Crown bracing systems
GEFA crown bracing systems can hold damaged branches and prevent property damage and personal injury. The installation of the systems is done without injury to the tree, so its natural habitus is preserved. The extensive product range offers tested, state-of-the-art security. Break indicator threads serve as an early warning system and control option when assessing the condition. They tear at approx. 80% of the maximum breaking force.
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Specialist Dipl.-Kfm. (FH) Michael ThönissenThe Business Administration graduate is your contact for purchasing matters and regarding all queries on our range of tree top securing products.
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Tree Crown bracing: safety and prevention for people and trees.
GEFA crown bracing provides support for damaged branches and prevents property damage and personal injury. The systems are installed in the tree without injury. Its natural habit is retained.
What is crown bracing?
Branches at risk of breaking are posing a danger - parts of the crown falling suddenly can damage parked vehicles or buildings, and in the worst case even injure people. Crown security systems from GEFA Fabritz provide legally compliant and permanent protection.
Preserved city trees
Trees add value to an urban environment. They filter fine dust and pollutants, improve the microclimate and beautify the cityscape. In addition, they represent a considerable economic investment. The preservation of established trees is consequently the focus of tree care measures. If damage to the tree can be seen, a crown protection is the efficient alternative to pruning or even felling.
GEFA Fabritz Tree Crown bracing
At GEFA Fabritz GmbH, we develop high-break solutions for securing crowns. We have been running crown safety systems since 1990 and are continuously optimizing our range. Today we can cover loads of up to 20 t. Our hollow ropes, belts and loops are strong and extremely durable. The efficiency of our crown lock has been repeatedly confirmed in independent test series.
From our experience we know: every tree is different. That is why we develop crown locks that comply with the current rules and regulations and at the same time do justice to the individual case. We deliver our hollow ropes and straps on rolls in 25, 50 or 100 m. Individual cutting on site gives the arborist maximum freedom when installing the crown protection.
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Dynamic vs. static crown securing
• Dynamic crown protection (movement limitation) prevents vibration-related overloads in the crown. Our elastic straps and hollow ropes with 4 or 7 t breaking strength allow the tree to move and stimulate compensatory growth. The elastic ropes and belts act as a preventive measure against breakage in the case of noticeably weakened or heavily stressed trees.
• The static crown protection, also known as load-bearing protection or fall protection, stabilizes in the event of a cracked bobbin. Our webbing straps and hollow ropes with Dyneema up to 20 t breaking strength fix permanently and prevent already damaged tree parts from tearing further.
Hollow ropes
In our range for securing crowns, we have many intermediate sizes as well as ropes with higher breaking strengths for individual tasks. Hollow ropes can basically be installed as a one-component system with friction protection, or as a multi-component system, for example with loop straps. We cover the range of 2 - 10 t breaking strength with classic ropes made of polyester (green material identification thread) and a more stretchable polyamide variant (blue material identification thread). Both have white break indicator threads for early warning. The hollow ropes made of Dyneema are made of 20 braids and cover a breaking load of 12 or 20 t. With their minimal stretch, they are ideal for static crown securing. For technical reasons, Dyneema hollow ropes do not have breakage indicator threads.
Crown protection installation
To install the crown safety device, please observe the relevant installation instructions, safety regulations, controls and liability exclusions for material / legal defects by GEFA Fabritz GmbH
As an aid you need: splice awl, special adhesive tape, special scissors. Lashing straps prevent the loop tape from slipping off smooth branches and stems. Please refrain from introducing foreign material into the hollow rope. This can lead to weak points in the canopy protection and to a reduction in the breaking force.
GEFA hollow ropes are all braided plastic ropes without a rope core. The tube shape facilitates the splicing process with which the connection is made.
Product properties
• Braided plastic ropes without a rope core • Lightweight and durable • Stable connections via splice for maximum security • Higher initial breaking strength due to the number of fibers and the type of braiding • Made in Germany • Different expansion variants • Breakage identification thread for early detection • Special protective hose GEFAprotect®
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Visibly safe: break indicator threads
As an early warning system, break indicator threads are integrated into the GEFA webbing straps and hollow ropes (except Dyneema). They tear at about 80% of the maximum breaking force. In the contrasting white color, they give a clearly visible signal during the annual condition assessment of built-in crown safety systems. Incidentally, torn break indicator threads do not affect the breaking strength. Indicator threads that are not torn do not release you from the obligation to monitor. Even if there are still no breakage threads, we recommend, based on the current state of knowledge, replacing the GEFA crown safety device after eight years.
