Planning Is Key For Commercial Jobs

Because they are more complex than domestic jobs, commercial jobs can seem daunting and overwhelming, but Pryda is here to help. We’ve developed a checklist to help you get the information you need, when you need it.

One of the most important factors is to gather information at the quotation stage. For example, if you require design or inspection certification, you’ll need to contact Pryda’s design department for a quote and include that in your costs right from the beginning.

Similarly, the difference between selecting a commercial building type in Pryda Build i, when it should have been an essential building type, can seem like a small mistake. However, this can result in different design for the girders which again can end up being a costly small mistake. It’s important to get these things right, from the start.

The same applies for engineering documentation. If there are items that require clarification it is always best to contact our engineers at the quotation stage. We’ll then communicate with the building’s engineer to clarify any issues and convey the outcome back to you. Doing this at the quotation stage ensures your costs are accurate and don’t require major revision down the track.

There are four major areas that we recommend you focus on in your planning. Firstly, speak to the builder about the need for design and inspection certification and details of the building surveyor. Next, look at the architectural drawings for things like ceiling fixings, roof battens and other features like light-wells and walkways. The structural drawings will provide information regarding loads, bracing, wind speeds and support. Lastly, you’ll be able to find whether you need to allow for mechanical units or special fire and acoustic requirements by referring to the service drawings.

Get these things right and we think you’ll find commercial jobs that little bit less overwhelming. Plan carefully right from the beginning and get all the information you need to submit an accurate quotation. And if your plant is quoting on a lot of commercial jobs, Pryda’s engineering department can offer training on how to best approach these jobs. We’re only a phone call away.

Pryda Span Helps Meet Height Restrictions

One of the great benefits of using Pryda Span floor trusses, in the $6 million Richmond custom-built six-unit complex, was the ease with which I met height restrictions on buildings imposed by Yarra City Council,” reveals Avanzi Constructions’ builder, David Grant.

“Because of its open-web construction, Pryda Span was in its element because we could pass all the services (electrical wiring, plumbing and air conditioning ducts) straight through, allowing us to maximize internal space height,” he said.

“If it had been alternative timber joists, we would have had to construct bulkheads for these services. Ceiling heights would also have had to be reduced to the minimum 2.4-metre requirement – as opposed to the 2.7-metre heights achieved in the upstairs living areas in all units, through the use of Pryda Span metal webs.”

Building height restrictions are critical in inner suburbs like Richmond, where substandard block leads to problems of overshadowing next-door abodes if strict council regulations are not adhered to when constructing multi-storey units.

“We are talking about six two and three-storey units with a common driveway on a 1000 square-metre block that previously accommodated two people,” Mr Grant said.

Faced with narrow equipment access, David Grant – who began the project (scheduled for completion in June) in July last year – decided to build outwards from the rear of the block so building materials could be more readily delivered and installed.

Dahlsens won the tender for the roof and floor trusses, delivering 900 lineal metres of Pryda Span to predetermined lengths as required.

“The longest span was 5.5 metres,” Mr Grant said. “However, Pryda Span is so light to handle there is a 15-20 per cent time saving in laying the product and passing the services, that more than compensates for any additional material costs that might be incurred.”

Another benefit of using Pryda Span was that, once it was in place, flooring could be laid immediately and internal stairs installed – providing a much safer work environment on the Richmond site.

However, it is the net installed cost benefits of its fully engineered open-web floor truss systems that Pryda is keen to promote – whether it be timber webs (Pryda Longreach) or metal webs (Pryda Span).

While the company acknowledges a possible material cost increase when compared with other flooring systems, installation provides significant labour savings and design advantages leading to overall cost benefits.

An interesting case study is the St Clair Park Village outside Auckland, New Zealand. Despite a six per cent increase in material costs by using Pryda Longreach floor trusses instead of solid joists, framing time was reduced by two weeks. This meant labour saving was 2.5 times the material cost increase resulting in an overall reduction of project costs.

In addition, open-web floor trusses have considerable design advantages that could result in reducing the requirement for costly support construction – for example, using long spans may eliminate the need for some internal load bearing walls.

