L Treehouse Hardware Kit for 1-2 Trees, Tribeam V60
Attachment Kit for Treehouses – Angle 60 to 120°
✔ Flexible Tribeam Support Structures for Medium-Sized Treehouses
✔ For platforms up to 15 m² (1 Tree) or 30 m² (2 Trees)
✔ Recommended Trunk Diameter: from 45 cm (1 Tree) or 35 cm (2 Trees)
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L 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 L
- in softwood up to 5 tonnes*
- in hardwood up to 10 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!
Lateral lever forces on the GTS Friend must be avoided, especially in softwood!
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 appropriate installation tools in our shop.
Detailed step-by-step instructions can be found on our YouTube channel.
Shipping & Delivery
The flexible Tribeam Kit for ambitious builders!
This Tribeam Kit L is the perfect way to start building a full-size treehouse.
While the smaller kits (XS, S and M) are more suitable for children's projects, light playhouses and thin trees, the kits from size L upwards allow you to build larger, more stable platforms – the perfect place for a real treehouse.
How it works – triangle mounting
Variable triangle angle
Unlike the Solid Tribeam Bracket with a closed back wall, the Vario Bracket allows you to choose the strut angle freely – from 60° (steep) to 120° (flat).
This makes it easy to avoid thick branches and gives you even more flexibility in designing your platform.
Check lever forces
Important note: The GTS Friend (as the lower screw) can only withstand low horizontal loads – especially in softwood.
If there is heavy lateral loading or a long lever arm, you should use the larger GTS Allstar at the bottom instead!
Attaching the triangle
- Prepare the triangle and beam bracket on the ground.
- Screw the upper GTS Screw into the tree.
- Slide on the triangle and align it precisely.
- Mark the lower drill hole and screw in the second GTS Screw.
- Secure the triangle with the Position-Rings.
The right fastening for every treehouse project!
This Treehouse Kit in size L is ideal for small to medium-sized projects – from large children's playhouses to compact treehouses.
Our recommendation: If your tree allows it and has a trunk diameter of 40 to 45 cm, use the GTS Allstar instead of the GTS Friend – it is significantly more resilient to leverage, rotational and horizontal loads.
Successful projects
Our customers love the triangles – because they allow you to make all your treehouse dreams come true.
Here, for example, is the winning treehouse by Karl Krull – from our DIY competition in 2024!
Since 2020, we have been celebrating our beloved photo/video competition every year at the turn of the year! For us, it's the highlight of the year – maybe next time we'll see YOUR own treehouse ;)
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 ;)
Which Tribeam Bracket – Variable or Fixed?
A variable Tribeam Bracket is ideal for lighter treehouses with overhangs – the angle is freely adjustable (60° to 120°) and gives you plenty of design freedom.
Our recommendation:
If you do NOT need the adjustable angle, we always recommend the Solid Tribeam Bracket with a 90° angle. The resulting 45° struts ensure optimal force distribution and are easy to cut to size – machine angle 45° = perfect! In addition, the continuous rear wall is more stable and the installation of 3D struts is much easier.
Crooked tree? Build yourself a test triangle!
Slight inclines of less than 6° are usually not a problem – it is important to keep the lever forces low and to align the main load so that the tree cannot tip over.
DIY tip: For crooked trees, build a test triangle out of wooden slats in advance and hold it in the tree – this will allow you to see immediately whether the triangle will fit your tree bolts later on.
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 additionally with full thread screws, angle brackets or PU glue.
You will find everything you need to get started in our Wood Screw Pack.