If you have shopped for garage shelving, you have seen a big number on the listing — 800kg, 1200kg — and probably wondered whether a single shelf can really take that much. Almost always, it cannot. That headline figure is the total capacity of the whole unit, not what one shelf can safely hold. Getting this wrong is how people end up with a sagging shelf, a collapsed corner, or a toolbox on the floor. This guide explains the difference in plain terms, using the real per-shelf ratings we publish, so you can load your garage with confidence.
The headline number is the total, not the per-shelf limit
Here is the honest maths. Our garage shelving comes with four shelves per bay. A unit labelled "800kg" is rated at 200kg per shelf, and 200kg × 4 shelves = 800kg total. A unit labelled "1200kg" is rated at 300kg per shelf, and 300kg × 4 = 1200kg. So the big number on the box is simply every shelf added together — it is never the load one shelf can carry on its own. If you tried to stack 800kg onto a single shelf of an 800kg unit, you would be overloading that shelf four times over. Always read the spec line that says "per shelf", not the model name.
What 200kg and 300kg per shelf actually mean at Steel Power
We keep our capacity claims deliberately simple and honest, with two per-shelf ratings across the range:
- Light-duty — 200kg per shelf (evenly distributed). This covers our compact 0.5m-deep bays, such as the Garage Shelving 1.8m(H) x 1.5m(L) x 0.5m(D) 800kg and the 1.8m(H) x 2.0m(L) x 0.5m(D) 800kg. Plenty for boxes, camping gear, pantry overflow, sporting equipment and general household storage.
- Heavy-duty — 300kg per shelf (evenly distributed). This covers our deeper 0.6m bays, such as the Garage Shelving 2.0m(H) x 2.0m(L) x 0.6m(D) 1200kg and the taller 2.4m(H) x 2.0m(L) x 0.6m(D) 1200kg. Suited to tools, paint tins, workshop stock, auto parts and heavier crates.
Both are adjustable steel shelving with a powder-coated finish, four shelves per bay, and a 1 year warranty. We do not quote inflated per-shelf figures, and we do not sell pallet racking — these units are built for garages, sheds and small workshops, not forklift loads.
Why "evenly distributed" is the catch most people miss
Every per-shelf rating we publish assumes the weight is spread evenly across the shelf. That qualifier matters more than most buyers realise. A 300kg shelf will happily carry 300kg spread over its full 2.0m width, but concentrate that same 300kg into one 30cm patch in the middle and you create a point load the shelf was never rated for. The steel can flex, the shelf panel can bow, and the failure point arrives well below the number on the spec sheet.
The practical rule: put heavy items low and spread them out, keep the load away from a single edge or corner, and never let one dense object (an engine block, a full toolbox, a tub of tiles) sit as a single concentrated mass. If in doubt, treat the per-shelf number as a distributed limit, then give yourself a comfortable margin below it.
Matching the right unit to what you are storing
Work backwards from your heaviest shelf, not the total. Ask what the single most loaded shelf will hold, then choose a rating above it:
- Boxes, seasonal gear, light household clutter: a 200kg-per-shelf light-duty bay is usually plenty. A typical archive box of paper is 15–20kg, so even a well-packed shelf sits comfortably inside the limit.
- Tools, workshop consumables, paint, auto parts: step up to a 300kg-per-shelf heavy-duty bay with 0.6m depth for the extra room and headroom on capacity.
- Deep or bulky items: choose the 0.6m depth over 0.5m so the load sits fully supported on the shelf rather than overhanging the front edge.
- Low ceilings or a mezzanine: pick the 1.8m height; for a standard garage the 2.0m or 2.4m gives more vertical storage without changing the per-shelf rating.
Shelf heights are adjustable, so you can set taller gaps for bulky items on one shelf and tighter spacing for small boxes on another — without affecting the 200kg or 300kg per-shelf figure.
An honest word on how our numbers compare
Plenty of retail shelving from the big chains — Bunnings, Kmart, Officeworks, Stratco — is rated lower per shelf than ours, and some competitor listings lean on the eye-catching total rather than the per-shelf figure (check their own product pages for the exact ratings, as advertised). We would rather you compared like for like: our 200kg and 300kg per-shelf ratings are genuine distributed limits for a sturdier mid-range steel unit. We make no structural certification claims — for home and light workshop use you generally do not need one — and we would rather under-promise on paper than have a shelf let you down in the garage.
One practical note: we run our own warehouse in Willawong, Brisbane, so Brisbane locals can arrange same-day pickup. Orders to Melbourne, Sydney and other cities are delivered rather than collected. ABN 25 655 838 734.
Frequently Asked Questions
Does "1200kg" mean one shelf holds 1200kg?
No. 1200kg is the total for the whole four-shelf unit. Each shelf is rated at 300kg evenly distributed, and 300kg × 4 shelves = 1200kg. Always load to the per-shelf figure, never the headline total.
How much can one Steel Power shelf actually hold?
Either 200kg or 300kg per shelf, evenly distributed, depending on the model. Our light-duty 0.5m-deep bays are rated at 200kg per shelf; our heavy-duty 0.6m-deep bays are rated at 300kg per shelf. Both figures assume the weight is spread across the shelf.
What does "evenly distributed" mean, and why does it matter?
It means the rating assumes weight spread across the full shelf, not piled in one spot. A 300kg shelf can bow or fail below its rating if you concentrate that load into a small central patch, so spread heavy items out and keep them off a single edge.
What happens if I overload a shelf?
The shelf panel bows, the steel can take a permanent set, and in the worst case the shelf gives way. Overloading also voids the warranty. Stay under the per-shelf rating, put heavy items on lower shelves, and distribute the weight.
Do I need a certified or engineered rack for my garage?
For typical home and light workshop storage, generally no. Certified engineered racking is aimed at pallet loads and commercial forklift environments. Our garage units are honest 200kg or 300kg per-shelf steel shelving sized for boxes, tools and household gear, not pallet racking.
Can I pick up in Brisbane or is everything delivered?
Brisbane customers can arrange same-day pickup from our own warehouse in Willawong. If you are in Melbourne, Sydney or elsewhere, your order is delivered rather than collected, as we only hold stock at the Brisbane site.
The takeaway
Read the per-shelf number, not the model name. With Steel Power that number is a straight 200kg or 300kg per shelf, evenly distributed — no inflated totals, no certification claims we cannot back, just honest steel shelving sized for a real Australian garage. Spread the load, keep the heavy gear low, and your shelving will do its job for years.
By Craig Dunstan, Brisbane