Library Book Cart with Wheels
SKU: FL-LB-002
Double-sided library book cart with 4 shelves, 100kg capacity, movable between stacks.
| Material | Q235 steel tube + powder-coated wire mesh |
|---|---|
| Manufacturing Process | Tube bending + MIG welding + powder coating |
| Surface Finish | Powder coating (white/black/custom) |
| Tolerance | ±0.5mm |
| Dimensions | 1000×600×1100mm |
| Shelves | 4 (double-sided) |
| Capacity | 100kg |
| Wheels | 4× swivel (2 with brake) |
| MOQ | 20 units |
| Lead Time | Quoted after drawing review and process confirmation |
| Sample Time | Quoted after drawing review and process confirmation |
| Sample Fee | USD 180 |
| Price Range | USD 145-210/unit |
| Applications | Public libraries, archives, schools |
| Compliance | ISO 9001 |
| Export Markets | USA, UK, Germany |
How This Cart Is Made and Checked
A book cart fails in service for three reasons: a frame that will not sit flat, a shelf that sags under load, and a castor that stops swivelling because of a burr or a weld at the leg. All three are settled before the coating goes on, which is why the checks below sit where they do.
| Stage | What happens | What is verified before the job moves on |
|---|---|---|
| Tube cutting and bending | Frame tube is cut to length and bent to the cart profile on a CNC bender | The first leg off the bender is measured for radius, length and springback; the run continues on the setting measured from that part, not from the previous batch |
| Shelf and mesh forming | Shelves are formed and the mesh panels are fixed to their shelf frames | Shelf flatness and the fixing positions on the first piece. A shelf that sits proud shows up later as a wobble in the assembled cart |
| Frame welding and squaring | Legs, shelf rails and the top frame are MIG welded in a fixture | Diagonals measured and the frame checked for square and twist before it comes out of the fixture. This is the check in the photographs below |
| Angle and position check | The welded frame is checked against the drawing with workshop gauges and a square | Leg perpendicularity to the shelf plane, shelf pitch, and the castor mounting positions. A leg that is out here cannot be corrected after coating |
| Surface preparation and coating | Degrease, preparation, then powder coat to the agreed colour | Film thickness and colour against the approved reference, with recesses and edges checked for coverage |
| Assembly and castor fit | Castors and brakes fitted, shelves seated into the frame | Each unit rolled and loaded with the brakes checked, and the castor fixings checked for torque |
| Packing | Edge and surface protection fitted, then carton or crate according to the route | The packed unit is compared with the packing specification and the pallet is photographed before it is closed |
The welding and squaring stage is the one that decides how the cart feels when someone pushes it. Welding and assembly detail sets out how frames are held and checked, and the coating stage that follows is described in surface finishing.
Revisions That Skip New Tooling on Library Book Cart Wheels
Customising a cart is cheaper than it looks, because most of what a buyer wants to change moves a setting rather than a tool. The column on the right is the useful one – it is the part that stays stable while the rest changes.
| What can be changed | What it affects | What it does not affect |
|---|---|---|
| Cart length, width and shelf height | The bend program and the positions in the welding fixture | The frame construction itself, as long as the proportions stay sane |
| Shelf count and shelf pitch | Rail positions and the number of weld operations per frame | The castor specification, or the coating process |
| Tube section and wall thickness | Rigidity, the load the cart carries, and the material cost | The coating line or the packing method |
| Finish colour and gloss | The powder specification and the coating batch set-up | The geometry. Colour is applied after forming and welding, so it never changes the fit |
| Castor type: swivel, fixed, braked or a mix | Manoeuvrability, the mounting plate pattern, and how the floor is treated | The frame, provided the plate footprint is unchanged |
| Handles and push bars | The top frame geometry and the packed height | The shelf layout or the load rating |
| Your marking or identification | Where and how it is applied to the finished product | Nothing else. Artwork and marks remain your property and are used only on your goods |
Packing for Export
Cart frames are the awkward part of a shipment: they are long, they have corners, and the welded joints take a knock badly. Packing is matched to the route rather than to habit, since a carton that survives a truck is not automatically adequate for a container that is handled four times.
Edge protection, surface film and the carton are matched to how the goods travel; the export packaging guide covers the options and what each one is for. If your own packaging standard applies, send it with the enquiry and it will be used instead of ours.
Library Book Cart Wheels: Common Buyer Questions
Can the cart be shipped flat to reduce freight cost?
The welded frame is what gives the cart its stiffness, which is the opposite of a knock-down design – a bolted frame has a longer tolerance chain and more places for the wobble to come from. What is practical instead is to ship shelves as a separate sub-assembly with the fixings supplied, or to adjust the shelf pitch so more carts fit in the container. If freight is the driver, ask for both options priced side by side rather than assuming the knock-down version is cheaper.
How is the load rating decided?
By the shelf construction and by how the weight is spread, not by a single headline figure. A distributed load across a shelf behaves very differently from the same weight in one spot, and the legs and castors see different forces again when the cart is pushed rather than standing still. Tell us the load and how it will actually sit on the shelf, and the rating can be confirmed against the construction rather than quoted as a number.
What happens before a custom size or colour is produced?
A first article is made and checked against the drawing before the batch starts – the same discipline described in our inspection process. That is where a colour that does not match the reference, or a shelf pitch that does not suit the intended books, is still cheap to change. The sample and production windows for a standard cart are in the specification table above.
Next step. Send the drawing or describe the cart you need – length, shelf count, intended load and finish – through the RFQ form. Drawings are welcome and are handled under the confidentiality terms on that page.
