Inputs V2.14 US
Step 1 Choose an application type (one only)
Step 2 Enter weight (structure and contents if applicable)
Auto for containers. If you type a custom tare, it stays as a manual override until you clear the field or hit Reset.
Optional: Leave Contents weight at 0 unless you want it credited:
(tare + contents) improves stability against wind overturning, and is credited against uplift (and flood uplift if enabled).
Step 3 Enter dimensions
Height increases wind side-load overturning (and flood buoyancy if enabled).
Tip: Ground type is set with wind inputs and controls hold-down guide capacity per anchor.
Step 4 Choose load type and wind speed
Assumes wind is checked from both directions (long-side and short-side) to cover cornering winds.
Reference only: 62 mph ≈ a strong storm gust. Increase for exposed sites.
Step 5 Enter safety margin and anchor points available
Step 6 Advanced settings (optional)
Advanced settings
If your result exceeds this cap, the calculator will show the minimum anchor points required to make the configuration feasible.
Step 7 Click Calculate after changes (Reset starts again)
Notes: Results are guidance only. Real wind exposure varies by site (terrain, shielding, gusts).
Some ground can be impenetrable (even with a pilot hole and high-torque tools).
For commercial or safety-critical installs, site testing and engineering advice may be required.
Quick guide
- Wind (side load overturning): Uses wall area and height for overturning leverage. Weight improves stability.
- Wind (roof uplift) (shed mode): Uses roof plan area (L × W). Weight reduces net uplift.
- Flood (float uplift): Buoyancy can be extreme. Wet ground may reduce holding strength—use a higher safety factor and consider engineered solutions.
- Safety factor (%): Adds buffer for unknowns (soil variation, install angle, gusts, saturation).
- Anchor points: Distributes anchors per location. (In Tent mode, we enforce at least 1 anchor per point.)
Results V2.14 US
Governing load case
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Recommended products
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Primary
Available weight (tare + contents)
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Weight credited applied
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Net demand used
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Total anchors required
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Max anchors at a point
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Layout guidance
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Minimum spacing required (in)
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Primary governing side-force (lb)
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Required tie-down demand (lb)
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Why this recommendation
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Copyright & usage
© GroundGrabba — GR14 Anchor Calculator (US / Imperial).
The calculator, assumptions, and output logic are proprietary to GroundGrabba. This tool may not be copied, reverse-engineered, republished, or embedded without permission. Results are indicative only and do not replace site testing or engineering certification.
© GroundGrabba — GR14 Anchor Calculator (US / Imperial).
The calculator, assumptions, and output logic are proprietary to GroundGrabba. This tool may not be copied, reverse-engineered, republished, or embedded without permission. Results are indicative only and do not replace site testing or engineering certification.