LPS 1270 Issue 1.1 Requirements and testing procedures for the LPCB approval and listing of intruder resistant security glazing units

This standard describes tests for classifying the intruder resistance of security glazing units.

The intruder resistance of the security glazing unit is classified regardless of design or materials used in its construction.

The resistance to thermal shock attack, chemical attack, explosion or ballistics are outside the scope of this standard.

The adequacy of the installation method is not assessed or classified because it depends on the product into which the glazing unit is fitted. It is assumed that the products into which the glazing unit is fitted, and the methods by which the glazing unit is installed, are classified in accordance with LPS 1175: Issue 7 Requirements and testing procedures for the LPCB approval and listing of intruder resistant building components, strongpoints, security enclosures and free-standing barriers.

The standard was developed because the current method for classifying the attack resistance of security glazing (BS EN 356: 2000 Glass in Building – Security Glazing – Testing and Classification of Resistance Against Manual Attack) is not considered to be compatible with that employed within LPS 1175: Issue 7. This is because:

• BS EN 356: 2000 does not classify glass according to its resistance to different levels of attack based on the tools and time available to an intruder.
• The tests contained within BS EN 356: 2000 do not evaluate the glass’s susceptibility to attacks involving the creation of small holes through which locking hardware may be manipulated and/or protected items, such as items on display within shop windows or display cases, may be removed.
• Glazing materials rated to BS EN 356: 2000 that have been included within products and systems tested to LPS 1175: Issue 7 have undermined those product’s/system’s ability to offer intruder resistance commensurate with the security ratings sought to LPS 1175: Issue 7.

The classification system presented within this standard will aid specifiers wishing to determine whether a security glazing unit’s intruder resistance is commensurate with that provided by security products and systems rated in accordance with LPS 1175: Issue 7.

When selecting security glazing units it is important to consider other aspects of the barrier or enclosure into which the glazing unit is to be fitted, for example the method by which the glazing unit is held in place. Manufacturers and specifiers should therefore ensure the complete barrier or enclosure is assessed and classified in accordance with LPS 1175: Issue 7.

Attack face(s)

The surface(s) of a glazing unit confronting the person attempting forced entry.

Glazing unit

A specific configuration of glazing formed from either a single sheet of glazing material or multiple layers of glazing and/or plastic material formed or adhered together to form a unit with or without gaps between each layer.

Intruder resistance

The capacity of a glazing unit to withstand forced entry.

Manual intervention attack test

An attempt at forced entry through a glazing unit by a person using tools.

Security glazing unit

A glazing unit designed to provide resistance to manual attack.

Security glazing film

Plastic film adhered to the surface(s) of a glazing unit to enhance its resistance to manual attack.

Security rating

A numeric indication of the resistance to manual attempts of forced entry provided by a glazing unit.

Total test time

The maximum duration of an individual manual intervention attack test. It is the accrued sum of the:

• working time;
• rest time of an operative for well being and safety reasons;
• time taken to change tools or exchange defective expendable tool elements; and
• inspection time called by the project leader.

Working time (resistance time)

The time of an individual manual intervention attack test in which a tool or tools is used to attempt to create a change in the test specimen.

The working time excludes:

• rest time of an operative for well being and safety reasons;
• time to change tools or exchange defective expendable tool elements; and
• inspection time called by the project leader.

3.1 Documentation required from client

An applicant shall furnish comprehensive information about the glazing unit to the LPCB for consideration prior to examination and testing. This shall define the construction of the product over the range to be covered by the evaluation. It shall include:

1. Details of the applicant and, if different, the manufacturer of the glazing unit(s), including:
   • Name of manufacturer.
   • Place of manufacture.
   • Year of manufacture.
   • Relationship of applicant to manufacturer.
   • Company responsible for design and quality assurance.
2. Specifications for all materials used to form the security glazing and the method by which the glazing is manufactured and assembled.
3. Instructions and specification for secure installation / use including limitations for any security glazing films being submitted for evaluation.
4. The face of the security glazing designed to resist manual attack.
5. The applicant’s security rating expectation.
6. f) Quality plan covering the control of the composition and quality of the security glazing film and/or glazing units to be classified, from receipt of raw materials through to despatch of completed glazing units. This shall include all relevant specifications for processes critical to the products/materials providing their defined performance.

All documents shall be dated and given a reference number and issue description.

3.2 Specimens to be supplied for testing

The following shall be observed subsequent to the acceptance of an application for approval:

1. The applicant shall supply an agreed number of specimens.
2. The number and type of specimens selected shall be representative of the range of glazing units and/or security films to be assessed and shall take into account likely differences in performance provided by each within the range and the classification(s) sought. The specimens selected shall cover the most vulnerable aspects of design, composition and configuration.
3. It is not necessary to undertake additional tests on glazing units incorporating additional layers to those present on the glazing unit tested providing it can be proven that the attack resistance exhibited by the glazing unit tested is not undermined by the application of the additional layers.
4. The size of the specimens shall be as detailed in clause 4.4.2.
5. If a prototype glazing unit is supplied for testing, approval will not be given for that configuration until the specification documents and quality plans for subsequent series production have been examined and confirmed that they accord with the tested prototype or that any changes will not reduce the security rating.

Note: Changes to production methods or design between prototype and final production stages may affect the product’s performance. Therefore, it is not automatically possible to attribute security ratings achieved by prototype test samples to subsequent series production.

1. When the product incorporates advances or changes in technology, then additional sample pieces, parts or sections can be requested for evaluation prior to the supply of the agreed specimens.