Bolted joint layout designed around a target assembly time
Every bolted joint is a place the cart can loosen, so the joint design matters more than the reduction in volume.
Knock-Down Cart / Flat-Pack Trolley
Knock-Down Carts Packed Flat for Export
Carts designed to ship as a flat pack and assemble at destination, for programmes where container volume costs more than the assembly time. Knock-down is a drawing-level decision: which joints bolt instead of weld, how many fasteners the assembly needs, what tools are required, and whether the assembled cart is as stiff as a welded one. We review all four before quoting, because a cart that assembles quickly but flexes in service is a false saving.
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Materials: steel, stainless steel or aluminum by project
Load: engineered to your target cargo and route
Wheels: PU, rubber, nylon or pneumatic with brake options
Finish: powder coating, plating, galvanizing or stainless
Product Overview
Built Around Load, Movement, Storage and Safety
Doing Metal can customize trolley structure based on your drawings, product photos, sample design, working environment, and quantity target. We review frame strength, caster layout, platform or shelf design, finish, and packing before quotation.
Buyer Problem and Custom Solution
Programmes compare unit prices and miss the freight line. A cart that ships assembled can cost more to land than a knock-down design even when the knock-down unit costs slightly more, and the difference grows with distance. The risk is going flat pack on a structure that should have been welded, then paying for it in warranty claims about wobble and loose fasteners.
Doing Metal Solution
Tell us the target container quantity or the freight constraint, who assembles the cart and with what tools, whether it is assembled once or repeatedly, and the load it must carry. We then propose which joints bolt and which weld, quote both assembled and knock-down where possible, and give you the flat-pack carton size so landed cost can be compared properly.
Fastener count and tooling kept realistic for your team or your customer
Assembly time is part of landed cost: a pack that saves freight but needs forty minutes and three tools may lose against a semi-assembled alternative.
Flat pack dimensions calculated so container use can be quoted
Flat pack dimensions are calculated from the parts, not estimated, so a container quantity can be quoted rather than guessed.
Assembled stiffness checked against the load, not assumed
Where stiffness matters - long shelves, heavy point loads, tall frames - we will say so and propose welded sections in those specific places.
Workshop Photos
What We Actually Build, Photographed in Our Own Workshop
Every photo on this page was taken in our own workshop or at our customer site. No stock images, no renderings.
Staged before packing - flat pack changes what a container holds.
Packed to a pallet plan - carton sizes are set by the part layout.
Staged in the workshop - each carton is a cart, counted and labelled.
Protection inside the carton - panels and finish separated for the voyage.
A repeat batch - the packing method is part of the drawing set.
Crated where it helps - sometimes a crate beats a carton for fragile finishes.
Customization
Custom Options to Confirm Before Quotation
These options change material use, process route, tooling, assembly time, packing volume, and final cost.
Which joints bolt and which stay welded
Fastener count, type and the tooling required
Flat-pack carton dimensions and units per container
Assembly instructions and labelling for your market
Finish protection for parts packed against each other
Spare fastener kits included in the same shipment
Buyer Decision Guide
Details That Decide Whether This Trolley Will Work in Daily Use
Use this section before sending an RFQ. It translates the search term into the practical design points our team needs to review.
| Decision Area | What to Confirm | Why It Matters |
|---|---|---|
| Freight vs labour | Cost of the container against cost of assembly | Knock-down wins on long routes; assembled wins where labour is expensive |
| Assembly frequency | Assembled once, or taken apart regularly | Carts that are re-assembled often need better joint design than one-time builds |
| Stiffness | Point loads, long shelves, tall frames | Some structures should stay welded even in a knock-down programme |
| Destination | Warehouse with tools, or a store with none | Decides fastener type, tooling and whether instructions go in the carton |
Engineering Choices
Key Details That Change Trolley Performance and Cost
Foreign material handling buyers often compare the same trolley by load class, wheel system, ergonomic design, towing method, surface finish, and packing. Confirming these details early helps avoid under-built carts and unnecessary cost.
Frame and Deck
Tube size, plate thickness, reinforcement ribs, weld layout, and deck surface should match the real load, cargo footprint, and impact during use.
Caster Layout
Two fixed plus two swivel wheels, four swivel wheels, brake casters, pneumatic tires, or larger PU wheels can be selected for different routes and floor conditions.
Push, Pull or Tow
Manual push handles, double handles, tow bars, coupling arms, forklift handling, or AGV interface requirements can be reviewed for custom projects.
Safety and Parking
Brake position, side rails, mesh guards, anti-slip decks, wheel locks, and load distribution help make the trolley safer during loading and parking.
Finish Durability
Powder coating, galvanizing, stainless steel, or custom color should be selected based on indoor/outdoor use, corrosion exposure, and brand requirements.
Export Packing
Assembled, semi-assembled, knock-down, carton, pallet, and spare wheel packing options affect freight volume, assembly time, and after-sales support.
Quality Checks
Inspection Points for This Trolley Type
Quality checks are adjusted according to the actual trolley type, structure, load, and application.
Trial assembly of the first pack before the batch
Fastener fit and torque check at each joint
Assembled stiffness and deflection check under load
Carton count, weight and labelling check
Finish protection inspection inside the pack
Spare parts and instruction sheet inclusion check
Angle and squareness checked against a template on every welded frame.
Joint-by-joint angle checks happen during assembly, not only at final inspection.
Same gauge, same angles — that is how unit 500 matches unit 1.
