Common trailer fabrication repairs
The repairs box trailers, car trailers and work trailers most often need, what causes them, and what a proper fix involves.
5 min read · Rivals Welding & Fabrication
Trailers live a hard life: they're loaded past their comfort zone, towed over rough ground and left out in the weather. These are the repairs that come through a fabrication workshop most often — and what a proper fix looks like for each.
Cracked drawbar or A-frame
The drawbar takes every load, brake and bump. Cracks usually start at the coupling plate welds or where the A-frame meets the main chassis. A proper repair means grinding the crack fully out, welding it with full penetration, and normally adding a gusset or doubler plate to spread the load. Where the section is badly cracked or has been repaired before, the affected length is cut out and new RHS let in.
Note: repairs to the drawbar and chassis affect the trailer's safety and roadworthiness. Any such work is assessed carefully and only quoted where it can be done properly.
Broken or rusted guards
Guards crack at their mounting brackets from vibration, and rust through along the lower edge where mud and water sit. Cracked brackets are re-welded and reinforced; rusted guards are usually cheaper to replace with new folded guards than to patch.
Rusted floor and side sections
Water sits in the corners of box trailers. Once the floor sheet or the bottom of the sides has rusted through, the fix is to cut the affected section out square and weld in new sheet, then seal the seams. Patching over rust doesn't last.
Tie-down points
Factory tie-downs are often light. Proper tie-down points — rated D-rings or welded loops on a backing plate — are welded to the chassis, not the sides, so the load goes into the frame.
Tailgate and ramp repairs
Hinges wear, latches break and ramps bend under loads they were never designed for. Hinges are replaced with heavier pins and bushes; bent ramps are straightened where possible or rebuilt with heavier section.
Toolbox, spare wheel and jerry-can mounts
These are common additions: a mount on the drawbar for a toolbox or spare, or brackets on the side for fuel cans. Made from folded plate and welded to the frame so nothing rattles loose.
Cages, racks and extensions
A mesh cage or a ladder rack turns a box trailer into a work trailer. These are fabricated to fit your trailer, made to be removable where you want them to be, and sized so they don't overload the trailer or exceed height limits.
Lights, wiring and electrics
Not fabrication — but often the bracket the light sits on is. Broken light brackets are a quick fabrication fix.
What to send us
A wide photo of the trailer, a close-up of the damage with a tape measure in the shot, and a note on whether you can bring the trailer to the workshop. See our guide on photos for welding repairs.