B&S Group manufacturers various enclosures from sheet steel. Most are destined for outdoor use and Prefabricated Buildings from B&S Grouprange from packaged sub-stations for wind farms to general outdoor storage and electrical buildings for various utility companies.

Security is always part of the specification whether it is just to protect from vandalism or prevent access. At B&S Group we manufacture and powder coat our enclosures ‘in-house’ with finishes to meet any specification including colour, marine and anti-vandal.

When designing and manufacturing any form of enclosure it is important to be aware of LPS 1175. LPS stands for Loss Prevention Standard and LPS 1175 details the requirements and testing procedures required for intruder resistant building components, strongpoints, security enclosures and free-standing barriers.

For any project, it is ideal to include a section on security in the specification and detail the level of threat and exposure time the enclosure is to withstand before intervention arrives. For the enclosure/building this should not only include walls, floor and roofs but also joints, hinges and fixings.

Not all enclosures and buildings have to be certified to LPS 1175. In order to do so requires expensive and length testing by trained BRE personnel. The test personnel are provided full knowledge on an enclosure’s specification and build method and so potentially have far more knowledge than any person or team who may try to gain entry in a field application. Under LPS 1175 security ratings run from SR1 to SR5 and include:

SR1: an opportunist attach by bodily force using minimum tools (e.g. screwdriver, knife, pliers etc). 10 minute maximum test time and 1 minute maximum use of tool time.

SR2: a more determined opportunist approach with tools of a higher mechanical advantage (e.g. SR1 tools plus bolt cutters, claw hammer, drill etc). 15 minute maximum test time and 3 minute maximum use of tool time.

SR3: a deliberate forced entry using bodily force and a section of attach options (e.g. SR2 tools plus short axe, chisel, crowbar, gas torch etc). 20 minute maximum test time and 5 minute maximum use of tool time.

SR4: experienced attempts at forced entry with higher tool levels (e.g. SR3 tools plus felling axe, sledgehammer, steel wedges, disc grinder, jigsaw etc). 30 minute maximum test time and 10 minute maximum use of tool time.

SR5: series attempts at forced entry with top end battery power tools as used by fire and rescue teams (e.g. SR4 tools plus circular saw and a 750W reciprocating saw with specialist blades). SR4 to SR5 is a massive step and requires resistance to state-of-the-art cutting tools. 30 minute maximum test time and 10 minute maximum use of tool time.

With so many buildings going modular and housing a range of equipment (including electrical switchgear and data centre IT) specifying a security rating is important.

When you think back to the Hatton Garden heist, it may take several days to make a hole big enough for a person to slip through (an elliptical shape measuring 400x225mm) when drilling concrete, but this can be quicker (with the right tools) when looking at sheet metal enclosures and especially so if the security level is low. If the building is housing critical data centre IT or switchgear, a high level of secure may well be required in the interests of safety and continuity of service.

B&S Group can supply enclosures and buildings to various security specifications, including blast and fire protection. For more information please contact our projects team.