Specifications
Custom Trolley Specification Options
| Item | Options to Confirm |
|---|---|
| Load Capacity | Confirmed from the actual cargo, load distribution, route, floor and safety factor; the quotation should not rely on a generic load class alone |
| Sheet / Tube Thickness | Confirmed from material grade, load path, part geometry and downstream process. Current thickness limits are reviewed against the selected machine and drawing. |
| Material | Carbon steel, stainless steel, aluminum, steel mesh, or combined structure |
| Size | Standard or custom platform, shelf, cage, or drawer dimensions |
| Wheel Type | PU, rubber, nylon, pneumatic, fixed, swivel, brake caster, or heavy-duty caster |
| Structure | Flat platform, shelves, side rails, cage, drawers, foldable handle, knock-down packing |
| Finish | Powder coating, galvanizing, stainless finish, custom color, or other finish as required |
| MOQ / Sample | Standard MOQ is 50 units. For large-size or heavy-duty trolley projects, quantities from 10 units may be discussed. Sample and first-article arrangements are reviewed separately. |
| Lead Time | Quoted after drawing, material, quantity, finish, wheel sourcing and packing are confirmed |
| Packing | Fully assembled, semi-assembled, knock-down, carton, pallet and spare-part options |
| Branding | Logo, label, custom color, private-label packing, and distributor program support |
DFM and Inspection Review
Six Design Risks We Check Before the Trolley Enters Production
A drawing can look complete and still leave the most expensive problems unresolved. Attach your drawing or reference photos and identify these points before quotation.
Caster plate flatness, bolt pattern and wheel clearance
Load path from deck or shelves into the welded frame
Handle height, reach, turning space and operator access
Hole, slot and bend clearance around assembly interfaces
Finish build-up around threads, hinges and moving parts
Assembled or knock-down packing volume and protection
Applications
Where This Trolley Is Used
Distributor programmes shipping onward
E-commerce and retail fulfilment rollouts
Export programmes where freight dominates cost
Seasonal or pop-up site fit-outs
Franchise and branch equipment kits
Projects with limited unloading facilities
Spare-part and service cart kits
Related Pages
Continue the Product and Process Review
These links help Google and buyers understand which page owns each topic, while giving your team the supporting process details.
Manufacturing Process
From Structure Review to Export Packing
The production route can include tube cutting, laser cutting, CNC bending, welding, surface treatment, wheel installation, final function checks, and export packaging. For OEM projects, drawings or samples help improve quotation accuracy.
RFQ Details Needed
- Product type, reference photo, or drawing.
- Overall size, platform size, shelf count, or cage dimensions.
- Target load capacity and cargo type.
- Wheel type, brake requirement, and floor condition.
- Material, finish, color, logo, packing, and order quantity.
FAQ
Common Questions Before Ordering Custom Trolleys
How long does assembly take per cart?
It depends on the joint layout and how many fasteners are involved. We design to a target assembly time agreed during RFQ and confirm it with a trial assembly of the first pack before the batch runs.
Is a knock-down cart as strong as a welded one?
Not automatically. Bolted joints can loosen under vibration and repeated loading. We review where stiffness matters and will recommend welded sections in those places rather than making the whole cart bolted.
Can you quote assembled and knock-down side by side?
Yes, and it is the best way to compare. Ask for both unit prices plus the container quantity each version achieves, then compare landed cost including assembly labour.
Can you customize the size?
Yes. Overall size, platform size, shelf layout, cage size, handle height, and wheel configuration can be customized based on your use case.
Can I send a photo instead of a drawing?
Yes. Photos, samples, sketches, and use requirements can start the review. Drawings are recommended for accurate quotation and production.
Which wheel should I choose?
Wheel choice depends on load, floor type, noise requirement, movement distance, brake needs, and whether the trolley is pushed, pulled, or parked on slopes.
Can the trolley be foldable?
Foldable handles, foldable cages, removable shelves, and knock-down packing can be discussed when storage space or freight volume is important.
Do you support OEM branding?
Custom color, logo plate, label, carton artwork, and distributor packing can be reviewed for OEM and private-label trolley programs.
Can it work with towing equipment?
For heavy loads or long routes, please confirm tow bar, coupling arm, forklift, tugger cart, or AGV interface requirements during the RFQ stage.
What is the MOQ?
Our standard MOQ is 50 units for most custom trolley programs. For large-size or heavy-duty projects, quantities from 10 units may be discussed after reviewing the structure, material, casters, finish and packing. Samples and first articles are handled separately.
Can you quote from a PDF, DWG, DXF or STEP file?
Yes. Those formats are accepted for review, and reference photos or samples are useful when the drawing does not show the working environment.
How is lead time confirmed?
Lead time is confirmed after the drawing revision, material, quantity, finish, wheel model and packing method are agreed. We avoid giving a generic date that does not fit the project.
Can you provide supplier approval documents?
Tell us which documents your purchasing team needs. Material, inspection, packing and project records can be discussed, while certifications are published only after internal verification.
How will the trolley be packed?
We can review assembled, semi-assembled or knock-down packing, including cartons, pallets, hardware bags, labels and finish protection according to the shipping plan.
Can I request a sample or first article?
Yes. Sample or first-article review can be discussed according to the drawing maturity, project quantity, tooling and approval process.
Request a Quote for This Trolley
Send your trolley type, load capacity, size, wheel requirement, quantity, and drawings or reference photos. Our team will review the structure and reply within 24 hours on business days.
Urgent project? Email gao@doingmetal.com or WhatsApp +86 18158549983.