Where architects and designers require greater scope, Pryda can provide extra long spans (up to 7.1 metres at 400mm depth using MGP12 pine) and large cantilevers with the ability to support high loads.
Pryda floor trusses also are ideal for sloping blocks and in some instances their use may eliminate or reduce associated excavation costs.

Each floor truss is customized for the job by the licensed Pryda Fabricator – including required stiffness, depth, timber grades and span – and computer designed using Pryda design software for optimal performance and cost and installation efficiency while eliminating waste.

For enquiries on Pryda floor truss systems please contact Pryda Australia on 1800 810 741.

Consider The Net Installed Cost Saving Of Floor Trusses

The Pryda fully engineered open-web timber floor truss systems with timber webs (Pryda Longreach) or metal webs (Pryda Span) have many advantages that result in a lower net installed cost compared to other floor systems that are available.

In some instances there may be a material cost increase by using Pryda floor trusses over alternative flooring systems. However when it comes to installing the product, Pryda floor trusses can provide significant labour savings.

At the St. Clair Park Village development the builder chose Pryda Longreach floor trusses over solid joists. There was a 6% increase in material costs, however framing time was reduced by 2 weeks. The labour savings was 2.5 times larger than the material cost increase.

In addition, floor trusses have some considerable design advantages that could result in reducing the need for a large amount of costly structural support construction. E.g. Long spans may reduce the need for internal load bearing walls.
Pryda floor trusses are custom designed for the job by licensed Pryda truss plants. The design incorporates required stiffness, depth, timber grades and span to achieve optimal performance, cost and installation efficiency.

Go to or call 1800 810 741 to find out more about Pryda floor trusses and locate your preferred Pryda truss plant.

Pryda Cyclonic Grip Battles Cyclones

Pryda has developed a new 90mm cyclonic grip in its latest battle against cyclones.

The grip is used in high wind regions for tying roof trusses to wall frames and has been added to the Pryda range to suit the increasingly popular 90mm steel frame.

The new 90mm cyclonic grip complements Pryda’s high capacity tie down product range. The product category includes tie down plates, grips and overstraps that provide uplift capacity up to 100kN. The existing cyclonic grip is 58mm wide and has been specifically developed for steel frames with a stiffened top plate.

On their own, the Pryda cyclonic grip can achieve tie down capacities up to 14kN – but when doubled up with an overstrap, tying down a timber truss on a stiffened steel top plates achieves up to 38kN capacity.

The 90mm cyclonic grip can be fixed into steel top plates using M6x22mm GX screws or 10 gauge x 16mm Teks screws. If the grip is fixed to timber top plates, 12 gauge x 35mm type 17 screws need to be used.

The Product Update section of the Pryda website contains all design data for the complete cyclonic grip range.

Pryda Shear Connector Straps Replace Timber Blocks

The Pryda Shear Connector has been developed to be used in pairs to transfer the racking loads from the ceiling diaphragm to non-load bearing internal bracing walls. They can be used as a direct substitute for a pair of nail fixed timber blocks as specified in Table 8.22 AS1684.2:2006 and AS1684.3:2006.

The Shear Connector has superior design capacities over timber blocks and alternate brackets, while carpenters will benefit from the ease and speed to install this product compared to substitute products.

The advantages include:

• Can be installed with collated nails rather than hand driven nails only;
• No messing about having to hand drive nails into the corner holes of alternate brackets;
• Easy to fit, especially with oversized or swollen timber;
• Accommodates all timber widths, including double trusses;
• Long term performance is not affected should the nails have been overdriven;
• Low cost for a guaranteed performance, should only add $12 – $15 cost to the job.

For more information on Pryda’s new Shear Connector do not hesitate to contact Simon Healey at Pryda Australia on 03 9554 7001.

Pryda Shear Connector installation when truss is perpendicular to the wall frame

Pryda Shear Connector installation when truss is parallel to the wall frame

Non Compliant Products To Be The Focus Of An Industry Campaign

At a recent summit the Housing Industry Association has signalled that it will spearhead a campaign to address the problem of non-compliant building products in the residential housing sector.

