Industrial Steel Shelving — Open & Closed Steel Shelving Units
All-welded and bolted steel shelving for parts rooms, stockrooms, tool cribs and archive storage — 39"H and 75"H units, 12", 18" and 24" deep shelves, up to 400 lb per shelf, open or fully closed. We size the run, quote the units and accessories, and coordinate delivery and installation.
400 lb
load capacity per shelf, uniformly distributed
22 ga
all-welded steel shelf construction
39"/75"
standard unit heights, 4 to 8 shelf levels
720+
steel and solid shelving SKUs we supply
Steel shelving is still the cheapest square foot of organized storage you can buy
Steel shelving is the workhorse of every stockroom, parts department, maintenance store and records room in North America, and it has stayed that way for one reason: nothing else stores hand-stacked cartons, bins, trays and loose parts at a lower cost per usable cubic foot while surviving twenty years of daily abuse. A steel shelving unit is a set of formed steel shelves carried on four corner posts or welded frames, adjustable in height, open on all four sides or closed in with solid back and side panels. It does not need a forklift, it does not need a permit for a normal single-level installation, and it can be reconfigured by a maintenance tech with a wrench.
Shelf capacity is a per-shelf number measured under a uniformly distributed load, and it is the single figure most steel shelving quotes get wrong. Material Handling USA supplies steel shelving as a supplier and project partner to the full Quantum Storage Systems line and several other North American shelving manufacturers, which means we are not locked into one catalog when your openings, depths or capacities do not fit. We specify the unit, the shelf count, the accessories and the bin fit against your real parts profile, quote it as a complete run rather than a pile of part numbers, and coordinate delivery and installation. Browse the stocked range in our steel shelving category, or work through the sections below in the order we use when we quote.
What this page covers — and what it does not
Open and closed steel shelving units, unit sizes and shelf counts, 22 gauge all-welded construction, per-shelf load capacity and how to plan it, accessories (dividers, panels, drawer modules, security enclosures, decking), steel shelving supplied complete with plastic bins, application-by-application guidance, and the way we specify and quote a run. Boltless and rivet shelving are a different product family with different economics — see our boltless shelving section for that. No pricing is published here: steel pricing moves with mill costs and freight, so we quote live.
- Adjustable shelf levels so openings match your carton, tote or bin heights.
- Open or closed — closed panels keep dust off stock and stop items pushing through.
- Up to 400 lb per shelf on the 22 gauge all-welded units we stock most heavily.
- Starter and add-on bays that share posts, so a long run costs less per foot.
- Accepts plastic bins, dividers, drawers and decking instead of being replaced.
- Repairable and reconfigurable — individual shelves and panels are replaceable parts.
Six steel shelving builds, and when each one is the right answer
Most of the shelving questions we get are really one question: which build. The units below all store the same kinds of goods, but they differ in how the stock is protected, how the shelf face is used, and how much handling the unit is expected to absorb. Pick the build first, then size it.
Open Steel Shelving UnitsThe default. Four-post units with adjustable 22 gauge all-welded shelves, open on all sides for two-way picking and maximum light. 39"H and 75"H, 4 to 8 shelf levels, up to 400 lb per shelf.
Closed Steel Shelving UnitsDust-free and contained. Same shelves, plus solid back and side panels so stock cannot be pushed through to the next aisle and airborne dust stays off it. Ideal against walls and in dirty plant environments.
Steel Shelving With Bins (Complete Packages)Small parts, shipped as one unit. Galvanised steel units supplied complete with giant open-hopper bins — 12"D and 18"D packages, 5 to 10 shelves, bins in one color per unit. Windows and dividers optional.
Closed Bin Shelving UnitsBin storage that stays clean. Closed-back steel units pre-loaded with shelf bins or hopper bins for parts rooms where dust, draughts or cross-aisle spill are a problem. Sized in our bin shelving section.
Enclosed & Secured BaysControlled stock inside an open run. Individual bays closed in with solid or mesh panels and lockable doors, so consumables stay open-access while high-value or regulated items are locked, without a separate cabinet.
