REAL SHIPPING CASE STUDY

Sea Freight Shipping of Aluminum Windows and Quartz Stone Countertops from Shenzhen to Miami

This was a repeat shipment for a returning customer who had previously shipped similar building materials from Shenzhen to Miami. Based on the earlier shipment experience, Tonlexing arranged another LCL sea freight solution for three wooden cases of aluminum windows and quartz stone countertops.

Three wooden cases containing aluminum windows and quartz stone countertops prepared for sea freight from Shenzhen to Miami

ORIGIN

Shenzhen, China

Destination

Miami, USA

Method

Sea Freight

CARGO

Windows & Quartz Countertops

SHIPMENT OVERVIEW

Case Summary

This shipment included two types of construction materials with very different handling requirements. The aluminum windows needed protection against scratching, impact, and frame distortion, while the quartz stone countertops required stronger structural support due to their high density and risk of cracking.

The total cargo volume was not large enough to justify booking a full container. Therefore, LCL sea freight was selected to allow the client to share container space while maintaining suitable cargo protection.

Why LCL Sea Freight?

At 11.071 CBM, LCL sea freight was more practical than booking a full container. Reinforced wooden cases helped protect the heavy quartz countertops and aluminum windows during transit.

Route

Shenzhen → Miami

Mode

LCL Sea Freight

Shipment Size

3 Cases · 5,850 KG

Shipment DetailInformation
OriginShenzhen, China
DestinationMiami, USA
CargoAluminum Windows and Quartz Stone Countertops
HS Codes761010 and 681019
Packages3 Wooden Cases
Gross Weight5,850 KG
Cargo Volume11.071 CBM
Shipping MethodLCL Sea Freight
PackagingReinforced Wooden Cases
Total Shipping TimeApproximately 32 Days

CARGO HANDLING NOTE

Why Weight Distribution Mattered

With a total weight of 5,850 kg in only three wooden cases, this shipment placed a high load on a relatively small container area. Most of the concentrated weight came from the quartz stone countertops, while the aluminum windows required protection from pressure and impact.

During LCL consolidation, the cases needed stable floor-level placement and separation from unsuitable surrounding cargo. This helped reduce shifting, edge impact, frame deformation, and damage during repeated warehouse handling.

Weight Comparison

Gross Weight

5,850 KG

Cargo Volume

11.071 CBM

Packaging

3 Wooden Cases

Handling

Heavy & Fragile

CLIENT NEEDS

Client Requirement & Shipping Challenge

This was another shipment arranged for a returning customer. Tonlexing had previously handled an LCL sea freight shipment of aluminum railings and cabinetry from Shenzhen to Miami, giving our team useful experience with the customer’s route, destination requirements, and shipping preferences.

Weight and Structural Support

LCL Handling and Stowage

SOLUTION

Recommended Shipping Solution

Tonlexing arranged an LCL sea freight plan with additional controls for heavy and damage-sensitive cargo. The solution focused on suitable warehouse handling, protected container placement, and accurate customs documentation for the two product categories.

Heavy-Cargo LCL Booking

LCL space was booked with a warehouse able to receive dense wooden cases. Package weight, dimensions, and lifting requirements were confirmed before cargo delivery.

Protected Loading Arrangement

The quartz cases were kept stable at floor level, while the aluminum windows were separated from heavy surrounding cargo to reduce pressure, scratching, and movement.

Document & Packing Review

The two products were listed separately with HS Codes 761010 and 681019. Wooden-case markings, invoice details, and packing information were checked before export.

Service Note: For heavy LCL cargo, the dimensions and weight of each wooden case should be confirmed before booking. No-stack labels, forklift entry points, and compliant wood-packaging marks should also be checked before warehouse delivery.

CARGO HANDLING

Real Cargo Photos

The photo shows the three reinforced wooden cases before warehouse delivery in Shenzhen. The aluminum windows and quartz stone countertops were secured with external straps to help keep the cases stable during inland transport and subsequent LCL handling.

Three wooden cases containing aluminum windows and quartz stone countertops prepared for sea freight from Shenzhen to Miami

PROCESS

Shipping Process from Shenzhen to Miami

The shipment moved through six coordinated stages, from cargo review and warehouse receiving in Shenzhen to LCL deconsolidation and cargo release in Miami.

