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Categories
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The 10 Rules
- Determining the bracing requirements in case of obvious visible danger.
- Avoid over-dimensioning which would cause increased stress due to a system that is too rigid.
- Install dynamic breaking-bracing at at least 2/3 of the stem height and as horizontally as possible.
- In case of long bracing distances of 8 m or more, don't install a shock absorber.
- Install dynamic crown bracing systems without tension and slack during the summer. In the winter, the connection shall slightly slack so as to avoid permanent load in the summer.
- Install static breaking-bracing at at least 2/3 of the stem height and as horizontally as possible. Decide in every individual case whether the bracing shall be combined with a dynamic system and/or installed at 2 levels. In such case, the lower level is installed at 1/3 of the stem height.
- Install static load/support-bracing as vertically as possible and without shock absorber.
- Never connect stems facing in the same direction with one another.
- Only one load direction per slinging-around.
- Any abrasion, cutting-in and slipping must be permanently avoided.
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Installation Instructions
1. Install the expansion insert
Choose the appropriate length. Compress the rope at a distance of the branch circumference plus 20cm from the end of the rope and insert the expansion insert through the braids into the rope. |
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2. Cut the anti-friction hose to length and pull it over the rope.
Length = at least the circumference of the branch.
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3. Create quick splice
After slinging the rope around the branch, feed the end of the rope about 30cm through the inside of the rope (distance from the stem about 1/2 of the stem diameter) and lead it out again. |
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4. Ceate a compression loop
Form a loop with a diameter of about 10cm. then feed the end of the rope again about 10cm through the inside of the rope and lead it out. This loop will serve for tensioning, as growth reserve and for inspection. |
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5. Insert the shock absorber
Compress the rope at a convenient spot and insert the shock absorber into the rope through the braids.
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6. Cut the rope to length and shrink on the end caps
Pull the end cap at least 10 cm over the end of the rope. Heat the end of the rope with a torch until slight crimping occurs. Then push the end cap back to the end and shrink it on there.
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Installation Rules
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Dynamic breaking-bracing:
- Installation at 2/3 of the stem height
- Install as horizontally as possible
- Do not impede the natural oscillation behaviour, but softly cushion strong deflections
- No overdimensioning so as to avoid increased stress by too rigid systems
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Static breaking-bracing:
- Installation at 2/3 of the stem height
- Install as horizontally as possible
- Lowest-possible rope elongation is most important, therefore the tensile strength should correspond to at least twice the tensile strength of a dynamic breaking-bracing
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Load/Support-bracing:
- Use static systems
- Do not install shock absorbers
- Install as vertically as possible
- Dimension the system according to the expected branch weight and maximum holding force of the crown
Note: a combination of breaking and load-bracing may be useful in individual cases! |
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Dimensions
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Types of Bracing
The ring bracing system usually is sufficient.
Only if two stems need to be especially secured (e.g. V-embranchment), there is installed an additional diagonal bracing - maybe without shock absorber.
Triangular bracing
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Square bracing
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Ring bracing |
Simple connection |
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