---
title: "20ft Flat Rack Container Dimensions"
description: "20ft flat rack container specs: dimensions, capacity, & features for heavy-duty shipping. Ideal for oversized cargo."
url: "https://shippingcontainersofsouthampton.co.uk/container-dimensions/20ft-flat-rack-container-dimensions"
date: "2026-04-30T15:14:42+00:00"
language: "en-GB"
---

![Flat Rack Containers](https://shippingcontainersofsouthampton.co.uk/images/websiteimages/Flat-Racks_southampton4.jpg)

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 # 20ft Flat Rack Container Dimensions & Specifications

 Shipping Containers of Southampton stocks new and used 20ft flat racks for industrial projects across the South Coast. A flat rack is a specialised steel platform with no side walls or roof, designed to carry cargo that exceeds standard dimensions. These units are essential for moving heavy machinery or plant equipment that cannot be loaded into a standard box. Every unit meets ISO 668 standards, ensuring sizes remain consistent for global transport. You can [buy shipping containers](https://shippingcontainersofsouthampton.co.uk/buy-shipping-containers) directly from our regional inventory for permanent heavy-duty use.

A lead logistics assessor manages our operations with twenty years of industry experience. We maintain ISO 9001 quality management certification to ensure high service standards. Every flat rack we supply features a valid CSC plate. A CSC plate is a safety certificate regulated by the [International Maritime Organisation (IMO)](https://www.imo.org/en/About/Conventions/Pages/International-Convention-for-Safe-Containers-(CSC).aspx) that proves the unit is structurally sound for stacking and freight. For temporary site requirements, Shipping Containers of Southampton offers flexible [flat-rack container hire](https://shippingcontainersofsouthampton.co.uk/rent-shipping-containers/flat-rack-containers) from our local depot, ensuring rapid response times for commercial projects.

  ## Technical Specifications and Payload Data

Accurate logistics planning requires precise data. The 20ft flat rack offers a compact footprint with high structural strength. To plan your lift, you must understand the tare weight and maximum payload. Tare is the weight of the empty container. Payload is the maximum weight of cargo a unit can safely carry. Shipping Containers of Southampton provides these figures to ensure your site and transport equipment remain within safe limits.

 | Description | Metric Measurements | Imperial Measurements |
|---|---|---|
| External Length | 6.06 m | 19’ 10.5” |
| External Width | 2.44 m | 8’ 0” |
| External Height (Standard) | 2.59 m | 8’ 6” |
| Internal Length (Between Posts) | 5.62 m | 18’ 5” |
| Internal Width (Flush Floor) | 2.20 m | 7’ 3” |
| Base Height | 0.30 m | 1’ 0” |
| Tare Weight | 2,740 kg | 6,040 lbs |
| Maximum Payload | 31,260 kg | 68,860 lbs |

Most 20ft flat racks in our Southampton inventory feature collapsible end walls. This allows the units to be stacked when empty, reducing haulage costs. Check our complete [ISO container dimension guide](https://shippingcontainersofsouthampton.co.uk/container-dimensions) to compare these specialised units against standard 20ft containers.

  ## Industrial Applications in Hampshire

The open structure of the 20ft flat rack makes it the primary choice for heavy plant and industrial machinery. Because there are no side panels, you can load cargo from the top or the side using a crane or a heavy-duty forklift. Shipping Containers of Southampton supports various sectors with these units, ensuring oversized loads remain secure during transit.

- **Plant Machinery:** Secure transport for excavators, industrial generators, and heavy engines.
- **Construction Materials:** Moving structural steel beams and large pre-fabricated timber sections.
- **Marine Equipment:** Ideal for boat hulls and marine engines near the Port of Southampton.
- **Oversized Parts:** Shipping mechanical components that exceed the standard internal width of 2.35m.

![20ft Flat Rack Container](https://shippingcontainersofsouthampton.co.uk/images/websiteimages/Flat-Racks_southampton3.jpg)

If you need easier access for standard palletised goods, check our [specialist side-access units](https://shippingcontainersofsouthampton.co.uk/buy-shipping-containers). For oversized loads that require more length, we also provide [40ft container footprint measurements](https://shippingcontainersofsouthampton.co.uk/container-dimensions/40ft-flat-rack-container-dimensions) data for your technical planning.

