XXL Tribeam Attachment Kit, D90 GTS+
Premium Fastening for XXL Treehouses – Tribeam Load Capacity up to 8,000 kg
✔ Bombproof anchoring for large platforms
✔ Recommended for trunks from ø 40 cm
✔ Wide contact surface and span up to 6 m
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XXL Triangle Kit – Product Details
Products included in the set
Product dimensions
All dimensions and details can be found on the respective product pages:
GTS Allstar 2.0:
Load Capacity - Set XL
- in softwood up to 4 tonnes*
- in hardwood up to 8 tonnes*
* Important: The actual load capacity depends on many factors, e.g. lever arm, load direction or wood strength. Always calculate with a safety factor!
Please read the following pages:
Assembly instructions & video
To install the GTS Screws, a hole must be pre-drilled in the tree – you can find the right installation tools in our shop.
Detailed step-by-step instructions can be found on our YouTube channel.
Shipping & Delivery
Great hardware! Great shop! Great advice! Great guy! Thanks Vitus and team! Even returning the spare screw after some initial confusion with the post was no problem!
It was a good purchase, the supports look fantastic, the explanations and advice were perfect, shipping to Spain was very fast, I will definitely buy them again!
Maximum Load Capacity for Your Treehouse with 3D Support Structure
The set is unbeatable in terms of strength and guarantees maximum safety and load capacity even for large constructions with spans of up to 6 m (19.7 ft) – perfect for heavy luxury buildings and public projects with high safety standards. It also provides improved stability and safety for softer trees such as spruce, fir or poplar.
How it works – triangle mounting
Which GTS should be reinforced?
Which of the two GTS screws in the triangle is reinforced with the BackUp system depends on the construction and the load.
The decisive factor is: Where do the forces act – and which GTS screw bears most of the load? This is the one that should be reinforced. As a rule, it is the lower screw at the tip of the triangle that is subjected to the highest load.
Stiffening triangles
For spans over 4 m (13.1 ft) and high loads, the triangle should be reinforced with additional struts and cleats. This reduces the buckling length of the wooden beams and increases rigidity and load capacity.
More on this in Step 9: Support Structures
Attach 3D-Tribeam
- Dreieck samt Halterungen am Boden vorbereiten.
- Obere GTS-Schraube in den Baum drehen.
- Dreieck aufschieben und exakt ausrichten.
- Unteres Bohrloch markieren und zweite GTS-Schraube eindrehen.
- Dreieck mit Positions-Ringen final befestigen.
Our solutions for large, heavy treehouses
This XXL Tribeam Kit is ideal if you want to play it safe – whether for a heavy luxury treehouse, a public project or soft wood. The GTS+ BackUps can also be retrofitted if you need more load capacity later on.
Successful XXL projects
Go big AND feel at home! Some of our professional customers have built their treehouses according to this motto – here you will find truly luxurious treehouse dreams to marvel at and replicate!
Ask the Treehouse Pro
Need help? I'd be happy to advise you – but please check our FAQs first, as most questions are answered there ;)
What is the load capacity of GTS Screws?
GTS Screws are designed for extreme loads of up to 4 tonnes. The exact load capacity depends on the following factors:
- Wood strength of the tree
- Lever arm (distance at which the beam bracket is mounted)
- Load direction and type (static or dynamic)
You can find all the details here:
- German Treehouse Screw GTS
- And in our nerd blog
How thick do my wooden beams need to be?
That depends on the span, the load and the area of application. You can find all the details in our Step 11: Timber guide.
How do I connect the wooden beams?
For stable connections of the floor joists, we recommend partially threaded screws:
- Up to 160 mm in length: stainless steel screws (ø 6–8 mm)
- From 160 mm: galvanised screws (ø 6–10 mm)
Joints can be made smooth. Secure heavily loaded areas with full thread screws, angle brackets or PU glue.
You will find everything you need to get started in our Wood Screw Pack.
What is the difference between German Treehouse Screw, Garnier Limb & TAB?
Treehouse screws are available from various manufacturers:
- GTS - German Treehouse Screw (TheTreehouse.Shop, Germany)
- Garnier Limb (Michael Garnier, USA)
- TAB - Treehouse Attachment Bolt (Pete Nelson, USA)
The first tree bolts were developed over 25 years ago in the USA. They all work on the same principle, but differ in dimensions, quality, price and product service (know-how, advice).
TheTreehouse.Shop is the only manufacturer in Europe – and the GTS 2.0 is the most advanced tree bolt on the market:
✔ Advanced thread 2.0
✔ Optimised metric dimensions (mm)
✔ Fast spare parts supply
✔ Direct shipping from Germany
Important: The manufacturers' systems are not compatible with each other!