Hollow ropes specifications
• Hollow ropes made of polyester (PES) 2/4/7/8/10 t, green tracer thread • Hollow ropes made of polyamide (PA) 2/4/7/8/10 t, blue identification thread • Hollow ropes made from the high-tech fiber Dyneema 12/20 t without tracer • 2/4 t available on 100 meter spools • 7/8/10/12 t available on 50 m spools • 20 t Dyneema rope by the meter or on a 25 m spool • Dyneema ropes of 12 and 20 t suitable for static securing
GEFA Tree Strapbands
Safety is the top priority: GEFA webbing straps provide a safe and tree-friendly complete solution for securing the treetops in the load areas 2t, 4t, 7t and 10t. Highly UV- and weather-resistant, these crown securing systems represent an efficient, safe and tree-friendly solution. As sold by the meter, the easy-to-use straps are also financially interesting for those who are changing or starting out. Their longevity has been scientifically proven. All GEFA straps are provided with a break indicator thread.
The belt straps are closed with high-quality, galvanized buckles. We deliver our belts with standard buckles for 2-4 t. We also have special buckles that, in combination, cover even higher load ranges.
Specifications
• Polyester (PES) belts with breaking strength 2 - 10 t for static security • Polyamide (PA) belts with breaking strength 4 - 7 t for dynamic securing • For static or dynamic backup • 8 year warranty
Product properties
• PES elongation maximum 5%, can be used as static protection from 2 - 10 t • Elongation PA maximum 12%, can be used as dynamic securing from 4 - 7 t • Wide continuous thread to distinguish PES & PA • Black break indicator threads 4 - 7 t webbing • Meter markings for precise cutting to length • Highly UV and weather resistant • On practical 50 or 100 m spools • No additional cambium protection necessary
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Loop straps and tubes
Pressure distribution and protection against rubbing play a major role not only for the tree itself, but also for the lifespan of the canopy. That is why we accompany our range of crown securing systems with a wide range of protective tubes, pressure-distributing friction protection and loop tapes. With the pressure-distributing protective hose GEFAprotect® for 10 t hollow rope connections, we even offer an alternative to loop straps in the upper load range. The GEFA loop tapes are based on the corresponding CE guidelines and GS-tested. Special labels on the side show breaking strength, length and year of manufacture quickly.
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Crown bracing accessories
Splice bodkin
A splice is the break-proof, permanent, non-detachable connection of ropes through a certain type of interlacing. In principle, when splicing braided ropes, the end of the rope is pushed back through the hollow space of the rope over a certain length. The resulting connection gets its strength from the fact that the cavity contracts under load and holds the cable end inside.
Our splicing tools are made of solid aluminum and have a thread for screwing in the hollow cable ends. Available in three sizes.
Special buckle
The special buckles made of galvanized steel make the installation of the crown safety even more flexible, efficient and stable. In addition to the standard buckles for 2-4 t available in the set, you get three-bar buckles for 7, 8 and 10 t. Perfectly rounded for smooth use. This creates permanent connections.
Lashing straps
As a rule, attempts are made to use forks when securing in the crown area. If this is not possible, lashing straps can be pulled in between the hose and the strap and attached to the branch or trunk. This prevents the belt from slipping. With the integrated expansion element, our lashing straps largely prevent ingrowth.
Year ID
With the year identification, the visual inspection of the treetop safety device is made even easier: The installation age is determined at a glance using the blue / gray annual colors established on the market. The hose, separated to approx. 10 cm, can be used universally for belt straps and hollow ropes. The hose is delivered with a roll length of 5 m.
GEFA special adhesive tape
Makes work easier: Our special fabric tape for taping the hollow rope ends, black, weatherproof, reinforced, on a 50 m roll.
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Useful information
• As part of the road safety obligation, private tree owners are also obliged to carry out regular checks. While municipalities and municipalities have to appoint an expert for this, a visual inspection is sufficient for private individuals and property managers. Only when clearly visible damage is found does a specialist need to be consulted.
• While all trees bind CO2, this effect is particularly sustainable with old trees. They store the climate toxin in their wood and thus remove it from the atmosphere in the long term. Preserving established trees makes double sense.
Crown Bracing Safety regulations
When installing crown safety systems, the relevant safety regulations - especially those of the responsible trade association - must be observed. The systems of GEFA Produkte Fabritz GmbH correspond at least to the current ZTV tree care, according to which crown safety systems and their parts must be functional for at least eight years; in some cases they exceed these requirements. The current edition of the set of rules is available from the FLL (Forschungsgesellschaft Landschaftsentwicklung Landschaftsbau e.V.) in Bonn.
According to the current state of knowledge, we recommend replacing the belts and hollow ropes after 8 years, because the crown securing systems are subject to a wide variety of external influences (e.g. UV radiation, moisture, air pollution, etc.). Therefore, no material / defect claim can be derived from the replacement recommendation. In accordance with our terms and conditions, the statutory liability for material and defects applies.
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