products with proven test results were selected for use.

Building A

Building A comprises ground floor shop front retail with four upper levels of offices. The offices utilise the flush glazed 651 series glazed with IGUs made up of green glass with a low E coating for energy efficiency, a 12mm air space, and 6mm clear glass internally. This also assisted in achieving a better acoustic rating.  Spandrel panels were made with a green ceramic painted surface – a premium spandrel glass option  that maintains the look set by the vision area.

Building E

Building E was a combination of two levels of residential apartments along Longland Street, two levels of office space along the breeze way between the buildings, and a retail shop front precinct on the ground level. The offices in building E utilize the 650 series, also flush glazed, but to accommodate 11.52mm laminated glass. The glass has a low E coating and the same colour, but didn’t require the same level of acoustic rating or energy efficiency. The office glazing also incorporated architectural features such as glass fins for extra strength and sun hoods for protection.

The residential apartments use a range of glazing styles. Fixed framing used the 650 series system with 265  series awning windows spaced across the facade. Balconies feature four side supported 550 series balustrades with access through 445 series sliding doors.

Shopfront Design Problem

The retail areas required a centrally glazed pocket, but the opening size and wind loads exceeded the constraints of the current system.  As many architects are looking for options to make windows larger, the decision was made to replace the current aluminium vertical members, the mullions, with a stiffer option. The new design also incorporated the ability to strengthen it further. This new addition to the G.James range is used extensively throughout the Gasworks project.

Practically Completed

Practical completion was achieved on the 3rd August, 2013, however there are still minor works, interior fit outs and landscape work under way.  Building E has been designed so a residential tower can be constructed above it in the future.

The Gasworks project is an aesthetic feast, and well worth a look if you are in the area. Please consult the interactive map project to get the location and a summary of the project information.

IGUs. A sound acoustic solution?

sound and noise acoustic control with IGUsInsulating Glass Units (IGUs) or double glazing, have been a popular solution to control noise, but they aren’t the only, or even the best solution in many cases. The aim of this article is to explain how acoustic problems are identified, assessed and provide solutions to properly address them.

Acoustics

The acoustic performance of façades is becoming more important in building design, and not surprisingly is included as part of the Green Star rating process. Although it is a small part, it’s raising the profile of sound reduction and the need to find better solutions to the increasingly worsening noise problems in today’s society.

To better understand how to mitigate sound, it is beneficial to have an awareness of a few key ideas; how sound is transferred, the way different noises are measured, know about the principles to minimise the variety of sources and coordinating appropriate solutions. Prior knowledge makes finding a solution a lot quicker and easier when you are consulting a professional.  Using advice to compare test results, it is imperative to know the difference between glass only and window system results if you want sound acoustic solutions.

Determining sound factors

Noise sources in the vicinity of a project need to be identified to best determine the most efficient glazing solutions. Look for risk sources, some examples of which are below;

  • Traffic noise from vehicles – cars and/or trucks
  • Trains
  • Planes and flight paths
  • Trams
  • Boats
  • Entertainment venues
  • Industry – a warehouse, factory plant, a truck depot up the road

For each source, be aware of the proximity and direction it will be coming from.  Future changes that will affect sound transfer must also be considered – empty or older blocks that will be used for building development, planned roads and motorways to be constructed, or a feature that may be removed to expose the project to heightened noise distribution. This information will be assessed by an acoustic engineer or glazing contractor looking at the requirements of the project.

The two main properties that contribute to disturbance from noise are the frequency and intensity level at various frequencies, or volume. Both influence the selection of appropriate glazing systems for a project.

Frequency

Sound travels as sound waves (variations in pressure) that have different frequencies. When the sound wave hits an object, this will be absorbed, transferred or reflected dependant on the properties of the object and the frequency of the sound. Below is a table that describes the frequencies associated with different noises;

Frequency distribution

Volume

The inherent volume or loudness of noise is measured in decibels (dB). Following is a table that gives you an idea of how loud different noises are;

comparison of sound

 Acoustic fact:

The human ear cannot distinguish a change in noise level of 3dB or less.