Areas of concern include but are not limited to – strapping, bracing and tie down connectors, concrete and reinforcing, structural grade timber and LVL, structural steel, steel framing, windows and glazed doors, balustrading, roofing and wall cladding and masonry materials.

“The problem of non-genuine and non-tested building materials and components making their way into in residential building is growing,” said HIA Managing Director Shane Goodwin. “Our view is that regardless of where something is manufactured, it should meet Australian standards.”

“It was clear from the debate at this week’s summit that there are products being used in Australia that are not fit for their intended purpose. This can have consequences such as subsequent repair costs, damage to the reputation of the building industry and potentially threats to human health and safety.”

“Our message is that it’s just not worth the risk of using inferior materials and components.”

The summit also identified the problem that inconsistent compliance regimes led to an uneven playing field between manufacturers that comply with standards and those that do not.

“Manufacturers who do the right thing are being disadvantaged against those that neither invest in producing products that meet Australian standards nor programs to demonstrate compliance.”

Pryda has identified (via independent and internal testing) that at times some suppliers are selling bracing and timber connector products that fail to comply with the relevant Australian Standards including AS1684 part 2 and 3–2010 Residential Timber Framed Construction.

“It is Pryda’s intention to participate in training and marketing campaigns with representatives of building approval bodies such as the Australian Institute of Building Surveyors (AIBS) and industry associations such as the HIA to raise the awareness of non-compliance. We expect this initiative, in conjunction with the campaign launched by the HIA, will assist building practitioners in selecting compliant products and building surveyors to assess whether buildings comply with building regulations,” said Pryda’s Category Manager David Taylor.

The standards which are referenced by the Building Code of Australia are AS1684.2-2010, AS1684.3-2010 and AS1684.4-2010.

Bracing and timber connector products which meet the requirements of these standards are deemed to comply with the requirements of the Building Code of Australia. To be compliant, a product must meet these standards or prove performance to otherwise comply with the Building Code of Australia.

The Standard for Strap, Bracing and Timber Connectors
AS1684.2-2010 has specific requirements for products to meet the standard, the minimum requirements are –

  • Minimum corrosion resistance of Z275 – the thickness of galvanising on the products.
  • Bracing and structural connectors cannot be manufactured with general manufacturing steel; they must be manufactured using G300 structural grade steel or equivalentwhich has guaranteed minimum yield strength. This is critical as the published engineering design data is based on the steel’s minimum strength.
  • In the case of bracing products there are minimum dimensional requirements.
    • Metal Angle Brace
      • 18 x 16 x 1.2mm (Mini Brace) to achieve 0.8kN/m bracing unit.
      • 20 x 18 x 1.2mm (Maxi Brace) to achieve 1.5kN/m bracing unit.
    • Strap Brace & Tensioner
      • 30 x 0.8mm strap with tensioner hole to achieve 1.5kN/m bracing unit.
      • 30 x 1.0mm strap with tensioner hole to achieve 3.0kN/m bracing unit.

Pryda’s Observations
David commented that, “Over the past two years Pryda has in their own testing laboratory and independently, carried out tests of different types on many brands of product purchased from trade & hardware stores around Australia. That testing has shown that some products (builder’s strap, angle brace and framing anchors) do not meet the specifications as detailed in AS1684.2.”

“Traders have an obligation to supply products that are fit for purpose. Therefore Pryda is undertaking a campaign to make the requirements of the standard known and for traders to satisfy themselves that their supplier is providing them with products that comply.”

Why is it important
“Following the HIA campaign it is likely that their members, builders and building inspectors will be asking whether the products that they purchase or inspect comply. To avoid embarrassment and a potential loss of customers, you should be certain that you supply code compliant products.”

What should hardware merchants & truss plants do
“For their own peace of mind they should be aware of the requirements of the standards, their own obligations to provide products fit for purpose and ensure that their supplier can provide them with engineering specification, to show how the products perform under load such as the Pryda design guides and a certificate of compliance to the standards. If their supplier can’t provide those things they should find one who can,” David said in closing.