LPS 1175 SR2 and B3 Security Rating: Certified Doorsets, Screens and Gates

LPS 1175 SR2, written as B3 under Issue 8 of the standard, is one of the most widely specified forced entry ratings for communal entrances, residential developments and low-risk commercial buildings. It certifies that a complete door, screen or gate has resisted a determined opportunist using Category B tools for at least three minutes. Premier Security Ballistic & Blast Ltd manufactures LPCB certified SR2 doorsets, screens and pedestrian gates, and B3 rated hinged and sliding vehicle gates, all listed on LPCB Red Book Live.

What Does LPS 1175 SR2 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 rating describes two things: the tools the attacker is allowed to use and the minimum time the product must hold out against them.

At SR2 (B3), the test team attacks the locked product with Category B tools and must not create a 400 mm x 225 mm opening, the minimum size a person can climb through, within three minutes of working time. The attack can target any part of the assembly, including the leaf, frame, glazing, hinges, locks and threshold, so the whole product has to perform, not just the door leaf.

The Category B tool set

Category B represents a determined opportunist who is prepared to make some noise. The test kit includes everything in Category A plus tools with more mechanical advantage:

• Category A tools: screwdrivers, pliers, knives, small spanners, fishing line and traction screws
• Added at Category B: bolt cutters, a claw hammer (up to 1 kg), a cordless drill, steel tube and shears

That profile reflects common attacks on communal and commercial entrances: forcing a door with leverage, cutting at a lock or hinge, or drilling out a cylinder. An SR2 product has been tested against those methods as a complete, locked assembly.

SR2 vs B3: Issue 7 and Issue 8 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 two-part classification: a tool category letter (A to H) followed by a minimum delay in minutes (1, 3, 5, 10, 15 or 20). That is why the same threat level appears as SR2 in older documents and B3 in newer ones.

Both ratings describe a Category B attacker held off for at least three minutes, which is why specifications often write "SR2 / B3" and treat them as comparable. The difference is the issue of the standard the product was tested under. A certificate states one or the other: an Issue 7 certificate shows Security Rating 2, and an Issue 8 certificate shows B3. A product certified under Issue 7 would need testing under Issue 8 to carry a B3 rating.

Premier Security's SR2 and B3 Certified Products

Premier Security holds LPCB certification for the following products at SR2 or B3. Sizes are the certified structural openings shown on each certificate. Bespoke sizes outside these ranges are not covered by the rating, so our technical team will confirm the certified configuration for every opening.

SR2 With Fire Resistance or LPS 2081

Where SR2 / B3 Is Specified

SR2 suits buildings where the credible threat is a determined opportunist rather than a planned, well-equipped attack. Typical openings include:

• Communal entrance doors
• Housing association and local authority blocks
• Refuse, cycle and plant room doors
• Residential perimeter gates
• Car park and service yard gates
• Low-risk commercial premises

SR2 is widely used on Secured by Design developments. The current Secured by Design guide for the development type, or the local Designing Out Crime Officer, sets the minimum standard for each opening, so check the requirement early in the design. Premier Security holds Secured by Design accreditation and can supply the documentation for planning submissions.

Specifying an SR2 or B3 Product: Checklist

• Confirm the rating and issue on the LPCB certificate (Security Rating 2 under Issue 7, or B3 under Issue 8) and check the listing on Red Book Live
• Check the opening size falls within the certified structural opening for the chosen configuration
• Use only the locking systems listed on the certificate; other locks do not carry the rating
• Confirm the infill (glazing, steel or polycarbonate) is within the certified options for that product
• Detail the fixings and substrate, as the frame to wall connection sits outside the certificate
• Remember that resistance of access control systems to non-mechanical attack is outside the scope of LPS 1175
• For maglocked doors and gates, plan an uninterrupted power supply if the rating must hold during a mains failure

Frequently Asked Questions: LPS 1175 SR2 and B3

Related Premier Security Resources

• LPS 1175 Security Ratings Explained: the full SR1 to SR8 and A1 to H20 guide
• SR2 Security Doors: Premier's LPS 1175 SR2 doorset range
• Security Gates: LPS 1175 certified gates from B3 (SR2) to E10 (SR5)
• Vehicle Access Sliding Gates: certified cantilever sliding gates
• Thermally Broken Doors: SR2 and LPS 2081 Rating B with thermally broken profiles
• Fire Rated Doors: LPS 1056 and dual certified fire and security doorsets
• LPS 2081 Swing Security Doors: Security Rating B stealth intrusion doorsets
• Contact Premier Security: technical consultation and project enquiries