Different types of glass will assist deadening the various frequency and sound levels. To decide what the best solutions are, the window systems need to be comparable.

Measuring how much a glazing system suppresses noise

The current standard unit that is used to nominate the amount of acoustic insulation achievable is the Rw. An Rw rating is applied to many products to compare its capability to reduce sound against similar products. However, the nature of glazing systems means that frequency plays a large part in the transference of sound. So correction factors are applied to the Rw and expressed as Rw(C, Ctr).

Using Rw Data results:

When looking at results, ensure you understand what the Rw rating applies to.  Glass only data will give you just that – a figure for the glass.  It will not be comparable with a whole of system framing. Glass only data has a higher figure, and misrepresents the effectiveness of the desired glazing solution.

Rw

The Rw, or weighted sound reduction index, is a material or system’s ability to reduce sound transferring through to the other side, of a window or wall. As a rough guide, an increase of 1Rw reduces the sound perceived on the other side by about 1dB.

Rw(C, Ctr)

The correction factor for the Rw takes frequency into account. Medium to high frequency noise like conversation, and faster traffic (travelling more than 80kmh) are nominated as the C number. Low to medium frequency sound like urban traffic and planes flying overhead are the Ctr figure.
If a project has a requirement of Rw = 32(-1,-4), then the Rw = 32, the Rw+C = 31 and the Rw+Ctr = 28. The noise frequency distribution determines the correction factor figure to be used. If the predominant noise source affecting a project is traffic noise, being a low frequency problem, the Rw+Ctr figure is used. In this case, the figure to achieve is 28. If a window system is rated at Rw30(-2,-2), the Rw+Ctr = 28, therefore achieving the above requirement. The Rw number should always be used with correction factors.

Testing the Acoustic Performance of Glazing Systems

Testing is done by accredited organisations in an acoustic laboratory. The testing space consists of two rooms of known acoustic properties separated by a wall with a high sound insulation. The rooms are constructed of thick block work with the entire laboratory sitting on airbags to isolate it from ground vibration. An opening is made in the wall for the glazing system. One of the rooms is set up as a source room, and one is the receiving room. The difference in noise level measured between the rooms is used to calculate Rw, C and Ctr figures that are attributed to the system tested.

Acoustic Solutions

There are several acoustic principles that are applied to the design of glazing systems to obtain the best performance to guide you in choosing the optimal glazing products.

Glazing design

Keeping sound out is like keeping water out – any gaps provide a path by which the acoustic efficiency of a system is reduced. Even the smallest crevice or notch out of a system makes a difference. Glazing systems can be riddled with gaps – good systems minimise these as much as possible. Testing is the only way to know how any system will perform.

Product selection

Restricting sound penetration is only as good as the barrier’s weakest point. Opening or operable parts of a façade are the hardest places to control sound, but improvements in technology are minimising the issue. With changes in door design to allow for access according to AS 1428, it is good to be aware these points are made weaker, acoustically.  With glazing developments, there are solutions to help minimise this issue.

Window systems with a positive closing force are more effective at blocking out sound. Awning windows and hinged doors generally perform better than sliding windows and doors.

Acoustic seals can be used to improve glazing performance and achieve a better Rw rating. The only way this can be accurately assessed and used for compliance, is if the glazing system is tested with the acoustic seals.

An air gap between the glass panels in a glazing system can provide a degree of sound reduction dependant on the size of the air gap. Typical IGUs with an 8, 10 or 12mm air gap, the improvement is marginal. Larger double glazed air gaps are much more effective, with 50mm being the “sweet spot” with only marginal improvement beyond this. These large air gap systems are generally the best performing of any glazing system.  Jockey sash systems can also be used to create large air gaps but have size restrictions and may cause internal condensation issues.

