Severe thunderstorms are more common than any other natural hazard and can occur anywhere in Australia. Each year, on average, severe thunderstorms are responsible for more damage (as measured by insurance costs) than tropical cyclones, earthquakes, floods or bushfires. And unfortunately as defined by the Bureau of Meteorology, a severe thunderstorm is one that produces
With this in mind NETPRO have developed a Hail Protection Canopy that has been designed especially for the Australian climate and extreme hail evens.
NETPRO Protective Canopies have developed a Hail Protection Canopy that has been designed especially for the Australian climate and extreme hail events.
The NetPro patented Pitch System uses a stable (non-stretching) net erected in a pitched roof pattern. The falling hail is directed down the valleys so as to exit the structure at allocated spacings. A pitch structure is best able to withstand heavy falls and is the "rolls-royce" of the net systems, and shedding the load reduces the risk of major structural failure during large hail events.
The Pitch System requires fewer internal posts - allowing increased internal grid spacings.
An optional addition to the Pitch design are side-cloths for wind, hail and pest protection.
For areas subject to snow fall, a number of modifications can be made to the pitch system to maintain structural integrity.
During the heavy hail-storm of 2006 in the Stanthorpe area, it was reported that pitch systems performed well.
CANOPY PERFORMANCE UNDER EXTREME CONDITIONS: Published Article - more
The Cable Grid: the overall design is based around an independent grid of tensioned primary RIDGE cables supported by structural posts and tensioned to the external anchors. As the cable crosses an internal post it sits in a specially designed post cap; the cables are terminated at the top of each post using a 4-way connector, enabling the transfer of load if required. Secondary VALLEY wires are positioned and tensioned - these are the connection points for the base of the covers (hail exits).
Canopy / Seam Construction: the canopy covers are connected to the primary Ridge cable and then clipped to the Valley wires using specially designed clips which fit into the reinforced eyelets of the hail-guard covers.
Canopy Material: the net of choice is a stable (non-stretching) product which enables the hail to flow to the valley of the structure. In contrast, other options would not allow for enough internal tension, causing the hail to pond and create load. The recommended product has reinforced centre and edges; and a manufacturer's Pro Rata UV warranty of 10 years. Side-cloths are usually constructed using Netpro's proprietary Q net.
Cover Replacement: the covers are independently installed and are joined in one direction to allow for ease of maintenance and to reduce transfer of wind load to neighbouring covers. In the case of storm damage, covers can be replaced or repaired independently with no disruption to the remainder of the site. Due to the nature of the pitch design, there is very little movement in the canopy covers - therefore the structure is relatively maintenance free.
NetPro Protective Canopies have developed a Hail Protection Canopy that has been designed especially for the Australian climate and light to moderate hail events.
Flat Roofed Structures perform well in areas of light to moderate hail, and are also ideal for wind and UV-light protection. It is on the flat-roofed structures where Netpro's proprietary product, Q net, really comes into its own. The canopy material is supported by a tensioned cable grid. Light falls of hail will pocket in the net, stretching the net down between the cables. In the event of a more severe storm, damage can occur and possible maintenance may be required.
The canopy material and internal post spacings are determined by the canopy's overall design parameters. The Q net is rigorously tested for distortion before construction commences, enabling NetPro to reduce the canopy sag to approximately 100mm.
Structural Support Posts: All structural support components are independently engineer specified as per the Protective Canopy design requirements.
Support Cables: Composed of concentric layers of wires cross-laid to prevent rotation, coated with heavy duty galvanising to ensure optimum resistance to corrosion; the support cables are designed for minimum elongation under load.
Cable Stays and Terminations: NetPro splices smoothly connect and terminate cables, forming no projections to damage canopy materials. Cable stays are parallel double cables, and can also be used to support side covers.
Reinforcing Edge Wire: High Tensile Spring Steel Wire is woven along the reinforced cover edge, and clipped to the support cables.
Hot Dip Galvanising Treatment: All steel fabrication is completed prior to galvanising, which is done in accordance with Australian Standards.
Footing Systems: All structural footing dimensions and components are independently engineer specified as per the Protective Canopy design requirements and site conditions.
Our materials are specifically designed for the Protective Canopy industry.
We do not use standard "off the shelf" products.
NetPro have qualified contractors ready to install your new Protective Canopy Australia-wide.
Using local contractors ensures a quick response during times of crisis and cost effective maintenance programs.
VEHICLE COVER TESTIMONIALS:
Success Stories View all
As major investors in the Australian horticulture industry, Rewards Group Ltd needs to ensure maximized returns on all funds invested, particularly in orchard infrastructure. Accordingly, our choice of contractors is critical to the final success of any project.
We currently have 250 acres of net – about 80% of our orchard area. Without the protective canopy, we wouldn’t be able to supply our market requirements. Quality is important to us and we wouldn’t be able to meet the specifications of our customers without net.
We particularly liked the product offered by NetPro – high quality was our main criteria. The option of wooden posts was also an important feature because of the highly-corrosive conditions in the feedlot environment. We were able to work through the construction plan and the materials options during the quoting process.
We chose NetPro to construct our protective canopies, as we know NetPro have been around for some time, we know their work and there are plenty of examples of their work around – we like the consistency of standard. In addition, NetPro are recognized by the Finance bodies, and it is much easier to get finance for a structure.
I think it has made all the difference to the quality of our product – it has saved us from bird attack and from hail damage." Since 2001, Robert Channon Wines have won 23 trophies, 17 gold medals, 26 silver and 55 bronze medals.
We live in North Queensland and have a nine metre pool. We needed to replace the pool cover but most local businesses we contacted wanted to replace it with a shade sail and the one quote we received to fabricate a new cover to our design seemed exceedingly high.
In 2003, Golden Valley Orchards were offered the opportunity to work with the NCEA (National Centre for Engineering in Agriculture) and NetPro Pty Ltd on a research project evaluating the effectiveness of (amongst others) NetPro's dam-covers.
"I think it has made all the difference to the quality of our product – it has saved us from bird attack and from hail damage." To date, Robert Channon Wines have won 23 trophies, 17 gold medals, 26 silver and 55 bronze medals since 2001."
Initially the idea of the net canopy over the landfill was discussed with Netpro as they are a local company and at the time Netpro was considering advancing into this area (protection of landfills). Netpro assisted Council with a very reasonable price which allowed the project to proceed.
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