Wide-Span & Decked Shelving for BulkWhen cartons get big. Wider bays with wood or wire decking carry bulky, awkward and hand-stacked bulk items that a 36" steel shelf cannot span. This is boltless territory — we quote it from the boltless range.Open vs closed steel shelving: the decision in one table
Open and closed units use the same shelves, the same posts and the same capacities. What changes is the panelling, the ship weight and the price per bay. A closed 75"H unit with 18" deep shelves ships around 47 lb heavier than the equivalent open unit — that steel is the back and side panels, and it is doing real work in the right environment. Choosing the wrong one is a common and expensive mistake: closed panels in a two-sided pick aisle waste money and block access, while open units against a plant wall let dust settle on stock and let small parts drop behind the run.
| Consideration | Open steel shelving | Closed steel shelving |
|---|---|---|
| Access | All four sides; ideal for two-way pick aisles and island runs | Front only; suits wall runs and perimeter storage |
| Dust and debris | Stock is exposed to airborne dust and plant debris | Solid back and side panels keep the bulk of it off stock |
| Cross-aisle spill | Items can be pushed through to the aisle behind | Panels stop push-through and hold loose parts in place |
| Appearance | Utilitarian; contents visible from every angle | Tidier, more finished look in customer-facing rooms |
| Light and sprinkler flow | Best airflow and light penetration through the run | Reduced airflow; plan sprinkler coverage with your fire contractor |
| Ship weight (18" x 36", 75"H, 6 shelves) | 89 lb | 136 lb |
| Best for | Active parts picking, tool cribs, kitting, WIP staging | Archive and records storage, dirty plants, retail backrooms |
A practical middle path exists and is often the right answer: run open units through the middle of the room and closed units around the perimeter, sharing the same shelf part numbers so spares and future add-ons interchange. If only certain items need containment, add back panels to selected bays rather than buying closed units throughout — see accessories below.
Unit heights, shelf sizes and shelf counts
Steel shelving is specified in three numbers: shelf depth, shelf length and unit height — then a shelf count. The 22 gauge all-welded units we supply most often come in two heights, 39"H for counter-height and under-mezzanine runs, and 75"H where the ceiling and reach allow it. Shelf sizes are 12" x 36", 18" x 36" and 18" x 42", and complete bin and heavy-duty units also come 24" deep. Shelf counts run 4, 5 or 6 levels at 39"H and 4 through 8 levels at 75"H, which is how you tune the opening height to what you actually store.
| Unit height | Shelf sizes (D x W) | Shelf counts | Open unit ship weight | Closed unit ship weight |
|---|---|---|---|---|
| 39"H | 12" x 36" | 4, 5 or 6 shelves | 45–61 lb | 71–87 lb |
| 39"H | 18" x 36" | 4, 5 or 6 shelves | 63–87 lb | 94–118 lb |
| 39"H | 18" x 42" | 4, 5 or 6 shelves | 75–91 lb | — |
| 75"H | 12" x 36" | 4 to 8 shelves | 55–87 lb | 90–124 lb |
| 75"H | 18" x 36" | 4 to 8 shelves | 69–109 lb | 115–156 lb |
| 75"H | 18" x 42" | 4 to 8 shelves | 85–125 lb | — |
Ship weights matter more than people expect. They tell you how much steel is in the unit, they drive freight cost on a multi-bay order, and on an upper-floor or mezzanine installation they are the number your structural engineer asks for first. They are also the honest way to compare two quotes: a "heavy-duty" unit that ships 20% lighter than ours is not the same product.
Rule of thumb we use on site
Set the lowest shelf at 4–6" off the floor so a mop and a pallet-jack wheel can pass, keep the golden zone between 30" and 55" for your fastest-moving SKUs, and leave the top level for slow-moving or overstock. If you are still adding shelves after the unit is installed, buy the extra shelf levels with the original order — they are the cheapest capacity you will ever add.