Laminated glass can provide equivalent or better performance than a standard air gap IGU. Typically the thicker the laminate, the better the acoustic performance. Specifically designed acoustic interlayers are now available that provide an increase in performance in standard interlayers

Looking for assistance with acoustic design

Window fabricators can help you understand the acoustic performance that their products provide. If you are aware of the nature of noise pollution in the vicinity of your project, then it’s a matter of matching the correct products to minimise this problem. Look for new technology becoming available to better deal with the increasing noise issues in today’s society.

When using window acoustic data, ensure you are discussing whole of window system data. There is a lot of glass only data available, but it’s the frame that is typically the weakest acoustic point of a glazing system. The glass only data will not give you a proper representation of noise control.

5 Points to Remember

  1. Understanding Rw(C,Ctr).
  2. Gaps in Systems = sound transfer. Minimise these weak points, especially in operable glazing.
  3. Larger air gaps in between glazing layers helps acoustically.
  4. Familiarity with latest technology in sound reducing products like acoustic seals and interlayers.
  5. Test results need to be comparable. Look at whole glazing systems, not glass only test results.

Helpful Links

For further information on the subject, please refer to the suggested following resources:

Thermal stress glass breakage

AGGAThe following fact sheet has been prepared by the Australian Glass and Glazing Association Technical Sub Committee and has been reproduced with the kind permission of the AGGA.

The original technical fact sheet is available as a downloadable PDF file.

Thermal Broken Glass

Introduction

Thermal stress occurs in glass when there is a temperature variance in different parts of the glass. If the stress caused by the temperature difference is greater than the strength of the glass, thermal stress glass breakage will result.
Thermal stress glass breakage is not a new phenomenon and it has been relatively well understood in commercial glazing for many years. However, given the increasing use of high performance, energy efficient glazing and the fact that some of these products can carry a greater risk of thermal stress, it is important that everyone involved in the glazing industry has a better understanding of thermal stress, its cause and how to prevent it.
As thermal stress breakage is not often due to a glass fault, but rather the result of a set of conditions that a pane of glass is exposed to, it is generally not covered by a glass supplier’s warranty.

Identifying thermal stress glass breakage

A glass fracture can be identified as a thermal stress breakage if the start of the crack is at 900 to both the edge of the glass AND the face of the glass. Depending on the magnitude of the stresses involved, the crack may only travel for a few millimetres before branching out or veering off-line, so the 90° angle of the initial fracture may not always be immediately apparent.
Breakages caused by thermal stress can be characterised as either low stress breakages or high stress breakages. Low stress breakage is characterised by a single crack that “lazily” makes its way across the glass, while high stress breakage is identifiable by the initial crack branching off into a number of separate fissures a short distance from its origin.

What causes thermal stress?

As mentioned previously, thermal stress is caused by varying temperatures in different parts of a glass pane. Absorption of the sun’s energy is one of the main causes of this temperature difference. The section of glass exposed to the sun absorbs the sun’s energy and, as a result, heats up. Any part of the glass which is shaded from the sun, for example, by the window frame, stays relatively cool.
The hot glass expands while the smaller, cooler area doesn’t. If the cool area of the glass isn’t strong enough to withstand the forces imposed by the expanding hot section of the glass, thermal stress breakage will occur. Putting the forces required to induce thermal stress into perspective, Pilkington estimate that for every degree in temperature difference between the edge of the glass and the centre of the glass, around 0.62 MPa of stress is introduced into the glass. Given that in some cases temperature differences of 20 to 30°C can occur, that equates to around 12 to 19 MPa. This is higher than the design stress used for wind loading!

