Steel boxes or steel cabinets shall be capable of withstanding a reasonable physical attack with hand-held tools and weapons, and equivalent to 6 mm mild steel strength. The box or cabinet should be built and finished in a workmanlike manner with negligible gaps between all fixed parts. Where it is proposed to construct cabinets or boxes of a single plate dimension measuring less than 6 mm mild steel or a variety of steel other than mild, consultation must take place with a registered engineer to confirm compliance with the performance-based criteria. A certificate of compliance from the registered engineer must be provided in these circumstances.
Two locking mechanisms of no less strength and security performance than a five lever mortise deadlock complying with BS3621:2004 or subsequent amendment shall be fitted to the cabinet door. Owing to the reduced size of a steel box designed solely for pistol storage together with the capability for concealment, only one locking mechanism is required. Any door handle fitted shall be designed to break off under leverage.
Drawings (reference C2191) can be obtained from an Arms Office. These give design and fixing recommendations.
One of which shall be the floor. Bolt shafts shall be a minimum of 10 mm in diameter and when bolted into concrete, expanding or chemical setting bolts may be used. Where the cabinet is bolted to a wooden floor it shall be through bolted to a steel plate which exceeds the floor area of the cabinet and is retained on at least two-floor joists. All nuts must be on the inside of the cabinet, and bolts welded or burred to resist removal. It is recommended that the cabinet or box be bolted in a confined space, such as a wardrobe or cupboard.