LPS 1175 Security Rated steel fencing

Sentry® A1 (SR1) Fencing | Steel Security Fencing

Jacksons Sentry® A1 system offers a security rated vertical bar stopped pale-through-rail solution with a flat top which provides a surface suitable for a wide variety of security toppings. It’s simple minimalist design is equally appropriate for contemporary or more traditional settings and is a great alternative to traditional physical security measures whilst providing improved boundary security.

25 year service life guarantee

Sentry SR1 Features

  • LPS 1175 A1 (SR1) Approved     
  • Secured by Design Preferred Specification
  • Seamless, concealed vandal proof rail to post fixings
  • Fully welded pale-through-rail construction
  • Anti climb design
  • Double row of 25mm high sharp-pointed steel double comb fro additional security comes as standard
  • SR1 gates available


Sentry® A1 panels are up to 3000mm high have two rectangular hollow section rails 60 x 40mm (3 rails if 3000mm high). Vertical round hollow section 32mm pales are passed through the rails with standard spacing at 129mm centres. Panels from 1800mm high have a security comb (double row of sharp steel points 23 x 2mm thick). 


A1 gates available.

Sentry A1 Panel Specifications

Height (mm) Post Centres (mm)
Post Dimensions (mm)
Overall Post Length (mm)
1800 3000 60 x 60 2500
2000 3000 60 x 60 2800
2500 3000 80 x 60  3300 
3000 2484  80 x 60  3800 

Post Options

  • Over length set in concrete as standard
  • Base plated to bolt down onto concrete
  • Cranked to suit wall mounting
  • Standard Finishes

  • Hot dip galvanised to BS EN ISO 1461 as standard
  • Hot dip galvanised and powder coated to BS EN 13438
  • Marine coat for installations within 500m of salt water or an estuary
  • Standard Colours

  • Black RAL 9005
  • Green RAL 6005
  • Other colours are available on request
  • Document Downloads

    Download specification documents, drawings and case studies for this product


    About A1 (SR1) Fencing

    A1 fencing has been tested and certified to provide the minimum level of protection against opportunistic attacks after undergoing the LPS 1175 test devised by LPCB. During testing, our fencing withstood a 10 minute attack from Category A tools such as screwdrivers, pliers and small knives, with each tool given a maximum attack time of 1 minute, providing it with a rating of A1 under Issue 8, the equivalent of SR1 under Issue 7. Find out more and view the full product range here.