Thermal stress risk factors

Given that thermal stress is caused by differences in temperature in a piece of glass and that breakage occurs when the ability of the glass to withstand this stress is exceeded, any situation or factor that increases this temperature difference, or decreases the glass’s strength, increases the risk of the thermal stress breakage.
Factors that can affect the risk of thermal stress include:

Edge Condition

Damage to glass edges during manufacture or installation is arguably the largest cause of low stress thermal breakage.
As US glass manufacturer PPG puts it: “The as-cut quality of glass edges is the single most important factor affecting the edge strength of glass. Poor cut-edges quality can reduce the glass strength by 50% or more…” “Glass edge quality and the resulting glass edge strength is particularly critical to the performance of the glass under the thermal loading …” Glass Edge FeatherThe level of thermal stress that a piece of glass can withstand is directly affected by the condition of the glass edges. The edges that are most resistant to thermal stress breakage are good quality clean-cut edges with no shells, vents or shark teeth. This may be difficult to achieve in laminated glass and edgework may be required to smooth the edges.

Glass Type

Different glass products have a different tolerance to thermal stress. Generally, the more solar energy a glass product absorbs, the higher the risk of thermal stress breakage. All glass manufacturers provide data on the solar energy absorption properties for their products.
Solar absorption can vary greatly, even between similar products. The use of a reflective coating can significantly increase the amount of solar absorption. This is because, in effect, the glass is absorbing the solar energy both on the way into the glass and then again on the way out after it hits the reflective coating.

Example:

Uncoated 6mm grey glass has a solar absorption rate of around 45%, while the addition of a reflective coating to this product increases solar absorption to 63%.
The use of transparent Low E coatings can also increase the solar absorption rate of glass. Low E coatings are designed to reduce the passage of radiant heat flow through the glass to improve energy efficiency. This leads to higher glass temperatures and increases the risk of thermal stress.
Another significant risk factor is the addition of heat absorbing films or any partial covering of a glass pane by other products (such as signs or paint) after installation. Both of these can increase the risk of thermal stress.

Glass Size

The larger a pane of glass, the greater the area of glass that is absorbing the sun’s energy, compared to its relatively narrow cooler edges. The larger area of hot glass results in higher levels of thermal stress in the edges of the glass.

Exterior Shading

Whilst glass properties are well documented and can be taken into account during the design phase of a project, accounting for exterior shading can be more problematic.
The effect that an external shading device has on thermal stress depends on a combination of its size, shape and location on the glass. Exterior shading is further complicated by its seasonal nature; as the sun’s position changes throughout the year so too does the shadows it casts.
In general:

  • Shading that covers 50% or less of the glass is more unfavourable than a device that shades a greater percentage of the glass;
  • Static shading is more unfavourable than mobile shading;
  • V or L shaped shading induces higher thermal stress, particularly if the point of the V falls on an edge of the glass.

Interior Shading

A thermal stress risk factor that is encountered more often in residential construction than commercial, is the use of curtains and blinds on the inside of a window. The impact that blinds and curtains have on thermal stress depends on the colour, type and other factors, however the effect can be significant.
While close fitting blinds or curtains help to minimise heat transmission into or out of the building, they can significantly add to the risk of thermal stress. To minimise this, the space between the glass and shade must be at least 50mm (preferably 150mm) and should be vented. Ventilation is provided by leaving a gap between the blinds and the walls, or frame, of 50mm at the head and 25mm at the sill.
The effect that blinds and curtains have on thermal stress is also dependent upon how much energy they reflect back onto the glass. Light colours are good reflectors while dark colours are not. Closed weave fabric helps trap heat more effectively while open weave lets the heat pass through. Venetian blinds are excellent heat reflectors as are metallised blinds.

Heating & Cooling

Artificial heating and/or cooling devices should be positioned so that they do not blow hot or cool air directly onto the glass surface, nor into the space between the glass and the curtains. Doing so may result in varying temperatures on the glass surface and therefore increase the risk of thermal stress.

Glazing Method

Commonly used glazing methods do not significantly affect the risk of thermal stress. The exception to this is structural glazing, which reduces the levels of thermal stress by reducing the temperature difference between the glazed edge and the centre of the glass. Care should be taken when using any glazing method that either encourages the transfer of heat away from the glass or covers unusually large amounts of the edges of the glass.

