Double-Tier Supermarket Shopping Cart — High Capacity with Silent Swivel Casters

Custom made

Core Advantages

    Double-tier capacity – Upper basket volume: 40 to 60 liters. Lower basket volume: 60 to 100 liters. The two-tier separation allows different weight or type of products to be stored on separate levels, reducing compression damage to lower-tier goods from upper-tier loads.

    Silent swivel casters – All four casters are swivel type with double ball bearings. Wheel surface material is TPR (thermoplastic rubber) or polyurethane. On tile or epoxy floors, measured rolling noise ranges from 45 to 55 dB when empty at 3 km/h. Four-wheel swivel design allows 360-degree in-place rotation, suitable for narrow aisles.

    Nesting storage – Nesting slots are built into the rear of the cart. The push handle of the preceding cart inserts into the nesting interface of the following cart. Ten nested empty carts occupy a total length of 1.3 to 1.6 times the length of a single cart, reducing the retrieval aisle footprint.

    Maneuverability – All four wheels are swivel casters, reducing the turning radius to half the diagonal length of the cart body, approximately 40% less turning space required compared to traditional carts with front swivel and rear rigid casters.

Product Features

    Frame material – Q195 or Q235 carbon steel round tubing, diameter from 16 to 22 mm, wall thickness from 1.2 to 1.5 mm.

    Basket material – Carbon steel wire, diameter from 4.0 to 6.0 mm, welded spacing from 50 to 80 mm. Support posts connect the upper and lower baskets.

    Surface finish – Electrostatic powder coating or hot-dip galvanizing. Coating thickness from 60 to 80 microns. Colors available in silver gray, dark gray, blue, red, or specified RAL codes.

    Caster specifications – Four swivel casters, diameter from 125 to 150 mm. Wheel core: double ball bearings. Wheel surface: TPR or polyurethane. Brake function available per wheel (optional).

    Nesting method – Vertical nesting at an angle of 10 to 15 degrees. The nesting lock is located at the bottom of the lower basket on the rear cart, mechanically engaging with the front cart's push handle.

    Handle height – 900 to 1050 mm above the floor.

    Load capacity – Upper basket rated load: 20 to 30 kg. Lower basket rated load: 50 to 70 kg. Total cart load not exceeding 100 kg.

    Empty cart weight – 15 to 22 kg (excluding packaging).

    Child seat (optional) – Located between the push handle and upper basket. Seat load capacity: 15 to 20 kg. Includes a safety belt.

    Lower basket ground clearance – 200 to 250 mm, reducing bending depth when placing heavy items.

Application Scenarios

    Household shopping in supermarkets requires the separation of fresh produce and dry goods.

    Warehouse club stores for two-tier transport of fragile and heavy products.

    High-capacity customer self-service shopping in convenience stores.

    Farmers' markets for the layered transport of vegetables, fruits, and packaged foods.

Frequently Asked Questions and Precautions

Frequently Asked Questions

Q: Do all-swivel casters make straight-line pushing difficult?
A: The cart relies on directional inertia during pushing. When pushed above 2 km/h on flat floors, the cart self-aligns. At low speeds (below 1 km/h) or for in-place turning, four swivel casters provide greater maneuverability. For enhanced straight-line stability, a rear rigid caster version is available as an option.

Q: Does the double-tier design interfere with nesting?
A: The nesting mechanism is located between the lower basket bottom and the push handle. The double-tier design does not interfere with nesting interfaces. During nesting, the upper basket tilts slightly forward with the cart body but does not contact the following cart.

Q: Can the upper and lower baskets be removed independently?
A: The baskets and support posts are connected via welding or bolts. The standard configuration is a one-piece structure without independent removal. For split transport or basket replacement, a bolt-connected detachable version can be specified.

Precautions

    Do not place single heavy items exceeding 10 kg (e.g., large cooking oil containers) in the upper basket, to avoid wire deformation or support post bending.

    The lower basket has low ground clearance. Do not place items extending beyond the front edge of the lower basket (e.g., pipes, long-handled tools) to avoid floor or caster contact during turns.

    When nesting, fully insert the front cart's push handle into the bottom of the rear cart's nesting slot. Only release after an audible click is heard.

    Protect caster bearings from corrosive liquids (bleach, strong acid cleaners). Contact will cause bearing rust or seizing.

    Inspect swivel caster return characteristics monthly. Push the cart 3 meters and release. The cart should stop naturally within 2 meters and maintain straight direction. Continuous yaw indicates caster verticality or bearing issues requiring inspection.

    This shopping cart is not intended for slopes exceeding 5 degrees, as fully loaded four-swivel-caster configurations may experience lateral drift.