Palisade Security Fencing
Unauthorised access to property can result in the death or permanent injury of persons, financial loss from theft or damage to property, disruption to operations with resulting financial claims from customers, and environmental damage. Accordingly, failure of perimeter security fencing is a key risk for the operators of high risk or high value assets.
Palisade fencing is considered an ‘intruder resistant’ fence type. With the right product selection and install it can provide a very high level of perimeter security to deter and delay unauthorised access to a property. Palisade fencing consists of rolled steel pales (normally about 70mm wide at 150mm centres), in a W or D profile, being bolted with anti-tamper fasteners to horizontal equal angle rails (two or three) that are bolted to posts. The pales are very rigid making attack or scaling of the fence very difficult.
The attributes of palisade fencing are:
- Being intruder resistant meaning it is a fence design that minimises the likelihood of unauthorised entry by going over, under or through the fence without the aid of tools.
- The style of fence maintains a level of visibility through the fence that aids natural surveillance of the asset thus deterring unauthorised access and aids detection.
- The gauge and design of materials used makes penetration through the fence difficult.
- The design of the fence makes scaling the fence difficult especially if additional topping is added.
- The product is ordinarily hot dip galvanised after fabrication. The heavy zinc coating gives very good corrosion protection service life (circa. 35 years).
- As the pales are affixed to the rails on site, palisade is a style of fencing that accomodates changes in gradient a lot better than other fence types.
- The open style of the pales is less prone to spray painting than more ‘solid’ fence types such as Colorbond cladding.
- It is an aesthetically pleasing perimeter security fence that is particularly suitable for residential and built up urban areas..
The features of our palisade security fencing include:
- The option for a unique pale to rail fastening that has superior resistance to failing as a result of hammer impact or levering, compared to the current T bolt and shear nut.
- The option for a pale with anti-cut qualities that is much harder to cut than the standard pale.
- Superior powder coating processes involving an acid rinse (mild etch) of the hot dip galvanised surface before powder coating.
The key risks for purchases of palisade fencing include:
- Pales that fail flex tests (per BS 1722-12) due to poor quality steel material and rolling processes. Result: the pales will bend easily.
- Pales that fail fastener strength tests (per BS 1722-12) due to poor quality steel material and rolling processes. Result: the bolts will pull through the pale.
- Poor hot dip galvanising process. Result: the corrosion protection service life will be compromised.
- Poor quality hinging on gates. Result: failure of the hinge resulting in potential injury.
- Poor powder coating processes of the hot dip galvanised product. Result: the powder film will delaminate early in its service life.
Reference sources for purchases and specifiers of palisade fencing include:
- BS 1722-12:2006 Fences. Specification for steel palisade fences (there is no Australian equivalent standard).
- ENA Guidelines (ENA DOC 015:2006) ‘National Guidelines for Prevention of Unauthorised Access to Electricity Infrastructure’.
- AS/NZS 1163:2009 Cold-formed structural steel hollow sections.
- AS/NZS 3678:2011 Structural steel - hot-rolled plates and floor plates.
- AS/NZS 4680:2006 – Hot dip galvanized (zinc) coatings on fabricated ferrous articles
Palisade fencing is also regularly combined with electric fencing, barbed wire topping, anti-tunneling measures and perimeter monitoring systems to provide a high level perimeter security solution.
Typical applications for palisade fencing include:
- Technology Parks
- High-voltage switchyards and sub-stations
- Rail corridors
- Protecting critical assets
- Sea ports
We supply and install palisade security fencing to:
- Adelaide metro and regional South Australia
- Canberra and the ACT
- Sydney metro and NSW South Coast
- NSW Central West and North Coast
- NSW North West and Central West
- Brisbane and South East Queensland