Technical information on anchoring technology
Selecting the right type of ground anchor
A differentiation is generally made between two different anchoring methods: permanent anchoring with a permanent anchor or temporary anchoring with a mounting anchor.
If the anchor is required for a single application or for long-term use, we recommend using an anchor that is screwed into the earth using a wrench that directly grips the anchor disc or directly above the disc. On the one hand, the anchor shaft is protected by this wrench against mechanical damage to its surface due to stones or other obstacles as it is screwed into the earth, while on the other hand, the shaft is not deformed by torsion as it is screwed into the earth because the torque is transferred directly to the disc. This means that less material is required for the shaft, which is then also reflected by lower purchase prices.
The following anchors are screwed into the earth according to this principle: Anchoring discs with wire eyelet, Langofix, permanent anchors, special anchors for sewer and sheet pile wall construction, ...
If an anchor is only required in its intended location for a short period of time or will be used repeatedly, it needs to be screwed into the earth using the end of the shaft. As a result, the anchor shaft needs to be significantly thicker and stronger because, as well as the normal pulling forces, it also needs to be able to absorb the torsional forces as it is screwed into the earth. The following anchors are screwed into the earth using a bent eyelet, a square or hexagonal shaft or a special fixture: Rod anchors, mounting anchors, hop anchors, super anchors, ...
If the anchor becomes twisted or bent and needs to be straightened again on a regular basis due to repeated use, it is recommended that the anchor is replaced after a certain period of time due to possible weakening of the steel.
Advantages of screw anchors:
Screw anchors are used to create fixing points in the earth. In comparison to other types of anchoring, screw anchors offer some economical and ecological advantages.
Screw anchors are easy to use because they can be easily and quickly screwed into the earth either manually or mechanically without requiring any great prior knowledge. The soil structure is not disturbed, which avoids any damage to crops and enables the maximum holding capacities to be achieved. Temporary anchoring points using screw anchors can be easily dismantled without any major effort and without damaging crops. Screw anchors are completely recyclable – valuable raw materials can thus be fed back into the material cycle.
Screw anchors can be loaded immediately: This is a decisive advantage in comparison to injection anchors, which require an initial setting process, and hinged anchors, which can only achieve their full holding capacity after the anchor plate has been unfolded in a horizontal direction. Stones or other obstacles can inhibit or even prevent this unfolding process. In addition, unfolding the anchor plate can create cavities in front of and behind the plate which allows subsequent movement of the anchor.
Note on screwing the anchors into the earth:
As the stated holding capacities can only be fully achieved in the direction in which the anchor shaft is pointing, it is important to ensure that the anchor is always installed in the direction of pull. Due to the uniform inclination of our anchor discs and the rounded cutting edge, each anchor can be easily screwed into the earth without destroying the structure of the soil. Similar to the motion of a corkscrew, the anchor screws itself into the earth when the corresponding torque is applied. We recommend a screwing speed of 20-25 rpm. If the anchor is screwed into the earth at a faster speed, the anchor will burrow into the soil. The structure of the soil will be sustainably destroyed as a result and it will not be possible to achieve the desired holding capacities.
We produce high-quality products with the greatest of care. Nevertheless, please note the following:
- Due to the technical hot-dip galvanizing process and associated hanging of our products, it is possible that burrs or sharp points may form on the products during galvanizing that cannot be removed during our manufacturing process. These sharp-edged sections could result in cutting injuries. We can deliver burr-free products on request for an additional fee.
- In the case of drive-in anchors and other anchors that are driven into the earth using impact tools, it is not possible to exclude the possibility that the galvanised coating may be chipped. Improper handling of the impact tools could also result in injuries (we recommend using personal protective equipment such as goggles to protect about chips, gloves to protect against cutting injuries, safety boots, etc.).
- Galvanised surfaces are at risk of corrosion if exposed to moisture in situations where there is insufficient ventilation and thus it is important that our galvanised products are handled appropriately and stored and transported in their packaging in dry conditions (protection against dew and condensation).
- Our products are professionally wrapped in packages, on a pallet or in bundles. In the case of products packaged in bundles, in particular, the wire fastening around the products may spring upwards when opening the bundle and it is advisable to take care when opening the fastenings.
Please don’t hesitate to contact us at any time if you have any questions on the proper handling of the products.