Spacefile Mobile Shelving Systems

How a Spacefile mobile shelving system actually works

Static shelving spends most of its floor area on aisles. A row of shelving 24 inches deep usually needs a 36 to 42 inch aisle beside it just so somebody can stand there, and that aisle sits empty for almost the whole working day. A Spacefile mobile system removes that waste by mounting the shelving on wheeled carriages that travel on rails. The carriages park against each other, and the operator opens an aisle only where they are working. One shared aisle serves the whole bank instead of one aisle per row.

That single change is why the same room can hold substantially more material without adding a square foot of building. Spacefile’s own literature describes designs that increase storage up to four-fold compared with static shelf-and-aisle layouts. The honest version of that claim is that the gain depends on your room: a long, rectangular room with a clean slab and a tolerance for one open aisle gains far more than a short room that needs three aisles open at once for simultaneous pickers.

The three pieces that make up any Spacefile system are the rails and decking that sit on or in the floor, the carriage frames that roll on them, and the shelving or racking mounted on the carriages. Choose those three correctly and the system is quiet, light to move and easy to live with for decades. Choose them from a catalogue page without measuring the room, and you get a system that fights its users. That is the reason we survey before we quote.

Choosing between manual, mechanical and electrical assist

Nearly every Spacefile decision comes back to this one. It is not a question of budget alone; it is a question of how heavy the carriages will be, how often they move, and who moves them.

Manual assist (SDSm)

The user grips a handle and pushes the carriage sideways. Spacefile positions this for light and medium load applications and documents welded frame construction, large 5 inch solid steel wheels and permanently sealed, lubricated ball bearings for smooth, long-lasting operation. It suits shallow carriages, moderate loads and rooms where movement is occasional rather than constant. Because SDSm carriages share common tracks, Spacefile notes they can be installed or relocated without modification, which matters if you expect the room to change.

Mechanical assist (SDS)

A gear reduction and drive system converts a comfortable turn of a three-spoke handwheel into carriage travel. Spacefile documents ergonomic handwheels with revolving handles specifically so that heavily loaded carriages remain low-effort, and describes the system as able to move immense weights smoothly. Mechanical assist is the usual answer for deep carriages, dense paper records, parts, weapons cabinets and library-style shelving where several loaded carriages must move together.

Electrical assist (SDSe)

Powered movement is chosen when carriages are long or very heavy, when users cannot be relied on to apply force, or when the room is busy enough that speed matters. Spacefile documents systems up to 60 feet long, user-friendly controls, ADA compliant ramps for safe access, overhead scissor arms so power and communication wiring travels with the carriage, multiple safety features, and a controller that monitors current draw. Optional UPS battery backup is documented for power failures, which is worth specifying anywhere the stored material has to be retrievable during an outage.

• Weigh the real load, not the shelf rating — paper records and parts are usually heavier than people expect.
• Count how many aisles must be open at the same time; that number, not total volume, drives the layout.
• Decide who moves the carriages. If the answer includes occasional or untrained users, bias toward mechanical or powered assist.
• Check the power path early for SDSe: routing power to a moving carriage is a design decision, not an afterthought.
• Confirm ramp type and depth if the rails cannot be recessed, because ramps consume usable floor length.

What can be mounted on the carriages

A carriage is a moving platform. The shelving on top of it is chosen for the item being stored, which is why the same Spacefile drive can serve a records room, a parts crib and an evidence room. Spacefile documents SDS mechanical systems as designed to move:

• LT 4-Post shelving for boxes, binders and general storage
• S-Line industrial shelving for heavier parts and maintenance stores
• Cantilever shelving for long or awkward items that will not sit inside a four-post bay
• ThinLine tier shelving where shelf pitch matters more than shelf depth
• Weapons storage for armouries and evidence rooms
• Third-party shelving and custom storage modules, subject to review of the existing uprights

End panels are not just cosmetic. Spacefile documents a diverse selection of end panels that can be integrated with any of its systems, and in practice they do three jobs: they finish the bank so it looks like part of the building, they provide the mounting point for the drive and handle, and they can carry locking hardware. Spacefile documents a diverse selection of lockable configurations available to meet virtually any security criteria, which is the starting point for a controlled-access room. Exactly which locking arrangement satisfies your policy is a decision for your security lead, working from the options we confirm for your configuration.

Planning the room: the arithmetic we actually use

You can sanity-check a high-density project on the back of an envelope before anyone quotes it. The arithmetic below is definitional, not a performance claim, and it deliberately stops short of the numbers that require engineering.

Step one: count what static shelving gives you today. Multiply the number of rows by the number of shelf levels per row by the usable width of a shelf. That gives linear shelf feet. Then measure how much of the room is aisle. In a typical static layout with an aisle beside every row, roughly half of the room area is walkway.

Step two: model the mobile layout. Along the direction of travel, a mobile bank consumes the combined depth of all carriages, plus the open aisles you insist on, plus the rail run-out and ramp at the access end. If you can live with one open aisle instead of one aisle per row, the aisles you delete become carriages. That is the whole mechanism, and it is why long rooms outperform square ones.

• Long, rectangular rooms gain the most; short, square rooms gain the least
• Every aisle you keep permanently open costs roughly one carriage of capacity
• Rail run-out and the ramp at the access end are real length, not rounding

Step three: subtract the constraints before celebrating. Sprinkler heads, lighting, structural columns, doors that swing into the bank, HVAC diffusers and the reach height of your shortest user all remove capacity from the theoretical maximum. So does the workflow: two people who must pick simultaneously need two aisles, and that costs a carriage.

Where Spacefile fits in the lines we represent

Spacefile is one of several high-density manufacturers we design with. Keeping the brands on separate pages is deliberate: the model names, drive mechanisms, track options and lead times are genuinely different, and blending them into one page helps nobody.

If you are still deciding whether high density is the right approach at all, the mobile shelving hub compares the movable-aisle approach with the alternatives, and the high-density shelving page covers the space arithmetic in more depth. Federal buyers can review our Spacefile GSA contract details before raising an order.