BackUp from Below

The Strut GTS + is a robust turnbuckle that allows you to reinforce and secure your GTS from below – so you get the most out of your Tree Screws!


incl. VAT plus shipping

In stock

In stock

✓ Made in Germany ✓ 5 Years Warranty ✓ 30 Days Return

Big dreams or soft trees

When does the GTS Tree Screw need to be reinforced? When the screw reaches its load limit. This can either be because you are building a very large and heavy treehouse. It can also be that you want to strengthen the GTS because your tree is very soft (poplar, willow, spruce, redwood, ...). Or you may decide to enlarge your treehouse after a few years. However, similar to the Cable Suspension from above, you can almost double the load capacity of your GTS Bolts with the Strut GTS +! Of course, you can also combine both methods if necessary.

More load capacity

More Safety
With the Strut GTS +, the load-bearing capacity of our large Tree Screws (Allstar, Top, Friend) can be almost doubled. From a static point of view, it doesn’t matter which system you choose, the Cable Suspension from above or the Strut GTS + from below. The advantage of the Strut GTS + is that the space above your support beam remains free.

Easy Installation

Anytime – Anywhere
The Strut GTS + can be mounted whenever you feel that your GTS needs more power. Depending on the GTS model and strut angle, the anchor point is about 50 cm vertically below the bolt to be reinforced. You are free to choose where you place the ring on the shaft, but we recommend mounting it on the very outside for a maximum triangle of force.

Turnbuckle ø 35 mm

Wedged in firmly
The Strut GTS + is anchored vertically under the GTS in the tree with the GTS Safety. In case of heavy one-sided loading, the construction can also be moved slightly to the side for better load bearing. Use a thick screwdriver to turn the turnbuckle and wedge the prop firmly in place!

What is delivered?

1 × Strut GTS +

        • GTS Safety (incl. Nut M30)
        • Turnbuckle (ca. 600 mm = 23,6 in total lenght)
Product Details
  • Certified DIN quality steel
  • Special steel alloy (shaft not weldable)
  • Maximum clamping travel: 110 mm (4,33 in)
  • The set can be retrofitted at any time.

Compatible with / for amplifying:

Technical Data
  • Dimensions:
    • Total length ring centre-ring centre approx. 530 – 630 mm (stretched out straight 20,8 – 24,8 in).
    • Length of turnbuckle (without connections) 340 mm (13,4 in)
    • Thread length / maximum clamping travel: 2 × 55 = 110 mm (4,3 in)
  • Clamping hole ø 12.0 mm (0,47 in)
  • Internal thread M24 l/r
  • Ring large for shaft GTS ø 40 mm; Ring small for shaft Safety ø 30 mm
  • Total weight: 4250 g (incl. GTS Safety)
  • Article no.: TTS3001
  • HS-Code (customs): 73089098
  • Shoe size 43.5
  1. Unscrew the nut from the large GTS, slide on the ring and screw the nut back on hand-tight.
  2. Close the turnbuckle: screw both connections into the turnbuckle up to 1 cm.
  3. Place the lower small ring in the desired position vertically under the large GTS.
  4. Pre-drill a 145 mm deep hole with a 24 mm Auger-Bit.
  5. Screw in the GTS Safety with a 1″ Ratchet.
  6. Tighten the turnbuckle firmly – done!

Installation Instructions

PDF Download

Assembly Video

YouTube Tutorial


Shipping Service

Delivery times, prices, returns


Hardware Info

Please read!

Frequently Asked Questions

When do I use Strut GTS + and when Cable Suspension?

Both systems are based on the GTS Safety as an anchor bolt and reinforce the GTS to the same extent. Both can be retrofitted and are easy to adjust. The Strut GTS + gives you complete freedom above the support with the bearing beams, which is great if there is a wall there, for example.

In some cases, the tree dictates the reinforcement method anyway, so you can’t mount a Strut GTS + below it because there is a large branch.

Triangular construction – Which GTS do I reinforce?

In a vertically loaded triangular construction, from a static point of view it is usually irrelevant whether the upper or the lower GTS is strengthened, because ideally it is an inherently stiff construction.

However, if the upper cross beam is heavily loaded and bends, a large part of the load is transferred to the lower GTS via the struts. In the case of 3D triangles, the lower GTS also tends to be loaded more by the struts, but this is also pressed into the tree and is therefore already more load-bearing.

The upper GTS, on the other hand, is sometimes loaded with leverage in tension – here a Cable Suspension would make more sense, as it wants to keep the screw in the tree, whereas the Strut GTS + tends to be in the tipping point.

As you can see, you can’t generalise. The best thing to do is to draw a sketch with your platform, the Tree Screws and the prevailing load. Draw force arrows indicating which GTS is loaded where and choose a suitable reinforcement accordingly.

Can I attach several reinforcements to one GTS?

Of course you can also reinforce your GTS (Allstar, Top or Friend) with several ropes and 2 Strut GTS +.

However, it often makes more sense to relieve the load on a Tree Screw by specifically supporting the adjacent parts of the platform with struts (Strut Support Safety or Strut Support GTS) or by using a free rope suspension (GTS Safety or Tree Loop around branch) from above.

Hi treehouse friends!

We will be happy to help you! Please check our FAQ section first – there, we have already answered the most common questions for you.

In order to be able to advise you optimally, we need:

  • Sketches (drawn by hand is OK)
  • Position and height of the platform
  • Position and size of the treehouse
  • Photos of the trees
  • Tree diameter ø at the height of the platform
  • Tree species
  • Distance between trees (if more than one)
  • Use of the treehouse (many people, public, …)
  • Particularly stormy or snowy region?


“Since I often hang in trees or work with loud machines, it's best to contact me via email. The more concrete your idea and the more detailed the description, the better I can help you – thank you!”

Vitus Wahlländer - Owner of TheTreehouse.Shop

+49 17623339648

Dürnbachstraße 16a, 83727 Schliersee, Germany

Kontaktiere uns!

Gerne helfen wir Dir weiter. Bitte check vorher unseren FAQ-Bereich, dort haben wir die gängigsten Fragen bereits beantwortet.

Um Dich optimal beraten zu können, benötigen wir:

  • Skizzen (gerne von Hand gekritzelt)
  • Lage und Höhe der Plattform
  • Position und Größe des Baumhauses
  • Fotos von den Bäumen
  • Baumdurchmesser ø auf Höhe der Plattform
  • Baumart
  • Abstand der Bäume (falls mehrere)
  • Nutzen vom Baumhaus (viele Personen, öffentlich, …)
  • Besonders Sturm oder Schneereiche Region?


„Da ich oft in den Bäumen hänge oder mit lauten Maschinen arbeite, kontaktiere mich am besten via E-Mail. Je konkreter Deine Idee und je detaillierter die Beschreibung, desto besser kann ich Dir weiterhelfen – Danke!“


Vitus Wahlländer – Chef 

+49 17623339648

Dürnbachstraße 16a, 83727 Schliersee, Deutschland

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