Buying used longspan shelving is one of the most cost-effective ways to add hand-loaded storage to a warehouse, stockroom or workshop. The tricky part is rarely the shelving itself. It is making sure the bays you buy fit your space, match anything already on site and arrive with every part needed to build them safely.
Plenty of listings show a brand, a size and a UDL rating, then leave you to work out the rest. This post focuses on the questions that tend to catch buyers out: which brand is which, why parts rarely swap between makes, and how to measure a run before you commit. For a wider overview of shelf levels and standard sizes, see our longspan buyer’s guide.
Why Do Brands Matter When Buying Longspan Shelving?
Most longspan shelving follows the same basic design: upright end frames, pairs of horizontal beams and a deck sitting across them. From a distance, one make looks much like another. Up close, the differences are what count.
Each manufacturer uses its own hole pattern on the uprights, its own beam connector shape and its own locking clip. A beam from one brand might appear to drop into another brand’s frame, but if the connector does not engage fully, it is not doing its job. Parts that were never designed to work together can leave a shelf that looks fine but cannot be relied on to carry its rated load.
Even within one brand, older and newer versions can differ. Some earlier designs use a different lock or pin, so parts from different generations may not mix either. If you are extending an existing run, matching both the brand and the version is the safest route.
How Can You Tell Which Brand You Already Have?
The used market includes familiar names such as Apex, AR, Link 51, Polypal, Mecalux, Renolds and Dexion. If you already have bays on site, start by identifying exactly what is there.
A few practical checks help:
- Look for markings. Many uprights are stamped or labelled by the manufacturer.
- Check the hole pattern. Note the shape and spacing of the holes up the upright.
- Photograph the beam ends. Connector shape and clip design are often the quickest way to tell makes apart.
- Measure the frame. Record its height, depth and upright section size.
Some older systems are now obsolete or have been replaced by newer ranges, so identification is not always straightforward. Clear photos of the frame, beam end and clip sent to an experienced supplier usually settle it quickly.
Starter Bays, Extension Bays and Measuring Your Space
A starter bay is a complete standalone unit with two end frames, beams, locks and decks. An extension bay has only one end frame because it shares a frame with the bay beside it. A run therefore needs one starter bay, with extension bays added as space allows.
This matters when buying longspan shelving second hand, because a run described as five bays could mean very different quantities of frames. Always check how many frames are included and that every beam pair, lock and deck is accounted for.
When measuring, remember that beam length is not the full footprint. Each frame adds its own width to the run, so add the frame widths to the total beam length using the manufacturer’s dimensions. Leave room for access, door swings and building columns too.
What Should You Check on Used Longspan Shelving?
A lot of stock comes onto the used market because businesses relocate, change layouts or close, not because it has failed. Even so, the condition of used longspan shelving still needs checking bay by bay.
Look for twisted or bent uprights, dented or bowed beams, rust, cracked welds and missing locking clips. Decks deserve attention too. Chipboard decks can swell, crack or sag if they have been stored damp, while steel decks should sit flat without buckling. Our article on what good used condition really means covers this in more detail, and if existing shelves are already bowing, it is worth reading about the signs of sagging shelves.
Load capacity should always come from the manufacturer’s specification for that frame and beam combination, stated as a UDL per shelf. Shorter beams generally carry more than longer ones of the same section, but never assume a rating without checking.
Installation and Ongoing Checks
Correct assembly matters as much as the parts themselves. Professional shelving installation makes sure frames are plumb, beams are fully engaged and locks are in place. After that, regular visual checks by a nominated member of staff help spot damage early, with periodic inspections by a competent person recommended for equipment in daily use.
Monarch Shelving has supplied new and used shelving across the UK for over 20 years, with used longspan shelving from Apex, AR, Link 51, Polypal Minipal and Renolds held in stock. Browse our full shelving range to see what is available. We also buy used storage equipment at competitive rates if you are clearing space.
FAQ’S
It is not recommended. Each brand uses its own hole pattern, beam connector and locking clip, so parts that appear to fit may not engage properly. Matching both brand and version is the safest approach.
Check the uprights for stamped markings, then compare the hole pattern, beam connector shape and clip design. If you are still unsure, send clear photos to an experienced supplier.
It depends on the frame, beam length and deck. Always use the manufacturer’s UDL rating for that exact combination, and ask the supplier for the specification before loading anything.
Reusing sound steel bays avoids the need to manufacture new components, which reduces waste. Selling your old shelving on when you upgrade keeps it in use for longer too.
To find out more or to discuss your storage requirements, contact the Monarch Shelving team today on 0161 627 3444 or email sales@monarchshelving.co.uk.
