Structural Kit

40' Double-Wide Shipping Container Connection Kit with Weld-Free Header - BETA 1.0

Container-specific parts and accessories for shipping container repairs, upgrades, and modifications.

Built for container repairs, upgrades, and modification work.
Confirm fitment, install location, and requirements before ordering.
Ask TCG for help matching the part to your container or build.

Container partConfirm fitmentShips to customer

Selected price $5,495.00

In stock

Style Required

Welded (Does Not Include 4 Long Bridge Fittings) $4,995.00 Weldless (Includes 4 Long Bridge Fittings) $5,495.00

Quantity

Checkout and fulfillment are handled by Container Modification World. TCG is an authorized dealer and can help confirm fitment before you order.

Need help matching this part?

Sold by The Container Guy. Fulfilled by Container Modification World.

TCG authorized dealerContainer-specific parts

CMW fulfillmentParts orders fulfilled by CMW

Built for containersFitment and use-case guidance

Ships to customerOrder online or ask for help

What it does

Confirm the right part before it ships.

Container parts are practical pieces of a larger build. Use the specs, photos, and fitment notes to confirm the product matches the container, jobsite, and install plan.

Solves the job

Use this part when it solves a specific repair, upgrade, security, storage, or modification need.

Check fitment

Confirm container size, install location, variant, and any site-specific constraints before ordering.

Ask before guessing

If the part touches structure, electrical, weather-tightness, or safety, ask The Container Guy before the work starts.

Specs and fitment

Category Structural Kit

Brand Container Modification World

Variant Weldless (Includes 4 Long Bridge Fittings)

SKU CMW-4K-740-1764

Install notes

Confirm variant, container size, and install location before ordering.
Use the correct fasteners, sealant, and trade support for the part and the container condition.
If the part affects weather-tightness, electrical, structure, lifting, or safety, confirm requirements before work starts.

Double-Wide Shipping Container Connection Kit with Weld-Free Header

Transform two 40 ft High Cube (New/One Time Use) shipping containers into one spacious 40' x 16' structure with our Double-Wide Connection Kit.

Designed for strength and easy installation, this weld-free header system lets you safely join two sea cans into a single open space.

Whether you're building a container home, storage facility, garage, or workshop, this kit provides a professional structure!

What’s Included:

Double-Wide Header Kit with hardware
Pre-cut steel components for top and bottom connections
Ridge cap and end caps for a weatherproof seal
Step-by-step install guide (video and written instructions)

Installation Requirements:

Compatible with High Cube 40 ft shipping containers
Sidewalls must be safely cut out (tools not included)
A level foundation or base is needed
Additional framing/insulation sold separately

Why Go Double-Wide?

More Interior Space – Double your floor area to 40' x 16'
Weld-Free Header – Our bolt-together header connection system simplifies installation.
Stronger, Seamless Join – components ensure a secure, weather-tight seal.
Multi-Use Potential – Ideal for workshops, garages, storage units, and tiny homes!
Add-On Ready – Compatible with spray foam insulation, and wood or steel stud framing.

Important Requirements

Both containers must be the same height.
Use two containers of the same brand/model for best fit and alignment.
Containers must have 60mm top tubing.
(See product images for visual reference: “CONTAINER MUST HAVE TOP TUBING”)

No Returns or Refunds

This is a made-to-order product with a 4-6 week lead time.
All sales are final—please confirm compatibility before purchase.

For Professionals Only

This is not a DIY kit.
Requires advanced knowledge of structural work and container installation

Must be installed by an experienced handyman or contractor

Frequently Asked Questions (FAQ)

Q: Can I use two different container brands?
A: No. We strongly recommend using two containers from the same manufacturer to ensure proper alignment and fit.

Q: What if my container doesn’t have top tubing?
A: This kit will not work without 60mm top tubing. If you're unsure whether your container qualifies, please contact us with photos before purchasing.

Q: Is this kit suitable for first-time builders?
A: No. This product is intended for professionals or experienced builders only. Improper installation may result in safety risks or structural failure.

Q: Can I return the kit if it doesn’t fit my container?
A: Unfortunately, no. Due to the nature of this product, all sales are final.

Questions?
Not sure if your containers qualify? Contact our team before ordering. We are happy to help ensure a smooth installation.