Every workshop and warehouse eventually faces the same layout question: should storage stay put, or should it move with the work? Static storage — racking, shelving and fixed cupboards — gives you the most capacity per pound and per square metre. Mobile storage — workbenches, cabinets, trolleys and roll containers on castors — brings tools and materials to the job instead of walking the job to them. This guide sets out when each approach wins, and how to spec castor-mounted equipment properly.
What counts as mobile storage?
In an industrial setting, mobile storage usually means standard equipment mounted on braked, load-rated castors: mobile workbenches, rolling drawer cabinets, panel and maintenance trolleys, roll containers and mobile material racks. (Searches for “mobile shelving” sometimes mean roller-track compaction shelving that slides along floor rails to eliminate aisles — a designed, floor-fixed system we don't supply. This guide covers castor-mounted equipment, which solves a different problem.)
The case for static storage
Fixed racking and shelving should carry the bulk of what you store, for three reasons:
- Load capacity. A bolted shelving bay or pallet racking run carries far more than anything on wheels ever should. Once loads climb into the hundreds of kilograms per level, fixed uprights on a solid floor are the safe answer.
- Density. Static bays go higher and pack tighter. Wheels add height under the load and demand clear floor to manoeuvre, so a mobile unit always stores less per footprint.
- Cost per item stored. Boltless shelving is one of the cheapest ways to hold stock; castors, braked or otherwise, add cost to every unit.
If the contents rarely move and are picked where they sit — stockrooms, archives, bulk stock, spares — keep it static.
The case for putting storage on castors
Mobile storage earns its keep wherever the work moves and the same kit is needed in more than one place:
- Maintenance and assembly. A rolling cabinet takes the tools to the machine. The Bott Verso mobile cabinets run on 125mm castors — two of them braked swivels — with fully welded steel housings, lockable doors or central-locking full-extension drawers, and a worktop on top so the cabinet doubles as a workstation.
- Flexible workshop layouts. The Bott Cubio mobile framework bench is a height-adjustable workbench on 125mm braked swivel castors, so whole workstations can be repositioned as workflows change. GPC's mobile work benches offer steel or plywood tops with drawer and cupboard options.
- Distribution and picking. Roll containers are storage and transport in one — GPC's heavy-duty roll containers carry 75kg per shelf on two fixed and two swivel 100mm castors, loaded once and wheeled from stores to line to vehicle.
- Long and awkward stock. Some loads are safer moved with their rack than off it: GPC's mobile vertical sheet rack and heavy-duty mobile bar storage rack (three tiers on 200mm braked swivel castors) let one person reposition sheet and bar stock that would otherwise need two pairs of hands.
How to choose: five questions
- Does it move weekly or yearly? Daily or weekly movement justifies castors; annual rearrangement doesn't.
- How heavy is the loaded unit? Castor ratings are per castor, but the practical limit is what an operator can push and stop safely — keep loaded mobile units to a few hundred kilograms and put anything heavier on static shelving or move it with a truck or trolley.
- What's the floor like? Castors want smooth, level, debris-free floors. Rough or ramped routes need larger-diameter wheels — see our guide to choosing castors and wheels.
- Does it need to lock in place? Anything used as a work surface needs braked castors, applied before work starts — standard on the Bott mobile benches and cabinets we stock.
- Is security a factor? Mobile units can roll away as easily as they roll in. Lockable doors and drawers help, but high-value stock is better in a fixed, locked cupboard or cage.
Mixing the two: how most sites get it right
The best-run workshops treat this as a ratio, not a choice. Bulk and reserve stock sits on static racking and shelving; each workstation gets a fixed bench and cupboard; and a small fleet of mobile cabinets, trolleys and roll containers moves the day's work between them. Start static by default, and add wheels only where a unit demonstrably travels — every castor you don't need is money and floor space back.
Frequently asked questions
Is mobile storage covered by PUWER? Yes — castor-mounted equipment used at work falls under the Provision and Use of Work Equipment Regulations 1998, so it must be maintained (wheels, brakes and locks included) and suitable for the task and floor.
Do I need braked castors on everything? Any mobile unit that's worked on — benches, cabinet worktops, steps — needs brakes applied in use. Pure transport equipment such as roll containers is usually parked by position rather than brake, but on any slope, brakes are essential.
How much weight can a mobile cabinet hold? Check the manufacturer's rating for the unit, not just the castors. As a rule of thumb, if a loaded unit takes real effort to start or stop, it's too heavy to be on wheels — split the load or go static.
Can I retrofit castors to static shelving? No — shelving and racking uprights are designed to bear on a fixed floor. Buy equipment designed as mobile from the outset, with the frame bracing and castor ratings to match.
Browse our workshop storage range for mobile benches and cabinets, Bott for the Verso and Cubio mobile lines, and trucks & trolleys for roll containers and moving equipment. Not sure which way to go for a specific load? Get in touch and we'll talk it through.