A Loaded Book Cart Is Top-Heavy, and That Is the Whole Design Problem
100 kg of books on four shelves puts most of the weight above the middle of a cart that is 1100 mm tall and 600 mm wide. That is a tipping risk before it is a strength risk, and it is why double-sided carts are built the way they are: the wheelbase has to be wide enough relative to the load height that a loaded cart pushed over a threshold does not go over. A cart that is stable empty and unstable loaded is a real and common failure, and it is a geometry question rather than a material one.
- Shelf loading is uneven in practice. One side loaded and the other empty is the case that tips carts, and it is the case that should be specified.
- Braked castors are specified as two of four for a reason: two brakes are enough to hold a stationary cart and four make it awkward to position.
- Castor mounting is the joint that fails. A castor plate into thin tube needs a reinforced mounting, not just a plate.
Wire Mesh Shelves: Why the Weld Count Matters More Than the Wire Gauge
A wire mesh shelf is a large number of small welds, and it is the weld count rather than the wire thickness that decides how the shelf behaves. Every intersection is a joint, and a shelf that is stiff when new will develop a permanent sag if the joints at the middle of the span are not sound. The sag is progressive: a shelf that has taken a set holds more water in the dip, and books slid in and out of a sagged shelf wear the coating along the low line.
The mesh is powder coated after welding, which covers the joints, and the coverage at an intersection is the thinnest point on the shelf because of the geometry. If your library runs a humid environment or the carts go outside between buildings, say so at quote stage – the finish specification changes, and so does whether a solid shelf is a better answer than mesh for the bottom position. Lead time is quoted after drawing review and process confirmation.
Need a Similar Part?
Most enquiries that start on a page like this are not an order for Library Book Cart with Wheels — they are a search for a factory that can make something like it. Send us your drawing, 3D model or sample and we will review the manufacturing process and the quotation requirements, then come back with a process plan, a price and a lead time.
We work from 2D drawings, STEP / DWG / DXF / PDF files, or a physical sample if that is all you have.
No complete drawings yet? Describe the part, send photos or a sketch, or send a sample — we can start from there. Discuss your project.
Payment Terms
How a project is paid for is agreed before production starts, and the structure that applies to your order is stated on the quotation and on the order confirmation, so there is no ambiguity later.
- 30% advance payment with the order and the 70% balance before shipment — our standard structure.
- 70% advance payment with the order and the 30% balance before shipment — used for some projects.
- 100% payment in advance before production starts — used for some projects.
If your finance team works to a fixed structure, say so in the first enquiry and we will confirm what applies to your order before you commit. Request a quotation.
Questions buyers ask before sending drawings
The questions that come up most often before a project starts, answered the way we answer them by email.
What do you need from me to quote Library Book Cart with Wheels?
2D drawings as PDF, DWG or DXF, or 3D files as STEP, IGES or SolidWorks, together with material grade, sheet thickness, surface finish, quantity and destination country. If the drawing is not finished yet, send a photo, a sketch or the existing part instead — we review what can be measured from it and reply with the questions that still need answering.
How long does a quotation take?
Enquiries are answered within one business day. Simple laser-cut and bent parts are quoted within 24 hours. Welded frames, assembled units and multi-part structures are quoted after the drawing review and process confirmation, and the date is confirmed in our reply.
Is there a minimum order quantity?
Prototypes are made from a single piece and small batches of 10–50 pieces are routine. Prototype, first batch and repeat volume are quoted together so the numbers stay consistent as the project scales.
Can you work from a sample or a photo if I have no drawing?
Yes. Send the part itself, clear photographs with a rule or caliper in frame, or a dimensioned sketch. We measure what can be measured, list what is still undefined, and confirm it with you before production.
Trade Terms and Delivery
We quote under the standard Incoterms your logistics team already works with, and build the packing and documentation around the one you choose.
- EXW — you collect from our Ningbo facility and run export clearance through your own forwarder.
- FOB Ningbo — we deliver to the vessel at Ningbo port and handle export clearance.
- CIF — we cover carriage and insurance to your named destination port.
- DDP — we handle carriage, insurance, import clearance and duties through to your door.
Send your destination country, target delivery date and preferred trade term together with the drawing. Request a quotation.
Quotation Time
We quote from your drawings. How long that takes depends on what the part asks for:
- Simple parts — quoted within 24 hours. Laser-cut blanks and bent components, supplied with complete 2D or 3D drawings. Mon–Fri, GMT+8.
- Complex assemblies — quoted after the drawing review. Payment kiosks, multi-part welded frames, enclosures with purchased hardware, or anything needing a coating or assembly trial. We confirm a quotation date once the scope is clear.
Production lead time is quoted separately, after drawing review and process confirmation. Send your drawings.
What stands behind this quotation
- Manufacturing since 20162,500 m² Ningbo plant — 3 laser cutting machines (including newer TRUMPF), 4 CNC press brakes and 10 welding stations.
- Shipped to more than 30 export marketsEnclosures, cabinets and formed parts supplied to OEM buyers across Europe, North America and Asia.
- 123 documented product casesMedical device housings, HVAC and heat pump enclosures, agricultural and livestock equipment, industrial hydraulics, material handling trolleys and EV charging cabinets.
- Factory evidence you can checkTUV Rheinland audit reference MIC-ASI243729 and Bureau Veritas reference MIC-ASR263630 available for buyer review under NDA.
Before you send drawings: an NDA is signed on request · first-article inspection is carried out before a batch continues · pricing is staged from prototype quantity to repeat volume · pre-shipment photos and packing records are prepared when the project needs them.