LPS 1175 SR2 (B3) Security Doors – Forced Entry & Ballistic Protection
Premier Security Ballistic & Blast Ltd manufactures security door systems certified to LPS 1175 Issue 8 SR2 (B3) for certified resistance to forced entry attacks. Available in swing and sliding configurations with optional ballistic protection up to FB4, our SR2 doors are independently tested by BRE and LPCB-listed for retail, commercial, residential and critical infrastructure applications.
What is an SR2 (B3) Security Door?
An LPS 1175 SR2 (B3) security door is engineered to resist forced entry attacks using hand tools and crowbars for up to 3 minutes. The SR2 (B3) rating is the second-highest forced entry resistance level within the LPS 1175 standard and is appropriate for retail, commercial premises, residential properties, warehouses and utility buildings where a significant intruder threat has been assessed.
The rating comprises two components: SR2 refers to the tool categories and attack duration, while B3 (equivalent to the older DAS 1–6:2010 notation) indicates the resistance class. Both components must be stated when specifying an LPS 1175 security door.
Key point: An LPS 1175 SR2 door resists forced entry, not necessarily ballistic attack. If ballistic protection (bullet resistance) is also required, the door must carry separate EN 1522/1523 ballistic certification. Many Premier SR2 doors are dual-certified with ballistic ratings, but the two certifications are separate and independent.
Key Features of SR2 (B3) Security Doors
Independently tested and certified for resistance to forced entry attacks by LPCB-accredited laboratories.
Reinforced locking systems with concealed shoot bolts and anti-snap cylinders rated to SR2 specification.
Robust steel or composite frames and infill designed to withstand sustained tool attack and ram-raid impact.
Available as swing doors, sliding doors, double doors and custom configurations to suit project requirements.
Integrate ballistic glazing and FR4 reinforcement for combined forced entry and bullet resistant protection.
Weatherproof seals, thermal breaks and drainage channels for longevity and performance in external exposure.
Designed to integrate seamlessly into retail, residential and commercial facades without heavy security aesthetics.
Compatible with electric locks, keypads, card readers and automation systems compliant with LPS 1175.
LPS 1175 Issue 8: The Standard
LPS 1175 Issue 8 is the Loss Prevention Standard published by the LPCB (Loss Prevention Certification Board), a UK authority that independently assesses security products against defined attack scenarios. It is the industry standard for forced entry resistance in the UK and is recognised by insurers, main contractors, specifiers and government security procurement teams.
Understanding the SR2 (B3) Rating
LPS 1175 Issue 8 defines security rating (SR) levels from SR1 to SR8. SR2 falls in the mid-to-upper range and is defined by:
| Rating | Attack Duration | Tool Categories | Typical Application |
|---|---|---|---|
| SR1 | Up to 1 minute | Category 1 & 2 | Low-threat retail, standard residential |
| SR2 (B3) | Up to 3 minutes | Category 1, 2, 3 & 4 | Commercial, retail, warehouses, mid-threat residential |
| SR3 (C5) | Up to 5 minutes | Category 1–5 | High-risk retail, critical infrastructure, secure facilities |
| SR4 | Up to 10 minutes | All tool categories | Highest-threat sites, secure compounds |
The B3 notation refers to the previous DAS 1–6:2010 classification system and is now expressed as SR2 in Issue 8. Both terms are still used interchangeably in specification and compliance documentation.
Tool Categories
LPS 1175 SR2 resistance applies against the following tool categories:
- Category 1: Prying tools (screwdrivers, crowbars, pry bars)
- Category 2: Drilling tools (hand drill, power drill, rotary drill)
- Category 3: Sawing tools (hand saw, power saw)
- Category 4: Cutting tools (bolt cutters, angle grinder)
SR2 must resist all four categories for the full 3-minute test duration. This is why SR2 doors are significantly more robust than SR1 products.
