Nest pitch designed so empty cages take a fraction of the loaded space
Nesting pitch is the number that matters: how much length each additional empty cage adds. It is set on the drawing before the frame is finalised, not discovered after delivery.
Nestable Roll Cage / Roll Container
Nestable Roll Cage Trolleys Built to Your Drawing
Roll cages that nest when empty, so a return route or a warehouse floor does not fill up with parked carts. Nesting changes the frame: the base, the side panels, the door hardware and the caster position all have to clear the cart that slides into it. Send the packed footprint you need to store, the route the loaded cage travels, and how many empty cages have to fit in the space you have.
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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
Roll cage buyers usually specify the loaded cart and discover the empty problem later: a yard or back room that fills with cages, a return trip that carries mostly air, or a cage that nests on paper but jams in practice because the base or door hardware catches. The cost shows up in floor space and freight, not in the unit price.
Doing Metal Solution
Send the loaded footprint and target load, the mesh and door requirements, the number of empty cages you must park or ship in a given space, and the route and floor condition. We review the base depth, panel fold, hinge and latch clearance, caster position and the resulting nest pitch, then quote from a drawing that states the space each empty cage needs.
Base, panel and door geometry checked against the nesting step
Nesting requires clearance at the base, hinges, drop-down shelves and the caster mounts - if any of those project, the cage will not slide in fully.
Mesh, wire gauge and door hardware sized for the cargo and the wash-down method
Wire gauge and mesh opening follow the smallest package that must stay inside and the abuse the cage takes on the route, including wash-down if it is cleaned.
Caster layout that still rolls and brakes reliably in both nested and loaded states
A nested row of cages has to stay stable and must not roll apart, so brake position and caster type are reviewed for the nested state as well as the loaded one.
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.
A fleet staged before dispatch - the nest pitch is what decides how many of these fit in your return area.
Folded state - panels and base have to clear the next cage in the row.
In service - loaded geometry is designed first, then nesting is engineered around it.
Base and casters - the most common cause of a cage that will not nest properly.
Corner welds - cage frames fail at corners and hinges, not in the middle of a panel.
A row in service - nesting only pays off if the parked row stays safe to walk past.
Customization
Custom Options to Confirm Before Quotation
These options change material use, process route, tooling, assembly time, packing volume, and final cost.
Nest pitch and how much length each empty cage adds
Base depth, frame section and caster mount position
Mesh opening, wire gauge and panel fold direction
Door type, hinge side, latch and any lock provision
Drop-down or removable shelves and dividers
Finish: zinc plate, powder coat or galvanized
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 |
|---|---|---|
| Empty storage | How many empty cages must fit, and where | Decides nest pitch, and whether foldable sides or a fixed nestable frame is the better answer |
| Return route | Whether empty cages travel back by truck or stay on site | Return freight is where nesting pays back, so it should be quantified before quoting |
| Cargo | Smallest package and the abuse level on the route | Decides mesh opening, wire gauge and whether a shelf or divider is needed |
| Cleaning | Wipe down, pressure wash, or chilled environment | Decides finish and whether hardware needs to be stainless |
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.
Nesting trial with a real cage, not a calculation
Door and latch function on the loaded cage
Frame squareness and diagonal check
Caster rolling and brake holding when nested
Weld inspection at corners and hinge points
Finish and packing protection for stacked cages
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
Retail distribution and store delivery
Parcel and mail sortation
Warehouse replenishment routes
Return logistics and empty cage back-haul
Cold chain and chilled distribution
Laundry and linen routes
Hospital and facility supply
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 much space does a nested row of cages actually save?
It depends on the nest pitch, which is set by base depth, panel fold and caster position. Tell us how many empty cages must fit in the space you have and we will design the pitch to meet that number, then state it on the drawing.
Can the cage both fold and nest?
Many designs do both, but folding and nesting hardware compete for the same clearance. Decide which matters more for your return route and we will engineer around that priority.
What finish suits a cage used in chilled or wash-down areas?
Galvanized or stainless hardware with a compatible coating, and stainless fasteners where cleaning is aggressive. Describe the cleaning method and we will specify the finish and hardware together.
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.
