Please wait...
0 Cart
Added to Cart
    You have items in your cart
    You have 1 item in your cart
      Total

       A regular question we are asked is "how much will GroundGrabba products hold?"

      As of today, June 23rd 2022 this page has been updated.  

      We have recently been able to carry out our own testing of hold down force of our GroundGrabba's and in most circumstances also have done direct comparison tests to the equivalent length and thickness of the old hammer-in tent peg stakes.

      We also did some angle insertion and pull out tests to try help answer the age old question if tent pegs and stakes should be inserted on an angle away from the load or vertical.  See the blog here.

       

       

      Before we Start, Some REALLY Important Information

      I know that you're probably after definitive exact measurements so you can determine the best option for your ground anchoring or staking purposes. But before you make your mind up about hold down ability please be super aware that there are so many factors that can affect the hold down force available.   

      Things such as:

      • Is the substrate the same variety from the surface to the depth you are anchoring to?
      • If there are different layers in the substrate are they softer or harder?
      • If there are softer layers in the substrate then anchoring ability will be compromised to some degree.
      • If there are harder layers in the substrate it is likely to increase your ground holding.
      • If you hit a hard layer and keep pushing through 'churning' this will lessen your hold down as you are just boring a hole in that section.
      • If you hit a hard section it is best to drill a pilot hole to help drive in the ground anchor without churning.
      • If you drive them in too fast or do not put enough downward pressure on the drill you may just be boring a hole in the earth greatly lessening your hold down ability.
      • Generally speaking the deeper the ground anchor, the greater the holding capacity.
      • Deploying to a depth less than maximum will effect hold down.
      • Is the ground wet or sodden? In our recent tests we've found some places that are like mush from 400mm beneath the surface. Wet ground will reduce your Ground Grabbers holding capacity. 
      • From our tests we have found our ground anchors tend to perform best installed vertically as they work on a different principal to hammer in pegs for ground holding.
      • Generally speaking, the harder the substrate, the greater the hold down.
      • Screwing into the ground can disturb the substrate. At some stage in the future, when the substrate settles it is likely to increase anchoring ability.
      • There are other factors but these will give you an idea why we cannot give you a precise answer.

       

       

      Here are a compilation of our tests so far. 

      Go ahead and contact us if you've any questions we can help answer.

      Please read all notes & footnotes in relationship to the results below

      Vertically installed and vertical load beach sand in kg Grassy softish sandy ground in kg wet/damp dirty sand in kg Mixed Loam in kg. See notes* Mixed Clay in kg. See notes* Farm Clay!
      Spike tent stake 300mm x 10mm 3 17 20 7 23 NA
      GR13S, 300mm x 10mm 21 63 55.5 46 99 227
      Spike tent stake 450mm x 10mm 17.5 30 42.5 19 32 NA
      GR13M, 450mm x 10mm 78 176 158 67 249 443
      Spike tent stake 600mm x 10mm 18 Not Yet Tested 49 73 109 NA
      GR13L, 600mm x 10mm 129 235 249 230 239** 635
      SR14 45 101 132 102 230
      Do not use. Ground too hard
      Pull out test 450mm x 15mm spike stake 7 Not Yet Tested 47 40 63 NA
      GR14S, 450mm x 15mm 72 Not Yet Tested 142 298 316 NA
      Pull out test 600mm x 15mm spike stake 26 Not Yet Tested 69 69 380 NA
      GR14M, 600mm x 15mm 142 Not Yet Tested 299 380 389** NA
      Pull out test 900mm x 15mm spike stake 57 Not Yet Tested 83 >1000# 980# NA
      GR14L, 900mm x 15mm 349 Not Yet Tested 470 >1000# 800**# NA
      GR15 Prototype 530 Not Yet Tested 920 >1000# Not Tested NA
      All are peak readings only in kg
      Do Not Use
      Not Recommended
      Recommended
      *Variable density and damp ground effecting readings
      ** From aprx 400mm down the ground density was soft. Need to retest
      > Reached crane scales 1,000kg max
      # From depth of aprx 600mm Ground extremely dense
      Only deployed to 700mm due to extremely dense ground

       

       IMPORTANT NOTES

      • SR14 =   GroundGrabba Lite ** Not for commercial use
      • All tests are vertical insertion and vertical loading.
      • These are PEAK readings, even if only reached for a fraction of a second.
      • DO YOUR OWN TESTING to determine actual hold down forces in the ground YOU are about to anchor down into. 
      • THESE READINGS ARE UNCERTIFIED AND UNOFFICIAL.
      • DO NOT RELY ON OUR FINDINGS.
      • No data yet available for harder grounds. TBA 
      • DO NOT deploy where there is a risk of striking underground services such as electricity, gas, communications, water, sewer 

      Please note that we are currently taking pre-orders on our GR14 commercial range of GroundGrabba's.

      Independent Reviews

      In August/September of 2018 Rv Daily online magazine did a review of hammer-in tent pegs versus screw-in tent pegs.  This gave us great feedback and from here we realised what was originally intended as a screw-in tent peg, we had overshot the mark and created a ground anchor.  The secret is in with the auger design and the flights.

      Although the table of results from RV Daily has some ambiguity it gave us a good idea as to how ours performed in relationship to the others on the market at the time.

      More recently a customer in the USA did some testing of his own on his farm using his agricultural equipment.  This also revealed some great results for our GroundGrabba Pro I and GroundGrabba Pro II.

      See John Clarkes full video here or the abridged edited version here.