  ## Logistics, Site Preparation, and Planning

Shipping Containers of Southampton delivers by HIAB to sites across Hampshire and the South Coast. A HIAB is a truck fitted with a hydraulic crane that lifts and places heavy units exactly where you need them. To ensure a safe delivery, the ground must be level and firm. We recommend concrete, tarmac, or compacted aggregate. Before your delivery, you should read our guide on [preparing your site foundation](https://shippingcontainersofsouthampton.co.uk/blog/shipping-container-foundations) to prevent the unit from settling unevenly or racking. Racking is a technical term for frame twisting that can prevent proper operation.

Our transport team uses satellite mapping to assess your site for overhead obstructions. We use a FORS Silver-accredited fleet to ensure the highest standards of safety. For a 20ft flat rack delivery, the HIAB vehicle requires at least 15ft of vertical clearance. Note that live power cables must be at least 20 metres away from the crane during safety operation. If you are placing the unit on a permanent site, check the [Southampton City Council Planning Portal](https://www.southampton.gov.uk/planning/) for local rules. You can also view our [local council planning rules](https://shippingcontainersofsouthampton.co.uk/blog/shipping-container-planning-permission) page for specific guidance on containers.

  ## Frequently Asked Questions

### Are 20ft flat racks suitable for international shipping?

Yes. Every unit we sell or hire is ISO-compliant and has a valid CSC plate. This ensures the unit meets the safety standards required for sea, rail, and road freight. If you intend to use the unit for export, [request a delivery assessment](https://shippingcontainersofsouthampton.co.uk/quote-form) and speak with our technical team to confirm compliance with safety regulations.

### How do I secure cargo to a 20ft flat rack?

The heavy steel frame of a 20ft flat rack includes multiple high-strength lashing points. These are designed to hold heavy-duty straps, chains, or wires in place to prevent cargo from shifting. We recommend checking the [twenty-foot equivalent unit (TEU)](https://shippingcontainersofsouthampton.co.uk/container-dimensions/20ft-shipping-container-dimensions) capacity to ensure your load sits securely within the lashing perimeter.

### Can I stack flat racks when they are empty?

Yes, if the end walls are collapsible. When the ends are folded down, several 20ft flat racks can be stacked together to equal the height of one standard 20ft shipping container. This bundling significantly reduces transport costs. You can [speak to our Southampton experts](https://shippingcontainersofsouthampton.co.uk/quote-form) for a quote on bulk orders.

### What type of flooring is used on a flat rack?

Our 20ft flat racks typically feature heavy-duty timber flooring or steel plating. Timber floors provide better friction for securing cargo and are easy to maintain. We suggest checking the floor condition if you are [buying cargo-worthy containers](https://shippingcontainersofsouthampton.co.uk/buy-shipping-containers) for very heavy industrial use. Find more care tips in our [container refurbishment and repair](https://shippingcontainersofsouthampton.co.uk/blog/container-maintenance-and-repair) guide.

  [Container Quote](https://shippingcontainersofsouthampton.co.uk/quote-form) **Tel: [0330 0130 636](tel:03300130636)** ## Why Shipping Containers of Southampton?

We provide the technical expertise and delivery precision that Hampshire businesses require. Our team ensures that every unit meets high-quality standards, backed by ISO 9001 certification. We use a FORS Silver-accredited delivery fleet to ensure your container is placed safely and accurately, even in challenging rural or urban environments. Whether you want to [hire a container for a Southampton business](https://shippingcontainersofsouthampton.co.uk/rent-shipping-containers) or buy a permanent unit, we offer reliable support and a wide range of stock. We also serve the wider region, including [shipping containers in Portsmouth](https://shippingcontainersofsouthampton.co.uk/areas-served/portsmouth/sales-hire) and [sales and hire](https://shippingcontainersofsouthampton.co.uk/areas-served/eastleigh/sales-hire) in Eastleigh.

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