LPS 1175 E10 (SR5) Security Rating: Certified Curtain Walling and Gates

LPS 1175 E10, the Issue 8 rating commonly compared with SR5, certifies that a complete product has resisted a sophisticated, well-resourced attacker using high-end 36V cordless tools for at least ten minutes. It is widely specified for critical national infrastructure, government buildings, military sites and high-security embassies, and it sits at the top of Premier Security's certified range. Premier Security Ballistic & Blast Ltd manufactures E10 certified Ultimate High Security Curtain Walling 5 and Kraken 5 automatic sliding gates, both listed on LPCB Red Book Live.

What Does LPS 1175 E10 Mean?

LPS 1175 is the Loss Prevention Standard for intruder resistant building components, published by the Loss Prevention Certification Board (LPCB), part of BRE Global. Every Issue 8 rating has two parts: the letter sets the tools the attacker can use, and the number sets the minimum delay in minutes the product must achieve.

At E10, the test team attacks the locked product with Category E tools and must not create a 400 mm x 225 mm opening, the minimum size a person can climb through, within ten minutes of working time. Any part of the assembly can be targeted, including frames, glazing, infill panels, locks, fixings and the gate or facade structure itself.

The Category E tool set

Category E represents a sophisticated attacker with the most powerful battery tools commercially available, prepared to make noise and work through a sustained attack. The kit includes everything in Categories A to D plus:

• Categories A to D: hand tools, bolt cutters, an axe, a crowbar, a gas torch, sledgehammers and 18V cordless disc grinders, reciprocating saws, jigsaws and circular saws
• Added at Category E: 36V cordless tools, 750W reciprocating saws and high-power circular saws

The step from D10 to E10 keeps the same ten-minute delay but raises the power of the cutting tools. Higher-voltage saws and grinders cut faster and deeper, so an E10 product has to resist a much more aggressive cutting attack for the full ten minutes.

E10 vs SR5: Issue 8 and Issue 7 Explained

LPS 1175 Issue 8 came into effect in 2019 and was the most substantial revision of the standard to date. It replaced the single SR1 to SR8 scale with a tool category letter (A to H) followed by a minimum delay in minutes (1, 3, 5, 10, 15 or 20). E10 is the Issue 8 classification commonly compared with the old SR5.

Under Issue 7, the tool set behind SR5 was an enhanced Category D kit, often written as D+. Issue 8 made it a category in its own right, Category E, which is why the SR5 equivalent carries a new letter rather than a longer delay. All of Premier Security's E10 products are certified under Issue 8, so their certificates show E10 and the products can be described as E10 (SR5).

Premier Security's E10 Certified Products

Premier Security holds LPCB certification for the following products at E10. Openings outside the certified scope are not covered by the rating, so our technical team will confirm the certified configuration for every opening.

E10 and Combined Threat Protection

Sites that need E10 often face more than one threat. LPS 1175 covers forced entry only, so ballistic, blast and vehicle impact performance each need their own test evidence. The Ultimate High Security Curtain Walling family holds the following, each applying to the configuration tested:

The weather results come from a BRE test report rather than a certification. The family also achieves U-values as low as 0.5. For the full detail, see our Ballistic Resistance and Blast Resistance guides and the Hostile Vehicle Mitigation range.

Where E10 Is Specified

E10 suits sites where the credible threat is a sophisticated, well-resourced attacker, and where a breach would have serious consequences for national security, public safety or critical services. Typical applications include:

• Critical national infrastructure
• Government buildings
• Embassies and high commissions
• Military and defence sites
• High-risk data centres
• Transport hubs and airports

The right rating comes from a security risk assessment that weighs the asset value, the likely capability of an attacker and the time a response needs to arrive. In critical infrastructure and government contexts, that assessment is typically informed by NPSA (National Protective Security Authority) guidance. Our technical team can review the assessment and recommend a rating for each opening.

Specifying an E10 Product: Checklist

• Confirm the certificate shows E10 under Issue 8 (both the letter and the number) and check the listing on Red Book Live
• Confirm the certified opening range for each elevation with our technical team before design freeze
• Use only the locking systems listed on the certificate; other locks do not carry the rating
• For Kraken 5 gates, specify automatic operation, allow for the 2.8 m minimum free-standing height and provide access control with at least 100,000 effective codes
• Plan an uninterrupted power supply for automatic gates and maglocks if the rating must hold during a mains failure
• Detail the fixings, foundations and substrate, as the connection to the structure sits outside the certificate
• For curtain walling, design the structural performance separately, as it is outside the scope of LPS 1175
• Where ballistic, blast or vehicle impact performance is also required, check that the evidence covers the exact configuration being specified
• Remember that resistance of access control systems to non-mechanical attack is outside the scope of LPS 1175

Frequently Asked Questions: LPS 1175 E10 and SR5

Related Premier Security Resources

• LPS 1175 Security Ratings Explained: the full SR1 to SR8 and A1 to H20 guide
• LPS 1175 D10 / SR4 Rating Guide: the rating below E10, for data centres, utilities and high-value sites
• LPS 1175 C5 / SR3 Rating Guide: for commercial premises, schools and retail
• Security Curtain Walling: Ultimate High Security Curtain Walling from C5 to E10
• Vehicle Access Sliding Gates: certified cantilever sliding gates
• Hostile Vehicle Mitigation: the full HVM range for vehicle borne threats
• Ballistic Resistance: EN 1522 FB and EN 1063 BR ratings explained
• Contact Premier Security: technical consultation and project enquiries