What "22 gauge all-welded" actually buys you
The shelves in the Quantum IRONMAN units we stock are 22 gauge all-welded steel with a smooth powder coat finish, and each shelf assembles to the posts with four nuts and bolts. That specification does three things. The welded box construction stops the shelf pan flexing and spreading under a distributed load, so a shelf still sits flat after years of loading. The powder coat is smooth and easy to wipe down, and it does not shed the way painted mill finishes do. And the bolted shelf-to-post connection means a damaged shelf is a spare part, not the end of the unit — you unbolt four fasteners and drop a new shelf in.
Post design is the other half of the unit. Slotted or punched posts on close centres let you move shelf levels in small increments instead of coarse jumps, which is what makes it possible to match openings to real carton heights. Corner posts also carry the vertical load path down to the floor, so post condition, plumb and floor contact are what you inspect when a run starts to feel loose.
Closely Slotted PostsSmall adjustment increments mean openings match carton and tote heights instead of wasting 2–3" of clear height per level.
Positive Shelf EngagementBolted or clipped shelf-to-post engagement transfers load into the post and keeps the shelf square under uneven loading.
Anchoring & LevellingTall runs, seismic regions and any unit over roughly 4:1 height-to-depth get anchored and shimmed. We plan anchors with your facility team; your local authority sets the requirement.| Specification | What we supply | Why it matters |
|---|---|---|
| Shelf material | 22 gauge all-welded steel shelf pans | Resists flexing and spreading under distributed load |
| Finish | Smooth powder coat | Wipes clean, resists chipping, no rust bloom from bare edges |
| Shelf assembly | Four nuts and bolts per shelf | Individual shelves are replaceable and repositionable |
| Adjustability | Multiple slot positions per post | Openings tuned to carton, tote and bin heights |
| Capacity | Up to 400 lb per shelf, uniformly distributed | Covers hand-stacked cartons, bins and most loose parts |
| Bays | Starter units plus shared-post add-on units | Long runs cost less per linear foot than free-standing units |
Load capacity: the number everyone quotes and almost nobody applies correctly
Published shelf capacity — up to 400 lb per shelf on the units we stock most — is a uniformly distributed load. It assumes the weight is spread evenly across the shelf pan, not concentrated in the middle or on one corner. A 350 lb transmission case in the centre of a 400 lb shelf is not a 350 lb load in engineering terms, and that is exactly how shelves get bent. Three practical rules follow from this, and they cover almost every failure we get called out to look at.
- Spread the load. Distribute across the full shelf width; put point loads on a shelf rated well above the item weight, or on decking designed for it.
- Heavy low, light high. Loading a run top-heavy is the most common cause of a unit feeling unstable, and it makes every pick more dangerous.
- Do not sum shelf capacities into a unit capacity. Eight shelves at 400 lb is not an automatic 3,200 lb unit — total unit capacity depends on post, frame and floor loading. Ask us for the unit figure before you plan a heavy installation.
- Check the floor, not just the shelving. Upper floors, mezzanines and older slabs have their own limits; your structural engineer or the building owner sets those.
- Inspect after any impact. A post struck by a pallet jack has lost capacity even if it still looks straight. Replace damaged posts and shelves rather than derating by eye.
What we will not do
We will not tell you a shelving installation "meets code". Anchoring, seismic bracing, aisle widths, sprinkler clearance and permitting are set by your local authority having jurisdiction, your insurer and your engineer of record. What we do is supply units with published capacities, build the run to the criteria your team provides, and document exactly what was installed.
Accessories that change what a steel shelving run can do
The reason steel shelving stays in service for decades is that the unit is a platform. Almost every storage problem that shows up after installation — small parts getting lost, stock pushing through, tools walking off, no work surface at the pick face — is solved by an accessory rather than a new unit. These are the ones we quote most often.
Shelf DividersTurn one wide shelf into 3–8 addressable compartments. The cheapest way to stop small parts migrating and to make a location label mean something.
Back & Side PanelsAdd containment to selected bays of an open run instead of buying closed units throughout. Also stiffens a tall unit noticeably.
