40ft / 12m Dome Design

This Plan comes with two dome configurations!

Simple Geodesic Dome DIY Build Plans (Imperial and Metric). These plans include everything you need to construct your own dome or zome greenhouse, cabin, sauna, glamping / Airbnb, trellis, shade structure, off-grid bunker, or tiny house. Beginner woodworking plans. No specialty hardware, tools or hubs required.

$ 75 – $ 145

Plan

Just the Plans
Plans + 3D Model

Clear

Plan

Just the Plans
Plans + 3D Model

Clear

What's Included

What is included in the plans?
(1) Dome and Zome Builders Guide PDF
(1) Trillium Domes Build Plan – Imperial – PDF
(1) Trillium Domes Build Plan – Metric – PDF

Priority support from our team

What is included in the Sketchup 3D Model?

Opting for the Sketchup model allows you the ultimate freedom when exploring, scaling or altering your Trillium Domes project. Sketchup is a free program that will allow you to import every detail of your Trillium Domes design into a workable, digital space. This gives you maximum creative potential and a totally different view of your project. Many files include alternate designs never released as plans! Check the short video above in Model Specs to see a detailed view of what’s included in each specific model.

Dimensions

This plan contains two configurations

Configuration one:

Diameter – 38′ 6 7/8″, 11.757 m
Max Height – 17′ 2 5/8″, 5.248 m
Area – 1150 sq ft , 107 sq m
Dome Surface area – 700 sq ft , 65 sq m
Wall Surface area – 440 sq ft , 41 sq m

Configuration Two:

Diameter – 38′ 6 7/8″, 11.757 m
Max Height – 26′ 5″, 8.059 m
Area – 1150 sq ft , 107 sq m
Dome Surface area – 1150 sq ft , 107 sq m
Wall Surface area – 140 sq ft , 13 sq m

Materials

Configuration One:

Dome Frame
700 sq ft cover material / roofing / insulation / cladding
(175) 2x6x12′
(750) 3 1/2″ GRK R4 (or equivalent) Screw (1000) 3″ #14 Structural Lag Screw (Or 175 through bolt/nut)
Pony Wall

440 sq ft sheathing / siding (80) 2x6x10

Floor System – Radial System

(20) 2x10x16′ (Regular Joists)
(20) 2x10x12′ (Mid Span Joists)
(10) 2x10x12′ (Rim)
(22) 2x10x10′ (Blocking)
(10) 4x6x12′ (Outter Girder)
(3) 4x6x14′ (Inner Girders)
(40) 4×8 Sheets subfloor
(1500) screws subfloor
(13) Post and Base assemblies

Floor System – Conventional Frame

(55) 2x10x12′
(28) 2x10x16′
(40) 4×8 Sheets Subfloor
(1500) Screws Subfloor
(28) Post and Base Assemblies

Doorway

126 sq ft sheathing / siding / cladding
(15) 2x6x8(8) 2x6x10

Configuration Two:

Dome Frame

1150 sq ft cover material / roofing / insulation / cladding
(300) 2x6x12′
(1300) 3 1/2″ GRK R4 (or equivalent) Screw (1750) 3″ #14 Structural Lag Screw (Or 300 through bolt/nut)

Pony Wall

140 sq ft sheathing / siding (60) 2x6x8
Floor System – Radial System

(20) 2x10x16′ (Regular Joists)
(20) 2x10x12′ (Mid Span Joists)
(10) 2x10x12′ (Rim)
(22) 2x10x10′ (Blocking)
(10) 4x6x12′ (Outter Girder)
(3) 4x6x14′ (Inner Girders)
(40) 4×8 Sheets subfloor
(1500) screws subfloor
(13) Post and Base assemblies

Floor System – Conventional Frame

(55) 2x10x12′
(28) 2x10x16′
(40) 4×8 Sheets Subfloor
(1500) Screws Subfloor
(28) Post and Base Assemblies

Doorway

280 sq ft sheathing / siding / cladding
(46) 2x6x12

Additional Resources

⦁ Sign up for our email list to get your free Dome and Zome Builders Guide PDF! (Bottom of page https://trilliumdomes.com/)
⦁ Our FAQ (https://trilliumdomes.com/faq/)
⦁ Our Step-By-Step Video Guides (https://www.youtube.com/@trilliumdomes)
⦁ Looking to start your own business building domes and zomes? We can help! Check out our Trillium Domes Builders Collective and get in touch! (https://docs.google.com/document/d/105zpa5uQ5CVQungiD3odMVwjiguR5Q1nsL7On3DRv0Y/edit?usp=sharing)
⦁ Find the Materials and Equipment you need for your project! (https://trilliumdomes.com/equipmentmaterials/)
⦁ Stay updated day to day through our Instagram! (https://www.instagram.com/trilliumdomes)
⦁ Reach out to us about your project via our Contact Page! (https://trilliumdomes.com/contact-us/)

Sketchup 3D Model Preview

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NEED HELP ALONG THE WAY?

When you buy any Trillium Domes plan, you’ll get priority support from our team & access to our private Dome Builders Facebook Group

Ask Johnny and and the rest of the group any questions you might have about your build. Share your dreams, ideas, plans, techniques, and finished projects! Need 1-on-1 support? Shoot us a message and we’ll make sure to help however we can.