Frame Repair vs Beam Replacement: What's the Difference?

"Do we need a new frame or just a beam?" is the most common question we get after an impact, and the answer depends less on how bad the damage looks than on which component was hit and what that component does in the structure.

The Structural Difference

Uprights carry everything. A frame consists of two upright legs joined by diagonal and horizontal bracing. The uprights carry the vertical load of every beam level above the point of damage and transfer it to the floor through the base plate. They are slender relative to that load, so their governing failure mode is buckling — and buckling failure happens suddenly, at a load that depends heavily on the straightness and section integrity of the leg.

Beams carry their level. A beam pair carries the pallets on that level and transfers the load into the upright perforations through the end connectors. Beams are designed with predictable deflection behaviour: they bend visibly under load and recover. That predictability is why they are considered the more replaceable element of the system.

Bracing keeps the frame square. Bracing members do not carry vertical pallet load directly but they control the effective buckling length of the uprights and resist sway. Removing or deforming a brace changes the capacity of the frame even though nothing appears to be supporting less.

The Tolerances That Decide It

• Upright frontal (cross-aisle) bend: 3 mm maximum over a 1 metre gauge length
• Upright lateral (down-aisle) bend: 5 mm maximum over a 1 metre gauge length
• Bracing members, either plane: 10 mm maximum over a 1 metre gauge length
• Beam deflection under working load: span / 200 — a 2,700 mm beam must not exceed 13.5 mm
• Beam residual deformation once unloaded: span / 1000

Note how much tighter the upright figures are. That difference is the whole answer to why frame damage is treated more seriously than beam damage.

When a Beam Replacement Is the Right Repair

Beam-only work is appropriate when the damage is confined to the beam itself and the uprights and bracing measure within tolerance. Typical cases:

• A beam struck on the face and visibly bent, or retaining permanent set once unloaded
• A cracked weld at the connector
• A connector partly sheared or deformed so it no longer seats fully
• A beam that has been dislodged upward by fork contact
• Missing safety clips or locking pins, which is a component swap rather than a repair

The work itself is straightforward: offload the level, remove the damaged beam pair, fit the correct replacement length and section with the right connector for that system, engage the connectors fully, fit safety clips, and confirm the level is square and set at the height the load notice assumes. Common lengths — 1,350 mm, 2,700 mm and 3,300 mm — cover a large proportion of UK installations, but section depth and thickness must also match, because two beams of the same length can have very different capacities.

When Frame Work Is Required

Frame work is needed when any upright or bracing measurement is out of tolerance, or when the geometry of the frame has changed.

Lower-section damage. The most common case: the bottom metre of an upright dented or bowed by fork contact. Where the system supports it, a manufacturer-approved repair to that section, or replacement of the affected leg section with its bracing panel, restores the frame without replacing everything.

Damage higher up the frame. More disruptive, because the bay must be fully offloaded and the load path supported. Usually resolved by full frame replacement.

Frame twist and out-of-plumb. Often the result of accumulated smaller impacts rather than one big one. Correction involves replacement and re-shimming to bring the frame back within tolerance, not pulling it straight.

Base plate and anchor damage. Torn plates, pulled anchors or spalled concrete around fixings. This is frame work even when the upright above looks perfect, because the base connection is what makes the frame a structure rather than a stack.

Bracing damage. Replaced with brand-correct components. Substituting a brace from another manufacturer changes the panel geometry and the bolt pattern and is not acceptable.

Why Manufacturer Matching Matters So Much

Beam connectors interlock with the upright perforation pattern. Hole pitch, hole shape, connector hook profile and clip location differ between Dexion P90, Mecalux, Redirack, Link 51, Stow, Bito, Esnova, PSS, Apex and Polypal. A connector that only partially engages will appear to fit and will carry static load, then pull out under dynamic loading or a fork nudge. This is why we ask for the manufacturer, and why photographs of an undamaged equivalent component are so useful when the brand is unknown.

What Never Counts as a Repair

Straightening a bent upright, whether cold or with heat, is not an accepted repair method under SEMA guidance or BS EN 15635, because the residual capacity cannot be verified. Welding unapproved plates onto cold-rolled sections alters the section behaviour in ways nobody has calculated. Reusing floor anchors that have been pulled is likewise unacceptable. Where the correct component is not immediately available, the compliant interim control is to keep the bay offloaded and isolated.

The Compliance Context

Both kinds of work sit under the same duties. PUWER 1998 Regulation 5 requires maintenance in efficient working order, Regulation 6 requires inspection where safety depends on installation conditions or deterioration. HSE guidance HSG76 covers storage equipment including racking and shelving, and BS EN 15635 provides the damage classification and competent-person framework. Whichever repair route is taken, the outcome needs a written record of the components fitted, verification of fixings and plumb, and a return-to-service entry closing the damage register item.

Getting It Priced

For an accurate quotation we need frame height, frame depth, upright width and section for frame work, and beam length, section height and thickness for beam work, plus the manufacturer and photographs. Our enquiry tool asks for exactly those, so you can specify mixed quantities — for example ten frames of one brand and three uprights of another — in a single enquiry.

Send it through the contact form or call 0800 654 6955. If you are still deciding whether component repair or a new run is the right call, see racking repair vs replacement, and for keeping damage in the cheap-to-fix category, see our racking maintenance programme.