Drawer ModulesConvert one or two openings into shallow drawers for high-count small parts, tooling and inserts — drawer density inside a shelving footprint.
Pull-Out Reference ShelvesA work surface exactly where the picking happens: kitting, counting, labelling and paperwork without walking to a bench.
Security Panels & DoorsLock one bay of an open run for high-value, controlled or consumable-theft items. Mesh keeps visibility; solid panels do not.
Decking & Bulk LevelsWood or wire decking on wider bays for bulky, awkward and hand-stacked items. Wire decking also lets sprinkler water and light through.Buy accessories with the units
Extra shelf levels, dividers, panels and label holders bought with the original order arrive on the same freight and in the same finish batch. Bought a year later they cost more per piece, arrive separately, and occasionally do not match the finish. When we quote a run we list them as separate lines so you can decide with the numbers in front of you.
Steel shelving supplied complete with plastic bins
For small-parts storage the fastest specification is not a unit plus a bin list — it is a complete package where the bin count, bin size and shelf spacing were worked out for you. The galvanised steel bin packages we supply come in 12" deep and 18" deep builds on a 36"W x 75"H unit with up to 400 lb per shelf, loaded with giant open-hopper bins in a single color per unit. Optional clear window fronts increase usable bin volume and stop spillage; optional dividers split each bin into compartments.
| Package depth | Typical build | Bin sizes supplied | Best for |
|---|---|---|---|
| 12" deep | 10 shelves with 36 small hopper bins plus 12 medium bins | 10-7/8" x 5-1/2" x 5" and 14-3/4" x 8-1/4" x 7" | Mixed fastener and small component rooms |
| 12" deep | 8 shelves with 28 medium hopper bins | 10-3/4" x 8-1/4" x 7" or 14-3/4" x 8-1/4" x 7" | Dealership and MRO parts with mid-size items |
| 12" deep | 8 shelves with 14 wide hopper bins | 14-3/4" x 16-1/2" x 7" | Bulkier parts kept at the pick face |
| 18" deep | 8 shelves with 21 large bins | 16" x 11" x 8" | Assembly feed and kitting components |
| 18" deep | 7 shelves with 24 deep bins | 18" x 8-1/4" x 9" | Long, narrow parts and sub-assemblies |
| 18" deep | 6 shelves with 15 tall bins | 18" x 11" x 10" | High-volume consumables |
| 18" deep | 6 shelves with 10 extra-large bins | 18" x 16-1/2" x 11" | Large parts that still need a hopper front |
If bins are the point of the project rather than a bolt-on, start in the dedicated sections: bin shelving systems covers complete wire and steel bin units and sloped pick racks, bin storage cabinets covers all-welded cabinets with bins behind doors, and industrial storage bins is the hub for the bins themselves — including plastic shelf bins in 4", 6" and 8" front heights that drop straight onto a 12", 18" or 24" deep steel shelf.
Steel shelving vs the alternatives
Steel shelving is the right answer more often than not, but not always. This is the comparison we walk through before quoting, and where each alternative genuinely wins.
| System | Best at | Watch out for | Where it lives on our site |
|---|---|---|---|
| Steel shelving (this page) | Hand-stacked cartons, bins, trays, archive boxes; fine shelf adjustment; closed options | Not for palletised loads; shelf spans are modest | You are here |
| Wire shelving | Airflow, visibility, wash-down and mobile applications; sprinkler-friendly | Small items need mats or bins; costs more per shelf | Wire shelving |
| Boltless / rivet shelving | Bulk cartons and wide bays with decking; fast assembly with no fasteners | Coarser shelf adjustment; decking adds thickness per level | Boltless shelving |
| Bin shelving systems | Small-parts rooms where the bins are the storage medium | Bin fit drives the whole design; get it wrong and capacity is lost | Bin shelving |
| Stainless steel shelving | Corrosive, wet and wash-down areas that must be cleaned aggressively | Significant cost premium; specify only where needed | Stainless shelving |
| High-density mobile shelving | Doubling capacity in a fixed room by removing fixed aisles | Needs track, floor tolerance and a single-user access pattern | Mobile shelving guide |
| Pallet racking | Palletised, forklift-handled loads | Wrong tool for hand-stacked small goods; aisle widths grow | Shelving solutions overview |
Two related pages are worth a look if you are still narrowing the field: metal shelving covers the broader metal shelving family in buyer language, and industrial shelving looks at the same decision from a whole-facility point of view. For polymer and wire shelving in food and clean environments, and for anything going into a clinical setting, our sister company covers healthcare and laboratory storage at Labs USA.