Technical Specifications
Certification: LPS 1175 Issue 8 SR2 (B3) locking and assembly classification
Construction: Steel frames with composite infill, steel sheet facings or laminated/security glazing options
Locking System: Multi-point SR2-rated locking with concealed shoot bolts, anti-snap cylinders and reinforced strike plates
Frame Material: 3 mm minimum steel plate welded and through-bolted for maximum rigidity; composite or aluminium reinforcement available
Doors Styles: Swing (single or double leaf), sliding (single or double track), pocket or pocket-sliding configurations
Max Leaf Width: Up to 1200 mm per leaf; custom widths available (impact on lead time)
Max Leaf Height: Up to 3000 mm, suitable for shopfronts, industrial and high-ceiling applications
Glazing Options: Laminated safety glass, toughened glass, security film laminate, ballistic glazing (FB2 to FB4 with separate certification)
Hardware: Heavy-duty stainless steel hinges, handles and fixings rated for continuous-use environments
Seals & Drainage: Weatherproof gaskets, drain channels and threshold options for external installations and low-water-ingress requirements
Finish Options: Powder coat to RAL colour, anodised aluminium, stainless steel, timber cladding or bespoke finishes
Thermal Performance: U-values from 1.2 W/m²K (unglazed) to 2.0 W/m²K (with security glazing); thermal breaks available
Access Control: Compatible with electric locks, maglocks, keypads, card readers and motorised operators; safety sensors certified for LPS 1175
Fire Rating (Optional): Doors can be specified with fire integrity ratings up to EI 60 for dual LPS 1175 & EN 1634-1 compliance
Ballistic Rating (Optional): Dual certification available combining LPS 1175 SR2 forced entry resistance with EN 1522/1523 ballistic protection up to FB4 (and BR4 glazing)
Why Specify SR2 (B3) Security Doors
- Proven resistance to forced entry attacks using hand tools, saws and power tools, tested to an independent UK standard
- Significantly reduces loss from theft and vandalism in high-risk retail and commercial environments
- Insurance recognition – many insurers offer reduced premiums for LPS 1175 SR2-certified perimeter protection
- Minimal visual security impact – SR2 doors can be specified with glazing and finishes that integrate into most architectural styles
- Flexible configuration – available in swing, sliding, double-leaf and pocket formats to suit any entrance requirement
- Optional ballistic upgrade – combine SR2 forced entry resistance with bullet resistance in a single tested assembly
- LPCB certification – full traceability from raw material testing through assembly and dispatch, with Red Book listing
- Independent verification – third-party accredited testing by BRE and other LPCB-approved laboratories
Where SR2 (B3) Doors Are Specified
| Sector | Typical Threat | Common Configurations |
|---|---|---|
| Retail & Hospitality | Opportunistic break-in, ram-raid, cash-in-transit protection | Swing and sliding shopfront doors; back-of-house access; after-hours shutters |
| Residential | Burglary, forced entry to high-value properties | Front doors, rear patio doors, garage entry with glazing and contemporary finishes |
| Commercial & Industrial | Intruder access to plant, equipment and storage | Swing and sliding warehouse doors, personnel entry, tool crib access with automation |
| Financial Services | Theft, robbery, ATM room security | Reinforced vault doors, secure entry vestibules, cash handling areas |
| Healthcare & Education | Access control, staff and asset security, safeguarding | Pharmacy access, secure storage, controlled access to sensitive areas |
| Critical Infrastructure | Unauthorised access, asset protection, perimeter security | Utility buildings, communications hubs, government facilities |
Installation, Commissioning & Maintenance
Installation
SR2 doors must be installed by experienced security door technicians to preserve LPS 1175 certification. The frame-to-structure interface is critical – poor fixing can compromise the entire assembly. Premier provides detailed installation drawings and on-site support to ensure the certified performance is maintained from frame receipt through to handover.
Typical installation includes:
- Structural penetration and frame fixing to building elements (masonry, steelwork or concrete)
- Threshold integration and damp-proof course management
- Locking and hardware commissioning, including cylinder change and key registration
- Access control and automation testing if fitted
- Seals and drainage commissioning for weather performance
Maintenance Schedule
To maintain LPS 1175 certification and performance, the following maintenance regime is recommended:
- Quarterly: Visual inspection of frame, hinges, locks and seals for damage or wear
- Bi-annual: Lubrication of locking mechanisms, hinges and sliding hardware
- Annual: Full service of all locks, including cylinder inspection and re-keying if required
- As required: Repair or replacement of any component showing damage from attack or weather exposure
Frame-to-wall junction: LPS 1175 testing does not include the connection between the product frame and the building structure. This interface is the installer's responsibility and must be detailed separately by the specifier. Premier provides installation detailing and on-site support to maintain certified performance at this critical junction.
Combining LPS 1175 SR2 with Ballistic Protection
Premier manufactures SR2 doors that also carry separate EN 1522/1523 ballistic certification, combining forced entry resistance with bullet resistance in a single tested assembly. These products carry two independent certificates: one for LPS 1175 SR2 and a second for ballistic protection (FB2 to FB4, with BR2 to BR4 glazing).
Important: The two ratings are independent certifications to different standards. A door rated SR2 and FB3 means it has passed separate test regimes for each threat. Each certificate must be stated and verified independently. Do not assume SR2 doors are ballistic-rated unless explicitly certified.
