Campbell Scientific CM106K Tripod - Manual (Page 17)

CM106K Tripod
2.5 Staking the Tripod Feet
For additional stability, the tripod can be staked to the ground using (3) PN
17049 ground spikes, or secured with user-supplied anchors through the holes
in the feet. Drive the spike at an angle through the hole in each foot.
Spikes may not be adequate depending on soil structure, maximum wind
speeds experienced at the site, mast height, or wind load from the
instrumentation. For questionable situations, concrete footings for the tripod
feet and guy anchors should be considered.
FIGURE 2-5. Staking the tripod feet
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