Security Mesh Cages — Protecting High-Value Stock and Equipment

What Are Security Mesh Cages Used For?

Security mesh cages are fully enclosed steel wire mesh structures — walls, door and (usually) a roof panel — used to protect high-value stock, tools, IT and AV equipment, controlled substances and sensitive materials from unauthorised access. They are widely used in warehouses and distribution centres for bonded or duty-suspended goods, in NHS pharmacy departments and community pharmacies for controlled drug storage, in police and legal environments for evidence stores, in data centres for meet-me rooms and cable ladder protection, and in manufacturing facilities to secure calibrated tooling, spare parts and consumables. Unlike locked cupboards or standard shelving, a cage encloses a full working volume rather than a small item, so it can house a pallet, a shelving bay, a workstation or an entire small room. The open mesh construction gives visible deterrence — anyone approaching can see the cage is locked and can be seen themselves — while airflow, lighting and overhead sprinkler coverage continue through the mesh into the enclosed space.

Construction and Security Grades

Rackstor UK Ltd security cages are built from welded steel wire mesh framed in rolled steel angle or tubular section. Standard-duty cages typically use 3 mm wire on a 50 × 50 mm or 50 × 100 mm aperture and are appropriate for tool stores, IT cages and general stock protection where the primary risk is casual or opportunistic access. Higher-security cages step up to 4 mm or 5 mm wire, with closer post centres, reinforced corner posts and heavier door frames to resist deliberate attack. On the frame side, corner posts can be specified in RHS (rectangular hollow section) rather than angle for extra rigidity, and floor fixings can be upgraded to tamper-resistant anchor bolts with the heads inside the cage. The mesh is finished either hot-dip galvanised for maximum corrosion resistance, or polyester powder coated over a galvanised or primed substrate for a colour finish that matches the surrounding building.

Doors and Locking

Because the door is almost always the weakest point of any enclosure, cage doors are engineered as a specific assembly rather than an afterthought. Hinges are welded and typically fitted with a security pin or hinge bolt so the door cannot be lifted off if the pins were driven out. Frames are reinforced around the lock position. Locking options include: a heavy-duty hasp and staple for a padlock (simple, cheap, easy to key alike across multiple cages); a mortice deadlock in a boxed strike (fixed key management, cleaner appearance); a euro-cylinder lock which can be integrated into an existing site master-key suite; and electronic access control via a proximity or fob reader, wired back to the site access control system so entries and exits are logged. For double-door openings, the passive leaf is normally secured with drop bolts top and bottom into the frame and floor, and only the active leaf carries the lock.

Roofs, Heights and Coverage

A cage is only as secure as its weakest surface. Where the surrounding structure is a warehouse with several metres of clear height overhead, the cage must have its own roof — otherwise the enclosure can simply be climbed over from adjacent racking or a mezzanine edge. Standard cage heights are 2.1 m, 2.4 m and 3.0 m; taller cages are built to order. Roof panels are supplied in the same mesh as the walls, so airflow and sprinkler coverage are preserved. Where a cage is built up to the underside of a low ceiling, the top of the cage can be tied into the soffit to close the gap. Floors are normally the existing concrete slab; suspended floors within a cage are unusual but can be specified where the cage sits above a service void.

Pharmaceutical and Controlled-Drug Caging

NHS pharmacies, community pharmacies, GP surgeries and private healthcare facilities are required to store controlled drugs and certain other medicines in accordance with the Misuse of Drugs (Safe Custody) Regulations 1973 and associated guidance. For bulk storage that exceeds the capacity of a standard controlled-drug cabinet, a compliant mesh cage forms the outer secure store within which the CD cabinet or wider stock is kept. Rackstor UK Ltd designs pharmaceutical caging to work alongside the specific procedures of the site — including access rules, single-person entry, and integration with CCTV or intruder alarm. Cages are built to the specific room dimensions and installed with minimal disruption to dispensing activity.

Insurance and Loss Prevention

Many commercial insurance policies stipulate specific storage arrangements for high-value stock, and failure to meet those conditions can invalidate a claim. Common conditions include: storage of items above a certain value in a locked and enclosed compound rather than open racking; separation of stock from staff and visitor areas; and use of a CCTV-covered access point. A mesh cage typically satisfies these requirements at a fraction of the cost of a bricks-and-mortar strong room, and the visible steel construction is often accepted by underwriters as a demonstrable loss-prevention measure. If your insurance broker has set specific requirements — for example a minimum wire gauge or a particular lock standard — share them at survey stage and the cage will be specified to match.

Free Survey and Quotation

Rackstor UK Ltd provides free security cage surveys and fixed-price quotations nationwide. Call 0800 654 6955 or use the enquiry form.

Frequently Asked Questions