Dual-rated configurations are common in:
- High-value retail where both forced entry and firearms threats have been assessed
- Financial services and cash-handling facilities
- Government and critical infrastructure buildings
- Secure residential properties in high-threat urban locations
Ordering, Lead Times & Custom Options
Premier manufactures SR2 doors to bespoke specification. Typical variables include:
- Door configuration (swing, sliding, double-leaf, pocket-sliding)
- Leaf size (within certified dimensions)
- Glazing type and extent (fully glazed, part-glazed, solid)
- Hardware finishes (stainless steel, powder coat, anodised)
- Access control integration (electric locks, maglocks, keypads)
- Optional ballistic upgrade (FB2 to FB4 with separate testing)
- Optional fire-rating (EI 60 with separate EN 1634-1 certification)
- Thermal and weather performance upgrades
Typical lead time: 8–14 weeks from order to delivery, depending on configuration and any ballistic or fire testing required.
Quotation: Contact the Premier Security sales team for a site survey, specification review and competitive quotation. We work with architects, main contractors, security consultants and end-users from early design stages through to handover.
Request a Specification Review for SR2 Doors
Premier's specification team can assess your threat profile, recommend the right SR2 configuration for each entrance, and provide independent certification documentation for your project file.
Contact our Specification TeamWarranty, Certification & Support
All Premier SR2 doors are supplied with:
- Full manufacturer warranty covering defects in materials and workmanship for 12 months from completion
- LPS 1175 Issue 8 SR2 test certificate and LPCB Red Book listing confirmation
- Installation drawing set and commissioning guidance
- Maintenance and service guidance booklet
- Optional on-site commissioning certificate confirming installation compliance
Extended warranty and maintenance packages are available to suit long-term asset protection requirements.
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Frequently Asked Questions
What exactly does LPS 1175 SR2 (B3) mean?
LPS 1175 is a UK Loss Prevention Standard for resistance to forced entry attacks. SR2 refers to the security rating level and specifies the tool categories and attack duration (up to 3 minutes). B3 is the equivalent older notation (now called SR2 in Issue 8). Both terms are used interchangeably and mean the same thing: certified resistance to forced entry with hand tools, saws and power tools for a 3-minute test period.
Is an SR2 door bullet resistant?
Not unless it carries a separate EN 1522/1523 ballistic certificate. SR2 certification is for forced entry resistance only. Many Premier SR2 doors can be upgraded with ballistic glazing and reinforcement to carry a separate ballistic rating (FB2 to FB4), but this is an additional specification and testing. Always confirm both the LPS 1175 and ballistic certificates if bullet resistance is required.
Can SR2 doors be automated?
Yes. SR2 doors can be specified with electric locks, maglocks and motorised operators provided they are certified for LPS 1175 compliance. Safety sensors, push-to-exit buttons and access control integration are all possible while maintaining the security rating. Automation must be specified as part of the initial order to ensure compliance.
What is the difference between SR2 and SR3?
SR3 (also written as C5) requires the door to resist attack for 5 minutes (not 3) and includes additional tool categories and more severe attack scenarios. SR3 is the next level up and is typically specified for higher-threat retail or critical infrastructure. SR2 is suitable for most commercial, retail and residential applications where a moderate threat has been assessed.
Are Premier's SR2 doors independently tested?
Yes. All Premier SR2 doors are independently tested by BRE and other LPCB-accredited laboratories and are Red Book listed. Full test certificates are available on request and are included with every product. This is why specifiers, insurers and government procurement teams trust the LPS 1175 standard.
What glazing options are available?
Options include laminated safety glass, toughened glass, security film laminate, polycarbonate infill and ballistic glazing. Glazed SR2 doors maintain the security rating provided the glazing is properly framed and fixed. Part-glazed and fully-glazed configurations are available, with glazing extent determined by your specification requirements.
Can an SR2 door also be fire-rated?
Yes. Premier manufactures doors that carry both LPS 1175 SR2 and EN 1634-1 fire integrity certification (up to EI 60). These require separate testing and certification for each threat. If fire rating is required, it must be specified at order time.
What is the typical lead time for an SR2 door?
Typical lead time is 8–14 weeks from order to delivery, depending on the configuration and whether ballistic or fire testing is required. Custom sizes and finishes may extend the lead time. Contact us for a specific lead time quotation once your specification is confirmed.
Protect Your Premises with Premier SR2 Security Doors
Independent LPS 1175 Issue 8 SR2 (B3) certification. Available in swing and sliding formats with optional ballistic protection. Suitable for retail, commercial, residential and critical infrastructure applications. Full installation support and warranty included.
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