Where steel shelving earns its keep
Six industrial and commercial applications we specify steel shelving for every month, and what changes in the specification for each one.
Supply Depots & Distribution Pick FacesThroughput first. Open units, mixed openings, fast movers at waist height and clear location labelling. Add dividers where one shelf carries several SKUs.
Records & Archive StorageUniform boxes, uniform openings. Closed or open runs sized exactly to the carton so no clear height is wasted, with the run depth matched to a single or double box row.
Corporate & Government Back-of-HouseTidy, contained, repeatable. Closed-back ranges keep the aisle looking finished and stop boxes being pushed through into the next range.
Controlled & High-Value StockLock the bay, not the room. Secured bays with mesh or solid doors inside an otherwise open run, so chain-of-custody items are separated without a second room.
Collections, Parts Museums & Long-Term StorageAccess without handling damage. Wide shelf spacing, closed backs and a stable, level installation matter more than raw capacity for slow-moving, fragile stock.
Reference Rooms & Tall RunsReach and stability. 75"H units, anchored where required, with the top level reserved for slow movers so routine picking stays inside safe reach.How we specify and quote a steel shelving run
Five steps, and we do the work in all of them. You do not need to arrive with part numbers.
Profile the stock
Tell us what goes on the shelves: carton and tote sizes, heaviest item, how many SKUs, how often they are picked, and whether anything is dirty, oily or high-value.
Measure the room
Clear ceiling height, obstructions, sprinkler heads and lighting, door and aisle widths, and the floor condition. Photos and a rough sketch are enough to start.
Set depths, heights and openings
We pick shelf depth and length from the stock profile, then set the shelf count and opening heights so nothing is stored on its side or double-stacked unsafely.
Decide open, closed or secured, and add accessories
Panels where containment matters, dividers where a shelf carries several SKUs, drawers for high-count small parts, doors where stock walks.
Quote as a run, then deliver and install
Starter and add-on bays, accessories, freight and installation coordination in one quote — with the shelf capacity and unit weights stated so your team can check them.
Shop Online at MaterialHandling-USA.com
Buying a handful of units rather than a run? Standard steel shelving, bins and accessories are stocked on our e-commerce store.
Steel shelving FAQ
How much weight can a steel shelf hold?
What is the difference between open and closed steel shelving?
What sizes does industrial steel shelving come in?
Can I add shelves to a steel shelving unit later?
Do steel shelving units need to be anchored to the floor or wall?
Is steel shelving better than boltless or rivet shelving?
Can steel shelving be used with plastic bins?
How do open and add-on units differ, and do they save money?
What finish does steel shelving come in, and will it rust?
Do you install steel shelving, or is it delivered flat?
Related shelving & storage sections
Bin Shelving SystemsComplete wire and steel bin shelving units, sloped pick racks and mobile bin systems for small-parts rooms.
Metal ShelvingThe wider metal shelving family in buyer language, including clip, boltless and four-post builds.
Shelving Solutions OverviewEvery shelving family we supply, with guidance on choosing between them for a whole facility.
Industrial ShelvingFacility-level view of industrial shelving selection, layout and installation.
Wire ShelvingChrome, epoxy and stainless wire shelving for airflow, wash-down and mobile applications.
Quantum Product CatalogBrowse the stocked Quantum steel shelving, wire shelving, bins and container range.Tell us what goes on the shelves — we will size the run
Send us your stock profile and room dimensions and we will come back with unit sizes, shelf counts, accessories and a quote for the whole run, including freight and installation coordination. No pricing games, no part-number soup.