A new approach to High Security Fencing

  Approved to SEAP class 3 & 4 requirements

The Paramount Portcullis™ palisade system is designed primarily for defence against Intruders but also acts as a substantial deterrent against climbing from the inside of the secure establishment, acting as a means of defence from those persons attempting to steal protected items from within.

Portcullis™ Security Palisade's main objective is to provide a high security perimeter fence to sites of significant strategic importance and establishments of a long term nature with high security risks, such as Water treatment works, Power and gas facilities, essential public services, military bases, prisons, bullion and currency manufacturers, refineries, computer and communication centres.

The design has been prepared with a high regard for its appearance, and attention has been given to ensuring the visual impact is more acceptable than other forms of high security fencing. In all important respects Portcullis™ has been designed to comply with, and in most cases, is superior to BS 1722 part 12.

The normal life expectancy embodied in the design and quality of the materials employed is twenty five years without major maintenance in all environments.

Gates The gates designed for use with Portcullis™ have been carefully detailed so that they provide the same deterrent to climbing and resistance to forcible attack as the fencing system. A wide range of widths are available to suit pedestrian and vehicular access.   Sophisticated locking systems can be incorporated to suit a clients specific requirements.    Resistance to Climbing The external face of Portcullis™ Palisade has a smooth surface with no helpful projections. The two horizontal rails are spaced widely apart and the gaps between the pales are small with no convenient hand or toe holds to sustain an attempt to climb the fence.

Resistance to Dismantling                 Alternative pale fixings Thoughtful design gives maximum resistance at attempts to dismantle the panels. The type of pales used are extremely resistant to bending in any direction and their spacing makes cutting by hacksaw or metal shears an awkward operation. All fixings are resistant to tampering. The standard method of fixing the pale to the rail is by one 10mm dia. high tensile spun galvanised bolt top and bottom. Alternatively, a 10mm stainless steel high clench bolt can be supplied. Post to rail connections utilise Cup headed bolts which cannot be turned from outside the fence line. It is not possible to remove the assembled panel of palisade from within the flanges of the fence post and its size and weight make it extremely difficult to lift without mechanical means. Support feet at the bottom of each panel provide resistance to ramming and crowd pressure and gives added protection against dismantling of the fencing. Even when an attack has destroyed the fixings the Pale is still retained in position by the Bressumer Rail

Design Portcullis™ Palisade has been designed to withstand wind loads applicable to zone 2 i.e. 900 N/m² at right angles to the plane of the fence employing a shape factor of 2 on the net area presented to the wind.

Intruder Protection The design makes provision for the installation of other deterrent systems such as, barbed wire or barbed tape and where deployed with these additional items Portcullis™ complies with the requirements of SEAP 3 and 4 dependant on the height specified. Electronic or CCTV surveillance systems can also be deployed where maximum security is to be achieved. Portcullis™ Palisade is a robust system and the possibility of wind induced vibrations which might increase the alarm rate from vibration or noise sensors is reduced to a minimum.

Erection A detailed specification PSP 6-1991 is available  on request for use by fencing contractors. Portcullis™ Palisade is supplied in standard panels suitable for flat sites or those with a gradient of 1:10. Sites with gradients in excess on 1:10 will require purpose made panels. Standard panels have posts at 2.75m centres offering an economic balance between foundation costs and the size of members employed in the fence construction. Make up panels are normally provided to suit site dimensions at points of intersection or at corners. Portcullis™Palisade is delivered to site piece small and is erected insitu employing normal erection techniques and labour skills.