1. Cargo Review & Booking

We reviewed the cargo type, package dimensions, weight, HS Codes, and wooden-case condition before confirming the LCL booking.

2. Warehouse Receiving

The three wooden cases were delivered to the Shenzhen warehouse, where package marks, quantities, dimensions, and gross weight were checked.

3. Handling & Packing Check

The warehouse checked the case bases, forklift entry points, lifting stability, and visible exterior condition before consolidation.

4. LCL Consolidation

The cases were positioned at floor level and separated from unsuitable heavy cargo to reduce pressure, movement, and impact during transit.

5. Export & Ocean Transit

After document review and export customs clearance, the consolidated container departed from Shenzhen for Miami by sea.

6. Miami Deconsolidation

After arrival, the container was unpacked at the destination warehouse before customs clearance, cargo release, and onward delivery.

TRANSIT TIME

Transit Time & Service Notes

The ocean transit from Shenzhen to Miami was approximately 24 days, while the complete shipment took around 32 days.

The additional time covered several operational stages that are not included in the vessel transit alone:

  • Cargo delivery to the Shenzhen warehouse

  • LCL warehouse receiving

  • Container consolidation

  • Export customs clearance

  • Waiting for the scheduled vessel

  • Ocean freight transit

  • Container unloading and deconsolidation in Miami

  • Import customs clearance

  • Final cargo release

This distinction is important when comparing freight forwarder quotations. Some companies quote only the port-to-port transit time, while others provide an estimated total shipping time.

A reliable freight forwarder should clearly explain what is included in the stated transit time and which destination procedures may add additional days.

Factors That Can Affect Transit Time

  • Vessel schedule changes

  • Port congestion

  • Customs inspections

  • Incomplete commercial documents

  • LCL consolidation delays

  • Destination warehouse availability

  • Severe weather

  • Peak-season container demand

  • Importer clearance readiness

Shipping schedules are estimates rather than guaranteed delivery dates. Importers should allow additional time when the cargo is required for a construction deadline or installation project.

Customs & Compliance

Customs Preparation for Aluminum Windows and Quartz Countertops

Before departure, Tonlexing checked the product descriptions, supplied HS Codes, packing list, wooden-case details, and consignee information for this three-case LCL shipment from Shenzhen to Miami.

SUPPLIED HS CODE

761010 & 681019

761010: Aluminum windows
681019: Quartz stone countertops
Final U.S. classification should be confirmed by the importer or customs broker.

Tonlexing Actions Before Arrival

Practical customs note: Avoid declaring the shipment only as “building materials.” The commercial invoice and packing list should show the aluminum windows and quartz stone countertops separately, including their descriptions, HS Codes, quantities, values, weights, and package marks.

FAQ

Frequently Asked Questions

The shipment measured 11.071 CBM, which was not enough to require a full container. LCL sea freight allowed the client to share container space and reduce shipping costs.

Because the cargo was heavy and fragile, the wooden packaging and consolidation method had to be reviewed carefully before booking.

Yes. They can share container space when each product is packed securely and the loading arrangement prevents the heavy stone cargo from placing pressure on the aluminum frames.

The freight forwarder should confirm the weight, package dimensions, lifting method, and stacking restrictions before consolidation.

Air freight is faster, but it is considerably more expensive for cargo weighing 5,850 kg.

Quartz stone is extremely dense, making air freight costs difficult to justify for most building-material shipments. Sea freight provided a more cost-effective solution for this Shenzhen-to-Miami route.

Quartz stone countertops should be firmly supported inside reinforced wooden packaging.

Depending on their dimensions, they may require vertical support, internal bracing, shock-resistant materials, protective separators, and a strong wooden base. The objective is to prevent movement, impact, and concentrated pressure during handling.

Yes. Miami customs clearance and final delivery can be arranged when the importer provides the complete delivery address, ZIP Code, company details, cargo value, and required customs information.

The final service scope should be confirmed before shipment so that destination charges and delivery requirements can be included in the quotation.

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