Managing the risk of thermal stress

The risk of thermal stress breakage can be eliminated by managing the factors outlined above or by heat strengthening the glass.
Heat strengthening increases the strength of the glass, which allows it to resist the thermally induced stress. Heat strengthening can be relatively expensive, particularly if required for laminated glass, so unless replacing glass, which has been broken under thermal, stress, a method of quantifying the risk level is needed.
Many glass manufacturers’ websites provide detailed information on thermal stress breakage. Some also provide online tools that enable you to perform a thermal stress analysis yourself, or they will perform a thermal stress analysis for you providing you purchase glass from them.
By using available information, the glass installer can objectively assess the risks prior to installation. In some cases redesign may be possible, eliminating the need for heat strengthening and therefore saving unnecessary expense.

Interactive Map: Building Brisbane

Brisbane construction projects by G.James Glass & Aluminium

Brisbane, being the location of our Head Office, sees many fine examples of G.James workmanship.   Here, we outline some of the biggest and best projects undertaken to showcase our capabilities in recent times.

The interactive map is designed so you can take a tour of some of our most recent and notable works.  Either at your desk looking out a CBD window, taking a stroll around town, and driving past a building or through an area you have always wanted to know more about.

Brisbane

G.James has contributed widely to what Brisbane looks like today.   There are buildings that have added to Brisbane’s sky line and to the diversity of looks and uses that are designed for the various parts of this fair city.  On some buildings, there are unique features that make them distinctive.  For example –

  • the ribbons of M&A,
  • the splash of red across the Australian Federal Police building,
  • the glass wall of Sir Samuel Griffith Centre,
  • the towering Aurora and Riparian plaza.

There are many buildings that have achieved the coveted green star energy efficient design,  some interesting artwork on glass designed by local artists – its worth a visit to the Anthropology Museum at UQ to see the ceramic printed window alone. Some of the buildings have specialised glass systems to suit the works being done, like the Translational Research Institute and the ABC headquarters.

There are projects that have altered the face of a tired old façade, so if you look at an old image of QIMR, you won’t recognize it.  And then theres the Suncorp Stadium which gives you a glimpse inside a place where state pride and competition is on the line.

The Interactive Map

The map is aimed to give you a glimpse into the depth the G.James knowledge base and provide an overview of the types of works that G.James is capable of.  It highlights projects done by various departments in the company, including:

  • Commercial departments
  • Residential departments
  • Gossi park and street furniture
  • Glass department

You can have a look at the map and plan out a scenic drive, or target specific jobs, or just get an idea of what we have produced, in your area.  As you can imagine, there are too many jobs to make this an all-inclusive list, but we aimed to include a range of jobs reflecting different styles and features.

A brief dossier on the project is included – a photo of what to look for, basic job data and links to further information on the project.  G.James can help you with any further information required for the jobs represented.

Explore Here…

Enjoy the exploration, and keep an eye on this space. Other areas will be released as our database of projects rolls out – Sydney, Melbourne, the Gold Coast, as well as other areas to be where you can find G.James fingerprints…

Until then, enjoy this insight into the River City.

Key:

 G.James Projects

 Gossi Designs

A printed curtain for the Infiniti Showroom

Nissan's Infiniti Showroom

Nissan’s brand new Inifiniti Showroom at 5 James St, Fortitude Valley, Brisbane, offers a new option of luxury car, provided at the level of traditional European car manufacturers BMW and Mercedes-Benz.  The concept is to mimick the service offered to this level of customer but aiming at a new audience.

To accomplish this, Infiniti’s IREDI (Infiniti Retail Environment Design Initiative) developed a world class facility that will catch the eye of a newly emerging, discerning audience. Utilising Japanese notion of “Omotenashi”, or the heart of hospitality, a high level customer experience was developed from presentation to purchase.  The Brisbane showroom is the largest in Australia to date – the 2000m² complex comprises of a lobby, a lounge and the showroom, framed stylishly in printed glass showroom window.

