Step By Step: Joining Two 40FT Shipping Containers Together!

Ever thought about turning two 40-foot shipping containers into one spacious 16-foot-wide envelope—perfect for a home gym, shop, warehouse, or off-grid shelter? We have, twice! , In this video we walk you through the entire build process using our fully redesigned, DIY-friendly Weldless Double Wide Kit.

This isn’t just an updated version—it’s our most refined, code-conscious system to date. Engineered for easy bolt-together installation and stronger performance, it’s built for DIYers, builders, and container pros alike.

Why This Kit?

- Packs down to a single 4 ft pallet for easy, affordable shipping
- Stronger, straighter 4 ft structural headers
- Perfect hole alignment = faster, easier install
- LVL-compatible for extra strength
- Flush-fit connectors and ridge cap for a clean, finish-ready interior

What You'll Learn in This Build:

- How to choose the right containers for a double-wide
- How to prep, align, and connect two containers
- Best tools & techniques for cutting and reinforcing sidewalls
- How to strengthen floors between containers
- How spray foam + steel or composite framing assists with finishing

*Our Weldless Double-Wide Header Kit is designed for a fully bolt-together upper structural connection-no welding required. However, joining the container floors may require welding or other reinforcement methods, depending on your local building codes and intended application.

CHECK OUT THE DW KIT HERE: containermodificationworld.com/40ft-double-wide-kit

20’ DW KIT COMING SOON!

Like, comment, and subscribe for more in-depth container builds and DIY kits!

Hope Ya Learned Somethin'

TIMESTAMPS:
0:00 - Intro: DIY Double-Wide Shipping Container Kit
0:31 - Choosing the Right Shipping Containers
1:05 - Prepping Containers for Modification
2:08 - Underside Insulation Prep
2:40 - Assembling the Double-Wide Header Kit
3:21 - Installing the Double-Wide Header Kit
6:30 - Overview of Double Wide Kit Components
7:17 - Cutting Sidewalls Safely (Best Tools + Tips)
7:55 - Dropping Sidewalls and Joining Containers
9:40 - Installing Ridge Cap and End Caps
12:39 - Pitched Roof Option
13:06 - Framing and Insulation Prep (Spray Foam Ready)
14:05 - Pro Tips: Residential Framing, Thermal Bridging, Spray Foam
15:26 - Interior Finishing & Tour
16:00 - Final Construction Summary and Takeaways
17:00 - Subscribe + Learn More at TCG.ca

Other Featured Products:

Wall & Door Flashing Kits:

Wall Flashing Kit: https://containermodificationworld.ca/products/wall-flashing-kit-1?_pos=1&_sid=bfc1e61f4&_ss=r

Door Flashing Kit: https://containermodificationworld.com/door-flashing-kits

DOORS:

36" Man Door: https://containermodificationworld.com/composite-man-door-and-frame

FRAMING:

Steel Stud Framing Brackets: https://containermodificationworld.com/aluminum-ssb-corner-casting-cover-kits

Composite Framing Brackets: https://containermodificationworld.com/composite-steel-stud-framing-brackets

Social Media:
TCG Official Site: https://thecontainerguy.ca
Instagram: TheContainerGuyTV & ContainerModificationWorld
TikTok : TheContainerGuy
Facebook: The Container Guy

SHOP OUR OTHER PRODUCTS ON AMAZON (USA & Canada)

Patio Door Framing Kit:
Amazon:
https://amzn.to/4h7iB7M
Shopify:
https://containermodificationworld.com/sliding-patio-door-frame

FRAMING BRACKETS:
Interior Wood Stud Framing Brackets
Amazon:
https://amzn.to/46CbaAB
Shopify:
https://containermodificationworld.com/int-wood-stud-brackets

Steel Stud Framing Kit for 20' Shipping Containers -
Amazon:
https://amzn.to/3Q3iGy4
Shopify:
https://containermodificationworld.com/aluminum-steel-stud-brackets

CONTAINER PADS:
Amazon:
https://amzn.to/4hu0lqa
Shopify:
https://containermodificationworld.ca/products/container-pads?_pos=1&_psq=pads&_ss=e&_v=1.0

WOOD STUD FRAMING BRACKETS:
Exterior Wood Framing Bracket Kit – 2 Way Upper Decker Brackets – 20FT Kit
Amazon:
https://amzn.to/48GlYzG
Shopify:
https://containermodificationworld.com/ext-wood-framing-bracket-kits

Exterior Wood Framing Bracket Kit – 2 Way Upper Decker Brackets – 40FT kit
Amazon:
https://amzn.to/46Bvt1c
Shopify:
https://containermodificationworld.com/ext-wood-framing-bracket-kits

CONTAINER SECURITY:
Lock Box w/ CMW 80mm Lock:
Amazon:
https://amzn.to/3LRgUhU
Shopify:
https://containermodificationworld.com/80mm-cmw-shackle-lock

Universal Lock Box for Left and Right Hand Doors
Amazon:
https://amzn.to/3ZIMIv8
Shopify:
https://containermodificationworld.com/universal-lock-box-with-lock

VENTILATION:
Big Air Passive Vents:
Amazon:
https://amzn.to/48I9tDx
Shopify:
https://containermodificationworld.com/bigair45-vents

WINDOW FRAMING KITS:
42" x 30" Side Wall & 48" x 30" End Wall
Amazon:
https://amzn.to/45jXrxs
Shopify:
https://containermodificationworld.com/48x30-end-wall-window-framing-kit
https://containermodificationworld.com/42x30-side-wall-window-framing-kit

Channing's Tool Belt: https://holstery.com

**As an Amazon Associate, we earn from qualifying purchases.
-------------------