LPS1175 Details

Please Note: LPS1175 is not recognized or published by the BSI (British Standards Institute).

The LPS 1175 standard consists of 8 levels of security ratings (SR) which measure the degree of intruder resistance of a security product:




Tool Category* Maximum time attempted to gain entry


Maximum test duration


1 A 1 10
2 B 3 15
3 C 5 20
4 D 10 30
5 D+ 10 30
6 E 10 30
7 F 10 30
8 G 20 60

*Each tool category incorporates all the tools listed in the previous category, in addition to those specified within it.


This offers the base level of security. Products meeting this standard must demonstrate the ability to withstand a total attack time of up to a minute for each tool used, over a period of 10 minutes. The tools listed under this category include those which are hand-held and easily concealed,such as pliers, screwdrivers, a cable/glass cutter, or utility bars. This type of attack would typically require physical force to implement.


The next level up of security would require that a product hold out against a more determined attack; totalling 3 minutes per tool used over a 15-minute period. This would again necessitate physical bodily force, but using tools of greater mechanical assistance, such as a hand drill, hammer, hacksaw or bolt cutter.

Security products certified to SR1 or SR2 are ideally suited to buildings and properties which are prime targets for an opportunistic attack. A good example are locations within built-up areas, where alarm would readily be raised to the noise of an intruder attempting forced entry.

[Image: local high street showing offices/shop fronts – or something
similar which typically represents your target customers’ location]


The third level of protection is designed to thwart an intruder who has intentionally targeted a premises for attack. The requirement here is that the product is able to withstand a total attack time of 5 minutes over a 20-minute period (accounting for tool change, rest and observation time). The tools included under this category incorporate a wider, larger selection of attack options such as an axe, gas torch, crowbar, 7.2V cordless drill and scissor jack.

Certification to this level of the LS 1175 standard would provide the necessary security to a building against deliberate forced entry by a well-equipped assailant.

[Image: Example of a PortaNova door in this category – perhaps
close-up of locking mechanism]

SR4 and SR5

Security products which are certified to either of these levels, require that they are able to resist an attack by an experienced and prepared intruder for a total of 10 minutes of physical attack over a period of 30 minutes (accounting for tool change, rest and observation time). The tools included under SR4 are those such as a 12V disc grinder, k-tool lock remover, sledgehammer and plate shears. The D+ category of tools listed under the requirements of SR5 feature more powerful appliances, such as an 18V cordless circular saw and 18V reciprocating saw.

This level of protection is often employed in high-security, high-risk premises such as government buildings and those housing critical infrastructure or high-value assets.

[Image: Ministry of Defence building]

SR6 and SR7

The top-level protection offered by these levels, demonstrate the ability for a product to withstand an intensive attack by a highly professional assailant for up to 10 minutes of physical attack over a period of 30 minutes (accounting for tool change, rest and observation time). In addition to mains powered tools, both classifications cover the possibility of the intruder using battery powered or petrol driven appliances. Examples of tools for SR6 are a 1100W circular saw/disc grinder and glasmaster saw. SR7 additionally includes tools such as an enforcer, oxyacetylene cutting kit and 2000W reciprocating saw.

Products achieving this level of protection would likely be used to guard entry to extremely high value, high security areas, with forced entry attempted after first breaching any primary façade.


Providing the ultimate in security, certification to SR8 would require a product to resist extreme attempts at forced entry, with a total attack time of 20 minutes over a 60-minute duration (accounting for tool change, rest and observation time). Testing to this level utilising tools such as a 1900W breaker, concrete chainsaw, hydraulic jack and pneumatic impact tool, is designed to replicate the intensity of an attack before an assailant would resort to the use of vehicles, firearms or explosives.

Whilst part of the LPS 1175 standard it is of note that, to date, no manufacturer has yet produced a product which meets the stringent criteria for the highest SR classifications. The rigorous testing measures are what
largely contribute to the LPS 1175 status as a world-class certification standard, and serves as a recognised benchmark for the security and protection of buildings and premises.