Designed by the architectural firm, Brisbane based McKerral Architects , the curtain pattern was supplied as part of the global Infiniti corporate image. The original pattern needed to be refined and approved internationally prior to manufacture.  G.James worked in conjunction with the design team to finalise the artwork.

The printed glass produces a privacy shadow screen by day, but at night with lights behind it, the printing disappears. The print work and positioning lend itself to the overall highly polished finish presented to prospective clients.

Project Update: Queensland Institute of Medical Research

QIMR Herston Rd Entrance

Transforming an existing medical research facility in Herston, QLD to align with the surrounding complex.

Queensland Institute of Medical Research Phase 3, or QIMR ph. 3, is the refurbishment of the Bancroft Centre. It is located just outside Brisbane’s CBD next to the Royal Brisbane Women’s Hospital.

The Bancroft Centre, owned by QIMR  is contracted to be built by Watpac. The project is designed by a joint architectural venture between Wilson and Wardle architects.

G.James’ Role

This project initiated as a design and documentation contract, in which G.James were required to advise and recommend the design of glazing works, survey the existing building and detail the information via formal drawings. Due to the positive contributions and coordination of this aspect of the project, G.James were awarded stage 2 – the supply and install of the glazing works.

The Bancroft Centre

The Bancroft Centre is a 14 storey concrete building with feature beams and columns criss crossing the building dividing up the individual windows and balconies spread across the elevations. At ground level, a large lobby window and sub station louvre is also part of the upgrade.

The medical research undertaken at the centre is highly sensitive. In the pursuit of the solutions being investigated, the building will be partially occupied by the client throughout the construction process. This will affect parts or entire floors at different stages. Close coordination of on site works, monitoring clients requirements and ensuring safety for all, dictates progress.

External Refurbish

The basic concrete structure remains, with the southern concrete face being removed and extended out towards Herston Road. The extensions are supported by a grid work of steel with concrete platforms. The face lift is to extend down the western side to the existing balconies and on the eastern side to the recently erected QIMR central building.

The architectural intent is to create a look that reflects the existing Clive Berghofer Cancer Research Centre (CBCRC) located on the other side of the QIMR central building. To do this:

  • The main façade on the curtain wall is being replicated as much as possible.
  • The visible rendered sheer walls are being covered with Alpolic cladding to wrap around to the front of the balconies and underside of the soffits in a similar fashion to the CBCRC building.
  • Glazing in the balconies and lobby were replaced to reflect the more natural colour scheme and full height layout of the CBCRC.
  • Louvres are being modernised and/or introduced to cope with the needs of the buildings updated research capacity, the design of which is in keeping with the other QIMR buildings.

G.James has followed stringent processing and approval of the glazing samples and design to ensure these principles are followed adequately.

Design: Energy and Acoustic Efficiency

Renovations on old buildings require them to be upgraded to meet the latest energy efficient guidelines. To accomplish this, the Bancroft refurbishment required higher performing windows than the original.  Another important design element to consider was that the Bancroft Centre is situated at what is now one of Brisbane’s busiest intersections.

Fronting onto Herston Road, a stones throw from Bowen Bridge Road, bus ways and the Inner City Bypass, shows the heightened necessity for acoustic protection.

The main curtain wall façade utilises the 651 series with highly efficient IGU’s made from Solarplus engineered glass with an acoustic laminate internally to assist with noise deadening. The visible features of the curtain wall replicate that of its neighbour providing a plaid pattern of greens and silver that provide the desired sister building effect.

The balconies use 450 framing with 475 door systems for the balconies’ hinged and sliding doors. A custom solution was introduced with laminated glass incorporating a thick 1.14mm acoustic laminate and energy tech inner lite working together for maximum efficiency and sound protection.

An environmental advantage to being involved in the design of the cladding, minimised the wastage by designing the cladding widths to suit what was commercially available. Approximately 85% of the panels could be made to their natural width.

