1. LPS 1270 Information

    The Standard LPS 1270 is for the 'Requirements and testing procedures for the LPCB approval and listing of intruder resistant security glazing units'.

    The purpose of this standard is to evaluate the resistance to unauthorised access offered by security glazing  units. The standard specifies eight grades of security according to the tools and time likely to be used by a criminal. It is based on the same classification system contained within LPS 1175, this enables specifiers to select security glazing that provide defined levels of security matching their needs.

    Testing is conducted on samples with a size of 865mm wide by 1930mm high within a rigid test frame defined in BS 6206 : 1981 - Specification for impact performance  requirements for flat safety glass and safety plastics for use in buildings, at a temperature between 18°C +/- 30°C after test panels have been held at these temperatures for a period of 24 hours.

    For LPS 1270, scorings are required for three hole sizes, of which a final three digit score rating is achieved, eg 1-2-3, or 2-2-4, etc. The sizes and purpose of these holes are as follows:


    1st Digit - Local Penetration - 8mm (-0mm/+3mm) by 25mm (-0mm/+3mm) rectangular section.

    This is to determine resistance to the creation of a hole through which a piece of wire, screwdriver, lever, or other such device can be passed in order to operate a panic bar, emergency lever handle or other non-deadlocked device capable of releasing the bolt-work on the item or an item directly adjacent to that in which the glazing is mounted.

     

     

    2nd Digit - Hand Hole - 60mm (-0mm/+3mm) diameter.

    This is to determine resistance to the creation of a hand hole through which the attacker can either, directly access the valuables within or reach through the aperture to operate an unprotected thumb-turn or latch to release the bolt on an adjacent door and gain complete access.

     

     

    3rd Digit - Complete Access - Elliptical section of 400mm (-0mm/+3mm) major axis by 225mm (-0mm/+3mm) minor axis 

    This directly reflects the size of the aperture specified in LPS 1175 and ensures the glazing offers resistance to complete access through the glass commensurate with that provided by products approved by LPS1175

    The same attack test requirements for LPS 1175 are conducted for LPS 1270 test specimens, whereby the tester has access to a specified tool set/s and a predetermined period of time in which to create the required hole size. There are 8 Security levels for LPS 1270 and LPS 1175 of which Level 1 is the weakest and 8 being the highest level of security afforded. The security rating requirements for each security level can be seen in the chart below with the required tool category tested: