A trolley used in a real factory has to cope with payload, impacts when crossing floor gaps, and being pushed and pulled every day. If the frame is poorly designed, the trolley will sag, twist or crack at the welds long before it should. This article summarises how our engineers design trolleys that last and work in practice.
1. Start with Load and Use, Not Appearance
Before drawing anything, you need to know four things: the maximum payload, the size and shape of what will be carried, the floor conditions along the route, and how often the trolley is used. These decide the steel sizes, the number of load-bearing members and the wheel size.
2. Choose the Steel Section for Each Job
- Square/rectangular tube: strong in every direction, easy to weld and neat-looking — the usual choice for main frames and uprights
- Angle: ideal for edges that hold deck panels or trays, and for frames where goods must sit snugly
- Round pipe: ideal for push handles — comfortable to grip with no sharp edges
- Plate: used for heavy-duty decks and caster mounting pads
3. Points That Always Need Reinforcing
- Caster mounting points: these carry the entire load of the trolley — use a pad plate or a cross member under each caster plate rather than bolting it to thin steel
- Cross members under the deck: wide decks need extra cross members so they don't sag in the middle
- Upright-to-frame joints: multi-level trolleys need corner braces or gussets to stop racking when turning
- Handles: they take pushing and pulling forces every time — weld them along the full seam, not with tack welds
4. Match the Wheels to the Frame
A strong frame on wheels that can't take the load will still fail. Calculate load per wheel by dividing the total weight (trolley + goods) by 3, then add a safety factor as explained in our article on choosing load-rated wheels, and choose the right mix of rigid, swivel and brake casters for how it is pushed.
5. Design for the Operator Too
Handle height should sit between the operator's waist and chest, deck height should suit lifting goods on and off, and larger wheels should be used where floors have gaps — reducing push force and the risk of staff injury.
Summary
A good trolley starts with clear usage data, the right steel for each job, reinforced load points and wheels that genuinely carry the load. Whether you have drawings or just an idea, the IRONMAX team can design and build it for you.