Unusual Design Elements

The lobby or main entry spans a height of two stories. It has concrete features penetrating through the facade. This required some innovative design to incorporate these obstacles while maintaining the ability to replace the existing framing in a short turn around of a week. 650 framing was used in the lobby to achieve this.

The curtain wall is usually lifted into place by a mini crane positioned on the building.  It is dedicated to the curtain wall install.  On QIMR however, a tower crane had been fitted on site to accommodate phase 2 construction, and is also being used for phase 3.  This meant that fixing the curtain wall had to be timed in between other site deliveries and other uses required of the crane.

This has been a unique project with G.James contributing very early in the design process to assist in setting our the buildings requirements for our own and adjacent works. The achievements so far have culminated with smooth progression though out the project with the mutual assistance and close coordination between Watpac and G.James.

Looking ahead

G.James role at the Bancroft Centre is to be finalised approximately mid 2013, and the entire project to be competed by mid 2014. Tours of the QIMR facilities are available to the public. You can book a tour on the QIMR website.

Free upgrade to blue or green tinted glass

Green Tinted Glass

Green Tinted Glass

Special Offer saving you a minimum of $500*

FREE Upgrade to Blue or Green Tinted Glass**

  • Reduces the sun’s energy entering through your windows by 39%
  • Adds value to your home
  • Colour that never fades
  • Reduced glare

Take advantage of this offer while stocks last!

* On an average size house. Offer available to all buyers.
**Offer applies to Green and Blue Glass installed in new homes and renovations only. Offer valid while stocks last.

Tinted Glass solar radiation illustration

Fig 1. Tinted Glass solar radiation

What is Tinted Glass & How is it made?

Body tinted glass is produced by adding small quantities of metal oxides to the normal clear glass mix during manufacturing of the float glass. The addition of the colours does not affect the basic properties of the glass and the tint will not fade or break down over time.

Solar Heat Reduction

The primary benefit of tinted glass is its ability to reduce the amount of solar energy from the sun entering the home. ( see Fig.1) . Of the 100% of the incident ray from the sun which strikes the glass approximately 47% of this energy is absorbed. A lower Solar Heat Gain improves the comfort within the home and also assists to reduce cooling costs.

Glare Reduction

Standard 4mm clear glass has a visible light transmittance of 89%, both Green & Blue tinted glass offer a glare reduction while still allowing adequate amounts of light to enter the home.

Blue Tinted Glass

Blue Tinted Glass

Daytime Privacy

The reduced visible light transmittance will assist in providing a level of privacy during daylight hours

Aesthetic Appeal

Adding tinted glass to windows of any home improves its aesthetic appeal also adding style and value to your home.

Technical Info (Glass only)

5mm Blue 6mm Green
Visible light transmittance 61% 77%
Visible light Reflectance 7% 7%
Solar Heat Gain Coefficient 0.61 0.61
U Value (W/m2C) 5.8 5.8

Claim this offer

To claim this offer contact your nearest branch and ask for your free upgrade to tinted glass.

Project update: Icon Ipswich

Aerial view of Icon IpswichThe Ipswich City Heart building is the first stage of developer Leighton Properties‘ $1 billion Icon Ipswich project. Designed by Cox Architecture, it is a 42m high, nine-storey office tower which comprises 15,000 square metres (sqm) of commercial space together with 750sqm of ground floor retail and 200 car parks. The building is an A-Grade commercial development, and is targeting a 5 Star Green Star and a 4.5 Star NABERS rating. Nearly all of the office space in the building has been leased to the Queensland government for a term of 15 years. Construction on the project is being overseen by Hutchinson Builders

G.James’ Role

G.James has been engaged to supply and install window wall and curtain wall along the height of the building. G.James is also providing structural glazing to the basement, ground and upper ground floors, as well as a structurally glazed roof-lite to level 1.

Visual Mockup

Prior to starting on site, G.James constructed a visual mockup to provide a full-scale representation of the colour selection as designed for the building. The mockup allowed colour selections to be seen in proper context, under natural lighting, to ensure the building gives the desired visual effect.

