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Ground Anchor, EA 10400/12800/12999

Erdanker Bodenanker

Product sheet

Description / prices

Screwing anchor made of steel, galvanized.

  • EA 10400: lenght 400 mm, material strength 10 mm, diameter screwing disk of 70 mm - Price

  • EA 12800: length 800 mm, shaft strength > 12 mm, diameter screwing disk of 120 mm, very heavy construction, break load to approx. 500 kg - Price

  • EA 12999: length 800 mm, shaft strength > 12 mm, diameter screwing disk of 120 mm, very heavy construction with welded eylet, break load to approx. 1.000 kg - Price

                     

Use

Ground anchor earth and soil. For light to heavy loads. For tensing bracing wires, such as free-standing trellises or cables which are attached to the rafters. EA 12800 load capacity: 250 kg and much more, up to maximum approx. 1,000 kg (i.e. 1 wire rope 4 mm). EA 10400 better for less demanding needs such as securing trees and also for temporary buildings or for where only a small layer of soil lies over rock field is available. EA 10400 achieves higher separation values when fitting under sod or other dense surface root systems (reinforcing effect). The deeper the ground anchors are set, the higher the holding forces.  When heavily used attachments with 4 mm wire rope, where towing loads of 500-1,000 kg per anchor occur, screw EA 12800 10 - 20 cm below ground level,  thus doubling the load capacity. Not for gravel, rocky soil or gravel-bearing soils. Please also use our information to select matching eyebolts.

 

Installation

First you need to know whether there is sufficient ground depth without stone (or at least with a few stones or gravel) stone deco also. For installation, the screw insertion point is marked with a large cross to always observe the position of the anchor shaft while screwing the basis of the coordinates and, if necessary, to correct.  The ground anchor is placed on the ground and screwed by means of an inserted stable rod  through the eyelet. Slight pressure from above is required. With a heavy hammer (mallet) beat on the eye, to make driving-in easier. The axis of the ground anchor should be approximately identical to the later axis of the tensile load. Sometimes, rubble or debris is in the ground, and this is highly compressed. It must be 'drilled' before with the anchor (see photo), but not to the final depth of the ground anchor. Then insert the anchor in the pre-hole again partially fill with rubble, then heavily condense this (hit with masher or  hammer). Then the anchor needs  further turning. The filling acts as backrest and provides support when finally screwing the component in.

 

Special Features

In open land, in a garden, or something similar, the earth anchor can be put in mostly without doubt if it is sure that no electric or pipelines are to be found nearby underground. Anytime you are approaching on house walls you must always calculate with something possibly underground. Here, 30-50 cm should be carefully searched for tell tale signs of electric lines: Cable bands and fine gravel, as it is used when laying the electric cables are good sign electric is underneath. Driving the screw disk 10 - 20 cm deap in the hole is enough. Place stones or similar objects to weigh it down and cover it. Fill the hole with earth and compress it by clomping it down. Ths adds to the stability.

 

Remarks on Quality and Price

For price reasons, for some years we have offered earth anchors from a simple, smooth, plain carbon steel which generally had a stem diameter of 10.5 mm (see product photos). Such anchors are still traded elsewhere. We had problems , however, regarding the twisting strength (torsional stiffness). When an obstacle in the soil appears (i.e. large stone) and you have been shifting and twisting strongly,  the soft shaft deforms and more turning won’t be possible. Standstill!  Therefore we only use earth anchors EA 12800 from ribbed and pre-stretched (hardened) concrete steel now, naturally galvanized.

 

Origin

"Made in Germany" (Baden-Wurttemberg)

Bodenanker klein
Small anchor EA 10400 (shaft is a little longer than on the photo)
Bodenanker Abspannung
Tension with ground anchor EA 12800
Erdanker im Pflaster
Earth anchor in pavement
Bodenanker eindrehen
Earth anchor at start of turning
Erdanker einschrauben
Twisting , turning in.
Schraubanker einschlagen
When necessary turning AND hitting
Bodenanker biegen
Bending with an iron bar