The Façade

G.James is using the 546 series system with black anodised framing for the window wall on the western façade with independent vertical sunshades installed between structural slabs. These vertical fins are in 5 special anodised colours (listed below) which are selectively positioned on each floor to create a pattern.

  • Sapphire Matte Tornado Red
  • G.James Residential Bronze
  • AAF Maroochy Sand
  • G.James Champagne Bronze
  • G.James Matte Gold

G.James is using our 546 series system with black anodised framing for the curtain wall to the eastern façade, incorporating gold metallic Alpolic projections and black anodised horizontal sunblades.

The southern and northern faces of the building are a mixture of both window wall and curtain wall fully encapsulating the floors.

The vision glass used in the building is made up of Solarplus DLE55 Low-E glass on green, configured in argon filled IG Units.

The shadow boxes are made up of 6mm green heat-strengthened glass, using 5 different colours (listed below) of backing sheet selectively positioned on each floor to create a pattern.

  • Dulux PVF2 Mars Red
  • Dulux PVF2 Gold Dust
  • Dulux PVF2 Brassed Off
  • Dulux PVF2 Wax Way
  • Dulux PVF2 Blonde Girl

PVF2 paints have an excellent service life and are highly resistant to fading. These properties make PVF2 finishes a low maintenance finish of choice for large projects.

Current Status

G.James started site installation in late January, and will continue until approximately May. Overall, construction on the building is progressing well, the concrete structure of the building has been completed and  practical completion is expected to be third quarter of 2013.

Glass Supply: Era (Pacific Place Precinct)

EraThe Era project is a $310 million dollar, 42 storey development in Chatswood, Sydney being developed by Mirvac. Era is the fifth and final residential building in Mirvac’s Pacific Place precinct. Era features 295 luxury apartments – most of which sold off the plan within a day of release.

G.James’ Role

G.James has been engaged by 3 separate customers to supply a total of 11,150m² of glass for the project.

G.James is supplying clear laminated and toughened safety glass to be used for windows and doors in the project, as well as Colourlite printed glass for some applications. G.James is also supplying heat strengthened laminated glass and heat soaked toughened glass, which will be used in balustrade for the project. Additionally, some heat strengthened glass is being supplied for use in louvres.

Why use Heat Strengthened glass?

Heat strengthened glass is about twice as strong as ordinary float glass and is used generally as a protection against thermal breakage –  it has higher compressive stresses which resist thermal breakage. Heat strengthened has a surface compression induced by a temperature increase and sudden quenching. The existence of the surface compression means that it must be overcome by load before any surface tensile stress is achieved. Heat strengthened glass breaks into large, safer particles. In laminated glass the inter-layer holds these pieces safely in place in the event of breakage.

Point of failure in a sheet of toughened glass due to NiS inclusion.

Point of failure in toughened glass caused by NiS inclusion.

Why use heat soaked glass?

Although rare, nickel sulphide (NiS) inclusions in toughened glass can lead to “spontaneous” breakage. These inclusions are tiny contaminant particles in the raw materials of glass. During the toughening process these particles are altered to an unstable chemical state. If they revert back to the stable chemical state, the particles increase in volume, which can sometimes lead to breakage in toughened glass. This conversion may take years to occur, if happens at all. Heat soaking is a destructive test which heats the glass to 280˚C for several hours to speed up the transformation of any NiS should it be present. This accelerated testing process reduces the likelihood of breakage of installed glass by a factor of 20. Identifying NiS inclusion prior to on-site installation has distinctive cost, safety and security benefits, and is especially important where the consequence of breakage could result in injury – such as when the glass is to be used in exposed elevated positions.

Nickel sulphide inclusions in heat strengthened glass are much more unlikely to cause breakages due to the lower levels of compressive stress.

Looking Ahead

With the continued support from our laminating facility in Brisbane, this project is running on or ahead of schedule and is approximately 50% complete. Era is set to be completed late this year. For more information, please contact G.James glass sales.